Kev Taw Qhia Txog Kev Nthuav Dav ntawm Emulsion hauv Kev Tsim Xim
Kev ntsuas qhov ceev ntawm cov xim pleev yog ib qho tseem ceeb ntawm kev tswj xyuas zoo hauv cov txheej txheem tsim xim. Kev txiav txim siab thiab tswj qhov ceev ntawm cov xim pleev kom raug ua kom cov khoom zoo sib xws thoob plaws hauv kev tsim khoom loj. Hauv cov txheej txheem tsim xim pleev, qhov ceev yog txhais tias yog qhov hnyav ib chav ntim, thiab nws raug cuam tshuam ncaj qha los ntawm qhov sib xyaw ntawm cov khoom xyaw xws li cov binders, pigments, solvents, thiab additives. Rau cov xim pleev vaj tse, tshwj xeeb tshaj yog cov hom dej, qhov ceev ntawm cov xim pleev tsis tsuas yog cuam tshuam rau cov txheej txheem ua haujlwm tam sim ntawd tab sis kuj tseem muaj kev ruaj khov mus sij hawm ntev, kev siv tau, thiab kev ua haujlwm ntawm cov chaw tsim kho.
Thaum lub sijhawm tsim cov xim pleev tsev, cov emulsion feem ntau muaj cov khoom sib txuas polymer - xws li cov uas tau los ntawm butyl acrylate thiab methyl methacrylate - uas tau tawg rau hauv dej. Butyl acrylate muab kev ywj pheej thiab kev ywj pheej, uas yog qhov tseem ceeb rau cov ntawv thov uas xav tau zaj duab xis mos dua thiab kev ua haujlwm zoo dua hauv qhov kub qis. Methyl methacrylate, ntawm qhov tod tes, muab qhov nyuaj, lub zog kho tshuab siab dua, thiab kev tiv taus dej thiab tshuaj lom neeg. Los ntawm kev kho qhov sib piv ntawm cov monomers no, cov chaw tsim khoom tuaj yeem ua tiav cov khoom zaj duab xis tseeb uas xav tau rau cov xim pleev tsev xws li cov txheej txheem phab ntsa ruaj khov thiab cov tiav sab nraud ruaj khov.
Kev Tsim Khoom Siv Roj Hmab
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Kev ntsuas qhov ntom ntawm cov emulsion kom raug yog qhov tseem ceeb rau ntau yam: nws ua kom muaj kev sib xws ntawm ib pawg mus rau ib pawg, tiv thaiv kev sib cais lossis kev sib cais theem, ua kom cov xim thiab cov binder siv tau zoo, thiab tswj cov dej ntws, ziab, thiab npog lub zog ntawm cov xim. Kev hloov pauv ntawm qhov ntom tuaj yeem ua rau pom qhov tsis zoo xws li qhov ci tsis sib xws, qhov tsis sib xws ntawm cov qauv, lossis txo qhov ruaj khov, cuam tshuam rau kev ntseeg tau thiab qhov zoo li ntawm cov xim pleev xim tiav.
Cov txheej txheem tsim khoom siv xim niaj hnub no vam khom kev ntsuas qhov ceev tiag tiag kom ua kom zoo dua qub thiab tswj tau zoo. Cov khoom siv hu ua cov ntsuas qhov ceev ntawm cov kua, suav nrog cov ntsuas qhov ceev hauv kab uas Lonnmeter tsim, ntsuas qhov ceev ncaj qha hauv cov txheej txheem. Cov txheej txheem hauv kab ua rau muaj kev hloov kho tam sim ntawd, xyuas kom meej tias qhov ceev tseem nyob hauv qhov kev kam rau siab thoob plaws cov khoom siv raw, kev sib tov, kev sib tsoo, thiab cov kauj ruam sau cov khoom. Qhov no txo qis cov khib nyiab, txo qhov xav tau rov ua haujlwm, thiab txhim kho kev rov ua dua thoob plaws cov pawg.
Cov lus tseem ceeb uas cuam tshuam rau qhov kev sib tham no suav nrog butyl acrylate, methyl methacrylate, kev ntsuas qhov ceev tiag tiag, thiab lub ntsuas qhov ceev ntawm cov kua. Butyl acrylate thiab methyl methacrylate ua haujlwm ua cov khoom tseem ceeb hauv cov acrylic binder emulsions, tswj kev ywj pheej thiab lub zog. Kev ntsuas qhov ceev tiag tiag yog hais txog kev saib xyuas qhov ceev tas mus li thaum lub sijhawm tsim khoom, tso cai rau cov chaw tsim xim kom kho qhov sib txawv thaum lawv tshwm sim. Lub ntsuas qhov ceev ntawm cov kua yog lub sensor lossis cov cuab yeej siv rau lub hom phiaj no, txhawb nqa ob qho tib si kev ua kom zoo dua ntawm cov txheej txheem tsim xim thiab kev tswj hwm zoo ntawm cov xim emulsion. Kev saib xyuas inline tiag tiag tsis yog qhov tseem ceeb rau kev tswj hwm cov khoom sib xws xwb tab sis kuj rau kev ua kom tau raws li kev cai lij choj thiab kev cia siab zoo ntawm cov neeg siv khoom hauv kev sib tw ntawm cov txheej txheem siv xim vaj tse.
Cov Khoom Siv Raw Tseem Ceeb hauv Emulsion Polymerization rau Kev Tsim Xim
Butyl Acrylate
Butyl acrylate (BA) yog lub hauv paus tseem ceeb hauv cov txheej txheem tsim xim, tshwj xeeb tshaj yog hauv cov txheej txheem emulsion dej uas tsom mus rau cov xim pleev tsev. Txoj kev lag luam tseem ceeb rau BA synthesis vam khom acid-catalyzed esterification, qhov twg acrylic acid reacts nrog n-butanol. Cov txheej txheem no feem ntau siv cov tshuaj catalysts acidic xws li sulfuric acid lossis p-toluenesulfonic acid. Cov tshuaj tiv thaiv tshwm sim hauv qab reflux, feem ntau ntawm 90–130 ° C, nrog kev tshem tawm dej tas mus li kom tsav qhov sib npaug mus rau ester. Ion-exchange resins tam sim no yog ib qho rau kev nce catalyst rov qab thiab kev ua raws li ib puag ncig. Cov khoom kawg dhau los ntawm kev rov ua dua thiab ntxuav kom tau raws li qib xim purity, suav nrog kev kuaj xyuas zoo rau cov nqi acid, xim, thiab purity los ntawm roj chromatography. Cov tshuaj tiv thaiv polymerization trace xws li MEHQ tau qhia los tiv thaiv kev polymerization tsis xav tau thaum lub sijhawm khaws cia thiab xa khoom.
Ua haujlwm tau zoo, butyl acrylate muab qhov kub hloov pauv iav qis heev (Tg) rau cov copolymers uas tshwm sim, feem ntau qis dua -20 ° C. Cov khoom no yog qhov tseem ceeb hauv cov qauv xim kom ntseeg tau tias cov zaj duab xis muaj kev ywj pheej thiab kev nplaum ruaj khov, tshwj xeeb tshaj yog nyob rau hauv huab cua uas muaj qhov kub thiab txias heev. Kev ywj pheej ntxiv pab cov zaj duab xis xim tiv taus kev tawg thiab tawg ntawm ntau yam substrates thiab cov xwm txheej siv, uas yog qhov tshwj xeeb tshaj yog muaj txiaj ntsig zoo rau cov xim pleev tsev ntau.
Butyl acrylate kuj tseem ua rau cov xim pleev xim tsis yooj yim puas tsuaj los ntawm huab cua. Nws qhov elasticity pab cov xim pleev kom haum rau kev txav ntawm cov khoom siv los ntawm kev hloov pauv kub thiab kev ntxhov siab ntawm lub cev. Ntxiv mus, BA cov qauv molecular pab tiv thaiv kev puas tsuaj los ntawm UV hluav taws xob - qhov kev txhawj xeeb tas mus li hauv cov txheej txheem pleev xim rau sab nraud. Thaum tsim kom zoo, BA-based resins tuaj yeem ua kom pom kev txhim kho tseem ceeb hauv kev tiv thaiv dej thiab kev ua haujlwm ib puag ncig piv rau cov txheej txheem ib txwm muaj. Cov polymers no kuj qhia tau tias muaj kev ci ntsa iab thiab kev khaws xim hauv qab lub hnub ci, pab cov xim pleev xim rau kev tiv thaiv thiab kho kom zoo nkauj rau lub sijhawm ntev dua. Cov khoom ntxiv, xws li nano magnesium oxide, txhim kho cov khoom no ntxiv - txhim kho qhov tsis pom kev, ci ntsa iab, thiab txawm tias tiv taus kab mob yam tsis muaj kev lom biocidal, ua raws li cov kev cai lij choj tam sim no rau cov tshuaj pleev xim muaj kev nyab xeeb dua.
Methyl Methacrylate (MMA)
Methyl methacrylate (MMA) yog lwm yam tseem ceeb hauv kev tsim xim pleev xim, tshwj xeeb tshaj yog rau cov xim pleev tsev uas xav tau lub zog siab thiab qhov ruaj khov ntawm qhov chaw. MMA lub luag haujlwm hauv cov txheej txheem copolymerization, tshwj xeeb tshaj yog nrog BA, yog los muab cov qauv tawv thiab ua kom tsis txhob puas rau cov xim pleev xim. Hauv cov txheej txheem tsim xim, MMA ua rau qhov kub hloov pauv iav ntawm cov copolymers nce, ua rau cov zaj duab xis tawv dua uas tsis tshua muaj kev cuam tshuam rau kev hnav lub cev thiab kev thaiv thaum lub sijhawm ziab.
Qhov kev sib koom tes ntawm MMA thiab BA yog qhov tseem ceeb rau kev tsim cov xim nrog kev sib npaug ntawm kev ywj pheej thiab kev tawv. Los ntawm kev kho qhov sib piv ntawm MMA-rau-BA hauv emulsion polymerization, cov neeg tsim qauv tuaj yeem tsim cov txheej txheem tsim rau cov kev xav tau siv kawg tshwj xeeb - sib npaug qhov elasticity uas BA muab nrog lub zog kho tshuab uas MMA tau qhia. Piv txwv li, 3: 2 MMA: BA copolymer feem ntau ua rau cov zaj duab xis nrog kev tawv zoo tshaj plaws, modulus, thiab kev ruaj khov ib puag ncig. Qhov kev hloov pauv no tau pom tseeb hauv ntau yam txheej txheem thov pleev xim, qhov twg cov xwm txheej ntawm qhov chaw thiab kev ua haujlwm lub neej sib txawv heev.
Cov kev tshawb fawb tsis ntev los no qhia tau hais tias cov qauv theem ntawm nanoscale, tswj los ntawm cov qauv tsim ntawm MMA-BA copolymers, ua rau muaj kev txhim kho ntxiv. Lwm cov qauv, xws li gradient lossis alternating copolymers, ua rau muaj cov khoom kho tus kheej tshwj xeeb, thaj chaw hloov iav nqaim dua, thiab txhim kho kev tiv thaiv dej thiab kev ntxhov siab ib puag ncig. Cov emulsions sib xyaw ua ke cov khoom ua haujlwm zoo li silica lossis nano magnesium oxide rau hauv MMA-BA matrix ntxiv txhim kho cov khoom xws li kev rwb thaiv tsev kub, kev pom tseeb ntawm lub teeb, thiab lub zog kho tshuab, tso cov khoom siv raw no rau ntawm qhov chaw ntawm kev txhim kho cov txheej txheem tsim xim niaj hnub.
Kev siv BA thiab MMA ua ke hauv kev ua emulsion polymerization—lub hauv paus ntawm ntau cov xim pleev tsev—ua rau nws muaj peev xwm tswj tau qhov zoo ntawm cov khoom. Qhov no tau txhim kho los ntawm kev ntsuas qhov ceev ntawm emulsion tiag tiag thiab cov ntsuas qhov ceev ntawm cov kua dej los ntawm cov chaw tsim khoom xws li Lonnmeter, pab ua kom cov xim pleev emulsion zoo hauv cov lus qhia kev ua tau zoo thaum lub sijhawm tsim khoom tas mus li. Kev saib xyuas cov txheej txheem no yog qhov tseem ceeb rau kev ntsuas qhov ceev hauv kev tsim xim, vim nws ua rau muaj kev tsim cov zaj duab xis tas mus li thiab cov khoom ruaj khov tseem ceeb rau kev siv architectural thiab kev tiv thaiv.
Zuag qhia tag nrho, butyl acrylate thiab methyl methacrylate tsim lub hauv paus rau cov xim pleev dej uas muaj kev ywj pheej, ruaj khov, thiab tiv taus huab cua zoo dua, ua tau raws li cov qauv kev lag luam thiab cov neeg siv khoom xav tau cov xim pleev saum npoo uas kav ntev, tsis ua rau ib puag ncig puas tsuaj.
Cov Txheej Txheem Tsim Xim: Kev Ua Polymerization Niaj Hnub
Kev Npaj Cov Khoom Xyaw thiab Kev Sib Tov Ua Ntej
Kev muab tshuaj Butyl Acrylate (BA), Methyl Methacrylate (MMA), dej, surfactants, thiab cov initiators kom raug yog lub hauv paus tseem ceeb hauv kev tsim xim niaj hnub no. Cov kua monomers BA thiab MMA yuav tsum tau ntxiv nrog kev raug vim lawv qhov piv thiab qhov pub noj ncaj qha tswj cov qauv polymer, qhov hnyav molecular, cov khoom siv kho tshuab, thiab kev nyab xeeb ib puag ncig. Kev tsis raug hauv kev muab tshuaj tuaj yeem ua rau cov tshuaj tiv thaiv tsis tiav, kev ua yeeb yaj kiab tsis tuaj yeem kwv yees tau, lossis cov monomers seem uas cuam tshuam rau ob qho tib si kev ua haujlwm thiab cov qauv kev cai.
Cov txheej txheem dosing feem ntau vam khom gravimetric lossis volumetric metering, ua raws li kev sib xyaw tas mus li kom faib cov monomers sib npaug hauv cov dej nruab nrab nrog surfactants. Surfactants raug xaiv raws li lawv lub peev xwm los tswj cov khoom latex uas loj hlob, thaum cov initiators - feem ntau yog cov free-radical generators - yuav tsum tau qhia rau hauv cov kua ntawm cov concentration tswj hwm kom zoo rau kev loj hlob polymer tas mus li. Tag nrho cov khoom xyaw raug sib xyaw ua ntej nyob rau hauv cov xwm txheej tswj hwm shear kom txo qis cov monomer concentration hauv zos thiab tiv thaiv kev nucleation ua ntej.
Kev kho pH hauv cov khoom sib tov ua ntej, feem ntau yog nyob nruab nrab ntawm 7 thiab 9, yog qhov tseem ceeb. Lub qhov rais pH no ua kom zoo dua qhov electrostatic repulsion ntawm cov dej latex, txhim kho kev ruaj khov ntawm kev sib xyaw thiab txo qis kev sib sau ua ke. Nws kuj ua rau cov neeg pib ua haujlwm zoo dua, vim tias feem ntau cov neeg pib ua haujlwm tau zoo ntawm qhov nruab nrab mus rau qhov alkaline me ntsis. Qhov kev ruaj khov no hauv theem ua ntej sib tov cuam tshuam ncaj qha rau kev faib tawm ntawm cov khoom me me thiab kev sib xws ntawm cov zaj duab xis kawg, uas txhais tau tias kev siv tau zoo dua thiab kev ruaj khov hauv cov xim pleev tsev.
Cov Theem Kev Ua Kom Polymerization
Kev ua polymerization yog ua nyob rau hauv cov reactors tswj qhov kub thiab txias uas tsim los rau kev ua haujlwm ntau lossis kev ua haujlwm tas mus li. Rau ob hom, lub reactor huab cua raug purged nrog cov roj inert xws li nitrogen, uas tiv thaiv kev txwv tsis pub oxygen ua rau radical polymerization thiab cuam tshuam kev oxidation tsis xav tau ntawm monomers thiab polymers. Kev tswj hwm qhov kub thiab txias ua haujlwm tas mus li - feem ntau nyob rau hauv qhov ntau ntawm 70-85 ° C - ua rau muaj kev tswj hwm qhov tseeb ntawm cov nqi decomposition ntawm tus pib thiab cov saw polymer propagation. Kev hloov pauv me me hauv qhov kub lossis cov khoom sib xyaw hauv huab cua tuaj yeem ua rau muaj kev hloov pauv hloov pauv, qhov loj me ntawm cov khoom me me, lossis cov emulsions tsis ruaj khov.
Kev ua kom cov tshuaj polymerization ntau ntau suav nrog kev them tag nrho lossis feem ntau cov tshuaj reactants thaum pib, uas yog qhov zoo rau kev cai lossis cov khoom me me. Nws muab kev ywj pheej ntawm kev tsim cov tshuaj tab sis tuaj yeem raug kev txom nyem los ntawm kev hloov pauv cua sov tsis sib xws, qhov zoo ntawm cov khoom sib txawv, thiab kev pheej hmoo ntawm kev ua kom tsis muaj zog. Qhov sib txawv, cov txheej txheem txuas ntxiv mus thiab ib nrab txuas ntxiv mus tas li muab cov monomers thiab cov pib thaum tshem tawm cov khoom polymer, tswj cov xwm txheej ze-steady-state. Qhov no ua rau cov cua sov dissipation, ruaj khov particle nucleation thiab kev loj hlob, thiab tsim cov latexes sib xws ntau dua, tseem ceeb rau cov txheej txheem siv xim architectural uas cov khoom sib xws yog qhov tseem ceeb.
Ntau lub chaw tsim khoom niaj hnub no nyiam siv semicontinuous emulsion heterophase polymerization (SEHP). Hauv qhov no, kev pub monomer uas tsis muaj roj ntau ua rau muaj kev hloov pauv zoo (feem ntau >90% txhua lub sijhawm), cov monomer seem tsawg heev, thiab kev tswj hwm nruj ntawm qhov loj ntawm cov khoom latex. Cov kev ua haujlwm zoo no tseem ceeb heev rau kev ua kom zoo dua ntawm cov txheej txheem tsim xim thiab kev ruaj khov.
Kev Ua Tom Qab Polymerization
Thaum ua tiav qhov kev sib xyaw ua ke, cov roj hmab latex yuav dhau los ua ib kauj ruam neutralization, kho nws cov pH kom ruaj khov cov emulsion kawg thiab npaj nws rau kev siv tom qab. Cov neeg sawv cev xws li ammonia lossis sodium hydroxide raug muab tshuaj raws nraim; kev neutralization tsis raug yuav ua rau lub cev colloidal tsis ruaj khov thiab ua rau lub zog gloss lossis scrub ntawm cov xim kawg poob qis.
Kev lim dej yog qhov tseem ceeb heev tom qab polymerization. Nws tshem tawm cov coagulum, aggregates, thiab cov impurities tsis tau ua haujlwm, uas yog tias tso tseg, ua rau muaj qhov tsis zoo xws li pinholes lossis tsis sib npaug ntawm cov xim pleev tsev. Cov kev teeb tsa lim dej ntau theem yuav siv tau los ua kom tiav qhov huv si.
Kev sib cais cov khoom seem yog hais txog kev tshem tawm cov monomers seem lossis cov khoom me me uas tsis hnyav, feem ntau los ntawm kev tswj hwm lub tshuab nqus tsev lossis kev tshawb nrhiav tshuaj lom neeg ("redox chase"), ua kom ntseeg tau tias ua raws li kev nyab xeeb thiab cov cai ib puag ncig. Kev ua kom zoo tshaj plaws feem ntau suav nrog kev rov qab siv cov khoom tsis tau ua haujlwm thiab kev koom ua ke cov tshuaj yaj lossis cov kev ntsuas rov ua dua tshiab, ua rau cov txheej txheem tsim khoom lag luam xim niaj hnub no ruaj khov dua thiab siv nyiaj tsawg.
Thoob plaws, kev lees paub zoo nyob ntawm qhov ntsuas viscosity thiab cov khoom khov tiag tiag thiab kev tshuaj xyuas qhov loj me ntawm cov khoom me me. Ntawm no, kev siv Lonnmeter inline density meters ua rau muaj kev ntsuas emulsion density tas mus li, uas yog qhov tseem ceeb rau kev sib raug zoo nrog cov khoom khov thiab kev sib xws ntawm cov khoom. Cov meters no muab kev ntsuas qhov ceev tiag tiag hauv kev tsim xim, txhawb nqa kev ua kom zoo dua qub ntawm cov txheej txheem tsim xim thiab txhawb nqa kev kho tam sim ntawd yog tias pom muaj kev hloov pauv. Kev kuaj xyuas viscosity ntxiv ua kom ntseeg tau tias cov emulsion tiav lawm ua tau raws li cov txheej txheem ua tiav thiab cov qauv siv tseem ceeb rau kev tswj xyuas zoo ntawm cov xim emulsion.
Kev soj ntsuam uas siv cov ntaub ntawv los sib xyaw ua ke ntawm txhua theem—kev npaj cov khoom xyaw, kev ua polymerization, thiab kev kho tom qab—muab qhov kev ntseeg siab thiab kev sib xws ntawm cov khoom tsim nyog hauv kev lag luam xim thiab kev tsim vaj tsev.
Kev Ntsuas Qhov Ceev ntawm Emulsion: Cov Ntsiab Cai thiab Cov Txuj Ci
Qhov ceev ntawm cov emulsion ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tsim xim, tshwj xeeb tshaj yog rau cov qauv uas muaj Butyl Acrylate thiab Methyl Methacrylate hauv cov xim pleev tsev. Qhov ceev yog txuas nrog cov khoom khov, kev sib kis, thiab viscosity - cov ntsiab lus tseem ceeb ntawm ob qho tib si hauv cov txheej txheem thiab kev ua tau zoo ntawm cov xim pleev tsev kawg. Kev sib cuam tshuam ntawm qhov ceev thiab cov khoom no ua rau cov qauv, qhov tsis pom kev, thiab kev ruaj khov ntawm cov xim pleev tsev qhuav, cuam tshuam rau ob qho tib si cov txheej txheem siv thiab ntau yam ntawm cov xim pleev tsev.
Qhov ceev ntawm cov xim emulsion nce ntxiv thaum cov khoom khov nce ntxiv. Qhov compactness ntawm cov resins, pigments, thiab lwm yam khoom khov piv rau theem aqueous tsav qhov sib txawv no. Piv txwv li, cov xim emulsion nrog cov polymer loading siab qhia tsis yog tsuas yog qhov ceev siab, tab sis kuj nce viscosity thiab zaj duab xis-tsim peev xwm. Txawm li cas los xij, kev sib raug zoo tsis yog linear; raws li qhov loj me ntawm cov khoom me me faib dav dua lossis raws li cov khoom polymer deformable tau qhia, nws muaj peev xwm ua kom cov khoom khov nce ntxiv yam tsis muaj qhov nce siab sib xws hauv viscosity, tso cai rau qhov ceev siab dua thaum tswj hwm qhov ntws txaus rau ntau yam kev siv xim architectural. Kev ntsuas qhov ceev ntawm emulsion zoo ua kom ntseeg tau tias cov yam ntxwv no tau ua tiav tas li, txhawb nqa kev tsim cov txheej txheem xim thiab kev tswj hwm zoo thoob plaws txhua theem.
Muaj ntau txoj kev ntsuas rau kev ntsuam xyuas qhov ceev ntawm cov emulsion hauv cov txheej txheem tsim khoom lag luam xim:
Cov Txheej Txheem Gravimetric OfflineKev tshuaj xyuas qhov hnyav ib txwm muaj - qhov twg qhov hnyav ntawm qhov ntim emulsion paub raug ntsuas - muab cov nqi ceev ncaj qha, txhim khu kev qha. Txoj hauv kev no tseem yog qhov pib hauv kev lag luam, tshwj xeeb tshaj yog rau kev tswj xyuas zoo ntawm cov khoom. Txawm li cas los xij, kev ncua sijhawm vim kev npaj cov qauv thiab zaus txwv ua rau nws tsis haum rau kev hloov kho lub sijhawm tiag tiag hauv cov chaw tsim khoom dynamic.
Kev Ntsuas Qhov Ceev Tam Sim NoKev nce qib hauv thev naus laus zis sensor tau tsim cov kev daws teeb meem tiag tiag uas xa cov lus teb ze li ntawm tam sim ntawd rau qhov ceev ntawm emulsion. Cov txheej txheem xws li kev ntsuas ultrasonic - siv qhov ceev ntawm lub suab los kwv yees qhov ceev - thiab oscillating U-tube systems - ncaj qha ntsuas qhov zaus oscillation ntsig txog pawg - tso cai rau kev pom tam sim ntawd ntawm kev hloov pauv ntawm cov txheej txheem, qhov tseem ceeb rau cov txheej txheem tsim xim sai. Kev koom ua ke ntawm cov txheej txheem tiag tiag no muab cov ntaub ntawv tseeb, ua tau raws li kev hloov pauv tam sim ntawd, qhov tseem ceeb rau kev tswj hwm qhov ceev zoo tshaj plaws thoob plaws hauv kev tsim khoom tas mus li.
Kev Saib Xyuas Hauv KabCov ntsuas dej ntws hauv kab, xws li cov uas Lonnmeter tsim tawm, tau tsim tshwj xeeb rau kev saib xyuas online tsis tu ncua hauv cov kab ua haujlwm. Cov cuab yeej no ua rau muaj kev khaws cov ntaub ntawv tas mus li, txuas qhov sib txawv ntawm chav kuaj thiab kev tswj hwm cov txheej txheem. Kev saib xyuas hauv kab ua kom ntseeg tau tias muaj kev saib xyuas tas li ntawm cov qauv ntom ntom yam tsis tau rho tawm cov qauv, txo qhov kev pheej hmoo ntawm kev ua qias tuaj lossis kev ua yuam kev ntawm tus neeg teb xov tooj. Qhov no yog qhov tseem ceeb rau cov lag luam muaj txiaj ntsig zoo li kev tsim khoom lag luam pleev xim, qhov twg kev sib xws ntawm cov khoom thiab kev txo cov khib nyiab yog qhov tseem ceeb.
Kev siv lub ntsuas qhov ceev ntawm cov kua hauv cov txheej txheem zoo li no txhawb nqa kev ua haujlwm ntawm cov khoom lag luam. Kev ntsuas tas mus li, inline ua rau nws muaj peev xwm tswj cov nqi pub, tswj cov tshuaj ntxiv, thiab ntes cov kev hloov pauv ntawm cov khoom siv emulsion vim muaj kev hloov pauv ntawm cov khoom siv raw lossis kev cuam tshuam ntawm cov txheej txheem. Piv txwv li, kev nyeem cov qhov ceev inline tam sim ntawd qhia txog txhua qhov kev hloov pauv ntawm cov ntsiab lus Butyl Acrylate lossis Methyl Methacrylate, tso cai rau cov neeg teb xov tooj kho cov kev sib xyaw thiab ua raws li cov qauv tswj xyuas zoo ntawm cov xim emulsion. Txoj hauv kev no txo qis kev tsim khoom tsis raws li qhov xav tau, txo cov peev txheej pov tseg, thiab ua kom zoo dua cov txheej txheem tsim xim thoob plaws txhua hom xim architectural.
Cov kev tshawb fawb tau ua pov thawj tias kev ntsuas qhov ceev hauv kab, thaum ua ke nrog kev nkag siab los ntawm viscosity thiab particle size distribution analytics, muab kev ntseeg siab tshaj plaws hauv kev ua tiav cov dej ntws thiab cov yam ntxwv ua zaj duab xis hauv cov dej emulsions. Kev siv cov ntsuas qhov ceev ntawm cov kua dej ua rau muaj kev txhim kho zoo los ntawm cov ntaub ntawv, txhawb nqa ob qho tib si kev hloov kho sai ntawm cov qauv tshiab - suav nrog cov txheej txheem binder ruaj khov lossis rov ua dua tshiab - thiab kev ua haujlwm ruaj khov, muaj zog ntawm cov kab ntau lawm xim loj.
Kev Ntsuas Qhov Ceev Tiag Tiag Hauv Kev Tsim Xim
Kev siv cov ntsuas qhov ceev ntawm cov kua dej siab heev tau hloov pauv cov txheej txheem tsim xim, tshwj xeeb tshaj yog hauv cov xim pleev tsev thiab cov txheej txheem emulsion. Cov cuab yeej hauv kab, xws li cov uas tsim los ntawm Lonnmeter, muab kev ntsuas qhov ceev thiab kev tswj hwm tas mus li, lub sijhawm tiag tiag thoob plaws hauv cov txheej txheem tsim xim. Muab tso ncaj qha rau hauv cov kab hloov pauv, cov ntsuas no saib xyuas kev hloov pauv qhov ceev thaum lub sijhawm sib xyaw, emulsification, thiab cov theem hloov kho. Qhov no ua rau muaj kev tawm tswv yim tam sim ntawd uas yog qhov tseem ceeb rau kev tswj hwm cov khoom zoo sib xws thaum tuav cov khoom sib xyaw ua ke uas muaj Butyl Acrylate, Methyl Methacrylate, cov kuab tshuaj, cov xim, thiab ntau yam khoom ntxiv.
Kev siv cov tshuab ntsuas qhov ceev uas ua haujlwm tau zoo hauv kab pab txhawb kev tswj hwm qhov zoo ntawm cov xim pleev xim. Cov khoom siv no xa cov ntaub ntawv ncaj qha los ntawm cov txheej txheem, tshem tawm qhov xav tau kev kuaj tes thiab kev kuaj hauv chaw kuaj mob, uas tuaj yeem ncua kev kho yog tias muaj cov khoom sib txawv. Cov kab tsim khoom hauv kev lag luam xim tau txais txiaj ntsig los ntawm qhov kev saib xyuas tsis tu ncua no, ua kom ntseeg tau tias txhua pawg ua tau raws li cov lus qhia ceev uas tseem ceeb rau kev sib xws ntawm cov xim, kev npog, kev ruaj khov, thiab viscosity.
Kev soj ntsuam qhov ceev ntawm cov xim tiag tiag ua rau muaj txiaj ntsig zoo rau kev ua kom zoo dua ntawm cov txheej txheem tsim xim. Kev soj ntsuam tas mus li txo cov khoom siv raw pov tseg los ntawm kev tso cai rau kev kuaj pom thiab kho qhov sib txawv tam sim ntawd. Piv txwv li, yog tias cov ntsiab lus ntawm cov kuab tshuaj ploj mus thaum ntxiv dej rau cov kua roj hmab latex, lub ntsuas yuav ntes tau txawm tias qhov hloov me me ntawm qhov ceev, ua rau kev tswj hwm cov kwj dej nkag tsis siv neeg. Qhov kev teb sai no txo cov khoom tsis raws li qhov tau teev tseg, tiv thaiv kev pov tseg kim, thiab ua kom muaj kev sib xws - tseem ceeb rau cov xim pleev tsev uas xav tau cov kev cai nruj rau ob qho tib si kev ua tau zoo thiab kev ua raws li txoj cai. Kev sib xws ntawm cov khoom lag luam ntau ntau tau txhawb nqa ntxiv, tseem ceeb rau cov haujlwm loj lossis cov xaj rov ua dua uas yuav tsum tau lees paub tias xim thiab qhov tiav sib xws.
Kev sib koom ua ke ntawm cov txheej txheem tau ua kom yooj yim dua nrog kev sib txuas lus digital. Lonnmeter cov ntsuas dej ceev muaj cov interfaces xws li 4–20 mA thiab RS485 outputs, haum rau kev sib koom ua ke nrog PLC-raws li automation, tus qauv hauv cov txheej txheem tsim khoom lag luam niaj hnub no. Kev sib txuas ncaj qha rau PLC systems ua rau cov ntaub ntawv ceev tuaj yeem qhia txog kev tswj hwm lub sijhawm tiag tiag: kho qhov ceev ntawm lub twj tso kua mis, qhov chaw valve, thiab cov txheej txheem dosing raws li qhov xav tau los tswj cov lus qhia tshwj xeeb. Yog li ntawd, cov txheej txheem xws li kev sib cais ntawm Titanium Dioxide, ntxiv cov coalescents, lossis thinning nrog cov kuab tshuaj raug tswj hwm nruj, txo qhov yuam kev ntawm tib neeg. Kev tau txais cov ntaub ntawv rau kev taug qab thiab kev ua raws li txoj cai yog automated, pab txhawb kev tshuaj xyuas rau txhua pawg.
Cov chaw tsim xim niaj hnub no vam khom cov kev daws teeb meem tswj kev ceev nrooj no los tswj cov kev tswj hwm zoo thoob plaws ntau yam kev siv xim thiab cov qauv tsim vaj tsev. Qhov ruaj khov thiab kev hloov pauv tau ntawm cov cuab yeej zoo li cov los ntawm Lonnmeter ua kom ntseeg tau tias muaj kev ntseeg siab hauv ntau yam kev tsim khoom, thaum ua kom muaj kev txhim kho cov txheej txheem txuas ntxiv mus thoob plaws lub neej tsim xim.
Kev Tswj Xyuas Zoo thiab Kev Txhim Kho Kev Ua Haujlwm
Kev tswj kom cov emulsion ruaj khov thaum lub sijhawm khaws cia thiab xa khoom yog qhov tseem ceeb hauv cov txheej txheem tsim xim. Hauv kev tsim cov xim pleev tsev, xws li cov uas siv Butyl Acrylate thiab Methyl Methacrylate, kev ntsuas qhov ceev ntawm emulsion kom raug yog ib qho kev tiv thaiv ua ntej kom tsis txhob muaj kev tsis ruaj khov. Qhov ceev ntawm cov emulsion ncaj qha tswj hwm qhov sib npaug ntawm cov khoom sib xyaw (polymer lossis pigment) thiab cov theem txuas ntxiv (aqueous). Yog tias qhov ceev tsis sib xws, lub zog gravitational ua rau cov khoom me me txav mus los uas ua rau cov theem sib cais, flocculation, thiab sedimentation sai dua, ua rau cov xim puas thiab ua rau cov khoom txee tsis zoo. Kev tswj kom qhov ceev raug, txhawb nqa los ntawm kev ntsuas lub sijhawm tiag tiag siv lub ntsuas qhov ceev ntawm kua, yog qhov tseem ceeb kom ntseeg tau tias cov kev pheej hmoo no raug txo qis thaum lub sijhawm khaws cia ntev thiab cov voj voog kub sib txawv uas kav ntev thaum lub sijhawm xa khoom.
Qhov kev sib cuam tshuam ntawm qhov ceev ntawm cov emulsion thiab kev ua tau zoo ntawm cov khoom muaj ntau yam. Rau cov neeg tsim xim, qhov zoo nyob ntawm qhov ua tau rov ua dua ntawm txhua pawg. Txawm tias qhov sib txawv me me ntawm qhov ceev tuaj yeem taug qab mus rau qhov sib txawv ntawm viscosity, xim sib xws, zaj duab xis txuas ntxiv mus, thiab cov khoom siv. Kev ntsuas qhov ceev hauv kab, tshwj xeeb tshaj yog cov uas tau txais ntawm cov ntsiab lus tswj hwm tseem ceeb los ntawm cov khoom siv xws li Lonnmeter inline density meter, pub cov ntaub ntawv tam sim ntawd rau cov pab pawg tswj xyuas zoo, ua rau muaj kev txiav txim siab sai thiab kev kho cov txheej txheem tiag tiag. Txoj hauv kev no yog qhov tseem ceeb rau kev tswj xyuas qhov zoo ntawm cov emulsion xim los ntawm kev txhawb nqa kev tswj xyuas cov txheej txheem suav, txo qhov sib txawv ntawm ib pawg mus rau ib pawg, thiab yog li ua rau muaj kev lag luam zoo dua.
Qhov cuam tshuam ntawm kev tswj qhov ceev tshaj qhov ruaj khov—nws cuam tshuam rau cov ntsuas kev ua tau zoo tseem ceeb hauv cov xim pleev tsev. Piv txwv li, lub sijhawm qhuav yog tswj hwm los ntawm cov dej thiab cov khoom khov ntawm cov emulsion. Qhov ceev ntau dua feem ntau qhia txog cov khoom khov ntau dua, uas tuaj yeem ua kom cov khoom polymer sib sau ua ke sai dua. Qhov no ua kom cov zaj duab xis tsim sai dua, tsim cov txheej txheem ruaj khov dua, tiv taus qhov tsis zoo uas haum rau ntau yam kev siv xim pleev tsev. Txawm li cas los xij, qhov ceev ntawm emulsion siab dhau yuav cuam tshuam kev ua haujlwm, txwv lub sijhawm qhib uas xav tau rau kev sib xyaw lossis kev kho, thiab ua rau muaj kev pheej hmoo ntawm kev ntxhov siab ntawm cov zaj duab xis sab hauv thaum lub sijhawm dej evaporation—tej zaum yuav ua rau tawg lossis tiv thaiv kev nyab xeeb zoo tshaj plaws.
Kev tsim cov zaj duab xis kuj raug cuam tshuam los ntawm qhov ceev ntawm cov emulsion, vim tias qhov ceev sib npaug ua kom cov khoom sib xyaw ua ke, txhawb nqa kev tsim cov zaj duab xis tsis tu ncua thiab tsis nkag tau. Cov kev tshawb fawb los ntawm cov phooj ywg tau lees paub tias qhov ceev uas tau kho kom zoo ua rau cov zaj duab xis tsis yooj yim rau porosity, txo cov kev nkag mus rau cov dej noo lossis tshuaj lom neeg thiab txhim kho kev tiv thaiv kev puas tsuaj UV thiab kev raug ib puag ncig - cov yam ntxwv tseem ceeb rau kev tiv thaiv huab cua ntawm cov xim pleev tsev. Cov chaw tsim khoom yuav tsum kho qhov ceev ntawm cov emulsion kom zoo kom sib npaug zoo tshaj plaws ntawm kev yooj yim siv, ziab sai, thiab kev ruaj khov ntawm kev ua haujlwm mus sij hawm ntev.
Kev ntsuas thiab tswj qhov ceev ntawm cov xim tiag tiag yog qhov tseem ceeb hauv cov txheej txheem tsim khoom lag luam xim loj, qhov twg kev poob nyiaj txiag los ntawm kev tsis ruaj khov thiab kev ua haujlwm tsis sib xws tuaj yeem ua rau muaj kev puas tsuaj loj heev. Kev ua kom qhov ceev kom raug tsis yog tsuas yog tswj cov khoom zoo nkauj thiab ua haujlwm tau zoo thoob plaws kev khaws cia, kev xa khoom, thiab kev siv, tab sis kuj tiv thaiv lub koob npe nrov ntawm cov chaw tsim khoom thiab kev txaus siab ntawm cov neeg siv kawg. Hauv kev tsim xim vaj tsev, kev ua tiav qib kev lees paub zoo no los ntawm cov cuab yeej siv siab heev, zoo li cov ntsuas qhov ceev hauv kab, tam sim no yog kev coj ua zoo tshaj plaws hauv kev lag luam.
Kev Xav Txog Kev Lag Luam thiab Ib puag ncig
Kev ntsuas qhov ceev ntawm cov emulsion ua tau zoo ua lub luag haujlwm tseem ceeb hauv kev siv cov khoom siv raw thoob plaws hauv cov txheej txheem tsim xim. Hauv kev tsim cov xim pleev tsev, qhov twg cov khoom xyaw xws li Butyl Acrylate thiab Methyl Methacrylate yog cov monomers tseem ceeb, kev ua tiav qhov ceev ntawm emulsion kom raug ua kom ntseeg tau tias cov khoom siv raw sib xws nrog cov kev xav tau ntawm txhua pawg. Qhov no txo qis kev siv ntau dhau lossis tsis txaus ntawm cov tshuaj kim thiab cov xim dispersions, txo ob qho tib si nqi thiab kev siv cov peev txheej.
Kev ntsuas qhov ceev kom meej hauv cov txheej txheem tsim xim yog qhov tseem ceeb heev vim tias qhov nyuaj ntawm cov xim pleev tsev niaj hnub no. Qhov sib txawv me me ntawm qhov ceev tuaj yeem ua rau muaj kev hloov pauv loj hauv viscosity lossis pigment suspension, yuam cov chaw tsim khoom ua qhov kev kho kom raug lossis rov ua dua tag nrho cov pawg. Qhov no tsis yog tsuas yog pov tseg cov khoom siv raw xwb tab sis kuj ua rau cov neeg ua haujlwm thiab lub zog siv ntau ntxiv. Cov txheej txheem inline, xws li Lonnmeter's liquid density meter, muab cov lus teb tam sim ntawd uas txhawb nqa kev kho cov txheej txheem tam sim ntawd thiab kev tswj hwm nruj rau kev siv cov khoom siv thaum lub sijhawm ua kom zoo dua ntawm cov txheej txheem tsim xim.
Cov emulsions ruaj khov ua rau muaj kev cuam tshuam tsawg dua thiab cov khoom tsis zoo. Thaum qhov ceev ntawm cov emulsion raug tswj kom zoo, cov teeb meem xws li kev sib cais theem, kev sib sau ua ke, lossis kev sib koom ua ke raug txo kom tsawg. Cov qhov tsis zoo no feem ntau yuav tsum tau kho - ntxiv cov stabilizers, ua kom muaj kev ntxhov siab ntau ntxiv, lossis pov tseg cov pawg tsis zoo - tag nrho cov no ua rau muaj kev siv khoom ntau ntxiv thiab tsim cov khib nyiab tsis tsim nyog. Los ntawm kev saib xyuas qhov ceev tas li, cov chaw tsim khoom txo qhov zaus ntawm cov xwm txheej zoo li no, ntxiv kev txuag cov khoom siv raw thiab txo cov dej khib nyiab hauv qhov chaw pov tseg.
Cov ntaub ntawv tseem ceeb los ntawm kev ntsuas qhov ceev tiag tiag ua rau muaj kev hloov kho cov txheej txheem ntse dua, tshwj xeeb tshaj yog thaum lub sijhawm polymerization ntawm acrylic dispersions rau cov xim pleev dej. Piv txwv li, siv Lonnmeter's inline density meters thaum lub sijhawm emulsion synthesis tso cai rau cov chaw tsim khoom kom paub txog qhov sib txawv ntawm cov nqi hloov pauv monomer lossis cov ntsiab lus khov thaum lawv tshwm sim. Tom qab ntawd lawv tuaj yeem kho cov khoom siv raw, qhov kub, lossis cov nqi sib xyaw kom tswj tau cov xwm txheej zoo tshaj plaws. Txoj hauv kev tsav tsheb ntawm cov ntaub ntawv tiag tiag no txo cov khoom siv raw ntau dhau, txwv cov pa roj carbon ntawm cov txheej txheem tsim khoom lag luam xim, thiab pab txo cov pa phem uas cuam tshuam nrog cov khoom tsis haum thiab kev siv hluav taws xob.
Piv txwv li, yog tias tsis tau txog qhov ceev ntawm cov emulsion thaum lub sijhawm ua ib pawg, kev ntsuas qhov ceev tiag tiag tuaj yeem ua rau kom txo qis kev ntxiv monomer ntxiv lossis kho cov qib surfactant, yog li zam kev siv cov khoom xyaw kim xws li Butyl Acrylate ntau dhau. Qhov no ua kom ntseeg tau tias tsuas yog siv cov khoom siv ntau npaum li qhov tsim nyog, ua raws li ob qho tib si lub hom phiaj kev lag luam thiab cov cai ib puag ncig.
Qhov cuam tshuam ntawm kev ntsuas qhov ceev ntawm kab txuas mus rau qhov txo qis cov khib nyiab ntawm ntau qhov chaw hauv cov txheej txheem tsim khoom lag luam xim. Los ntawm kev ua kom muaj kev cuam tshuam sai ua ntej cov khoom siv tsis raws li qhov tau teev tseg, cov chaw tsim khoom tuaj yeem tswj cov khoom tsim tawm tsis raws li qhov tau teev tseg - thiab cov kev cai pov tseg cuam tshuam - kom tsawg kawg nkaus. Qhov no ua rau muaj kev txo qis ntawm cov khoom siv pov tseg thiab txhawb nqa kev saib xyuas ib puag ncig hauv kev lag luam.
Yog li ntawd, kev ntsuas qhov ceev hauv kev tsim xim yog txuas ncaj qha rau kev txhim kho kev ruaj khov. Nws txhawb nqa kev siv cov peev txheej zoo, pab ua kom tau raws li cov kev txwv ntawm kev tso pa tawm los ntawm kev ruaj khov ntawm cov txheej txheem, thiab txhim kho kev tswj hwm zoo ntawm cov xim emulsion. Cov khoom xim tsis tu ncua txhais tau tias rov ua dua tsawg dua thiab txo qis cov pa phem ntawm cov khoom tsim tawm. Kev saib xyuas tiag tiag, xws li qhov uas tau ua los ntawm Lonnmeter's inline meters, tso cai rau kev hloov kho cov txheej txheem dynamic, kom ntseeg tau tias cov txiaj ntsig ib puag ncig thiab tus nqi tau pom thoob plaws hauv lub voj voog tsim khoom.
Los ntawm kev koom ua ke qhov kev ntsuas qhov ntom ntom kom raug rau hauv cov txheej txheem niaj hnub ntawm cov txheej txheem tsim xim, cov tuam txhab tsim khoom tau txais lub zog muaj zog rau kev tswj tus nqi thiab kev lav phib xaub rau ib puag ncig, ua rau lawv muaj kev sib tw thiab kev ua raws li cov qauv niaj hnub no hauv kev lag luam xim.
Kev daws cov teeb meem tshwj xeeb hauv kev lag luam
Kev tsim xim pleev tsev, tshwj xeeb tshaj yog nrog butyl acrylate (BA) thiab methyl methacrylate (MMA) copolymers, ntsib teeb meem loj heev ntawm kev tswj qhov ceev ntawm emulsion uas cuam tshuam nrog ob qho tib si kev hloov pauv ntawm cov qauv thiab cov yam ntxwv ib puag ncig. Txhua hom xim pleev tsev - txawm tias rau sab nraud uas ruaj khov, tiv thaiv xeb, lossis ua tiav tshwj xeeb - xav tau kev tsom qhov ceev kom raug rau kev ua tau zoo tshaj plaws thaum lub sijhawm thov thiab siv kawg.
Cov Kev Sib Tw Tswj Kev Ceev Tshwj Xeeb rau Cov Xim Tsev
Qhov sib txawv ntawm BA/MMA piv cuam tshuam rau cov qauv sab hauv ntawm lub network polymer. Cov qib MMA siab txhim kho qhov nyuaj thiab dej tsis nkag, uas yog qhov tseem ceeb rau cov txheej txheem ruaj khov thiab kev tiv thaiv hlau, tab sis tib lub sijhawm ua rau qhov kub hloov pauv iav (Tg) nce thiab hloov cov khoom me me. Cov kev hloov pauv no ua rau nws nyuaj rau khaws cov emulsion ceev hauv cov kev txwv nruj, tshwj xeeb tshaj yog txij li thaum tsis tiav copolymerization tawm cov monomers seem uas tsis tuaj yeem kwv yees tau qhov ceev thiab ruaj khov, muaj kev pheej hmoo ntawm qhov tsis zoo hauv kev npog thiab kev nplaum.
Qhov sib xws ntawm cov xim thiab cov khoom sau, uas tseem ceeb rau kev tsim xim thiab lub zog zais, ua rau kev tswj qhov ceev nyuaj dua. Piv txwv li, rutile titanium dioxide thiab calcium carbonate, uas feem ntau siv rau hauv cov qauv tsim vaj tsev, muaj qhov ceev ntau dua li cov acrylic matrix dej. Kev tawg tsis sib xws lossis kev tsis sib xws ua rau muaj kev hloov pauv ntawm qhov ceev ntawm cov khoom sib xyaw ua ke thiab ua rau muaj kev phom sij rau kev ruaj khov ntawm cov emulsion thaum lub sijhawm khaws cia.
Kev xaiv cov tshuaj surfactant thiab kev sib sau ua ke tseem yog lwm yam uas hloov pauv tau. Cov tshuaj surfactants ua rau cov khoom sib xyaw ruaj khov tab sis kuj tseem cuam tshuam rau qhov loj ntawm cov khoom me me ntawm cov polymer thiab kev sib cuam tshuam ntawm dej thiab polymer, ob qho tib si uas ua rau cov khoom loj. Kev hloov me me hauv cov dej zoo lossis cov khoom xyaw uas muab los ntawm cov khoom sib xyaw ua ke tuaj yeem ua rau muaj qhov sib txawv ntawm cov khoom emulsion, ua rau kev rov ua dua yog qhov nyuaj heev - qhov teeb meem loj zuj zus hauv cov chaw tsim khoom loj.
Kev Xav Tau Tshwj Xeeb Rau Ib Puag Ncig Thiab Daim Ntawv Thov
Kev raug rau ib puag ncig ua rau muaj kev cuam tshuam rau kev tswj qhov ntom ntom. Cov av noo ntau thaum lub sijhawm ziab ua rau cov dej ua pa ntev dua, ua rau qhov ntom ntom tsawg dua thiab cuam tshuam rau kev sib koom ua ke ntawm cov zaj duab xis. Ntawm qhov tod tes, qhov kub siab ua rau cov dej ua pa sai dua, ua rau cov zaj duab xis tuab dhau uas ua rau tawg lossis tsis zoo. Tej huab cua hauv cheeb tsam yuav xav tau kev hloov kho cov qauv, ua rau muaj kev xav tau kev ntsuas lub sijhawm tiag tiag thiab kev tswj hwm cov txheej txheem thoob plaws hauv cov txheej txheem tsim xim.
Cov Tswv Yim Rau Qhov Ceev Zoo Tshaj Plaws Nruab Nrab Ntawm Cov Kev Hloov Pauv Ua Ib Pawg Thiab Cov Nplai
Cov xim pleev tsev zoo thiab sib xws yuav tsum muaj ntau txoj hauv kev:
- Kev Tswj Xyuas Cov Txheej TxheemKev tswj qhov kub thiab txias ntawm lub reactor, qhov siab, thiab qib shear txo qhov tsis sib xws ntawm cov khoom sib xyaw. Cov reactors siab heev uas muaj kev tswj hwm nruj ntawm kev sib xyaw thiab kev ntsuas tshuaj ua rau muaj kev sib xyaw ua ke zoo dua thiab txo qhov ceev ntawm kev hloov pauv.
- Kev Ntsuas Khoom Siv Raw ZooCov txheej txheem ntsuas tsis siv neeg txuas nrog cov ntsuas qhov ceev ntawm cov kua dej tiag tiag, xws li Lonnmeter, tso cai rau kev hloov kho ncaj qha los ntawm kev tawm tswv yim. Kev ntsuas qhov ceev tsis tu ncua ua rau kev kho qhov ceev ntawm cov xim lossis cov khoom ntxiv sai sai, kom ntseeg tau tias qhov ceev tseem nyob hauv cov lus qhia ntawm cov khoom thaum lub sijhawm sib tsoo thiab kev sib kis.
- Kev Tswj Xyuas Zoo thiab Cov Ntaub Ntawv Uas Nrov NrovKev siv cov kev ntsuas qhov ceev txheem—uas Lonnmeter nyeem tau hauv kab—thoob plaws cov pawg pab nrhiav pom qhov sib txawv thaum ntxov. Kev sib piv cov ntaub ntawv no txhawb nqa kev tshuaj xyuas qhov ua rau muaj qhov tsis sib xws ntawm qhov ceev, txawm tias yog vim qhov sib txawv ntawm cov khoom siv raw, qhov zoo ntawm dej, lossis cov xwm txheej ntawm cov khoom siv.
- Kev Kho Kom Zoo Dua ntawm Cov QauvKev hloov kho qhov piv ntawm cov coalescents, fillers, lossis surfactants tuaj yeem kho qhov viscosity thiab density, them rau qhov tsis zam tau qhov sib txawv ntawm ib pawg mus rau ib pawg hauv cov qauv polymer network.
Ua piv txwv, cov xim pleev tsev uas ci ntsa iab nruab nrab uas tsim los rau huab cua noo yuav xav tau kev sib npaug ntawm MMA-nplua nuj copolymer rau kev tiv thaiv dej, cov neeg sawv cev ntub ntxiv rau kev sib xws ntawm cov xim, thiab kev saib xyuas zoo hauv kab. Txhua qhov kev hloov pauv ntawm cov txheej txheem - xws li kev ntxhov siab ntau ntxiv lossis kev muab cov tshuaj surfactant tshiab - yuav raug txheeb xyuas los ntawm kev nyeem cov ntaub ntawv ceev nrooj tiag tiag, ua rau muaj kev hloov kho ua ntej cov khoom tiav thiab ntim khoom.
Kev ua kom zoo dua cov txheej txheem hauv kev tsim cov xim tsis yog tsuas yog hais txog thev naus laus zis xwb tab sis kuj yog hais txog kev txhais cov ntaub ntawv ceev ceev mus rau hauv cov kev cuam tshuam uas ua tau. Los ntawm kev sib xyaw ua ke ntawm cov txheej txheem tsim khoom siab heev ntawm cov txheej txheem pleev xim, kev tswj cov khoom siv raw zoo, thiab kev tswj hwm cov xim emulsion zoo hauv lub sijhawm tiag tiag, cov neeg tsim khoom tuaj yeem txo qhov teeb meem nyuaj ntawm kev ruaj khov ceev ceev uas yog qhov tseem ceeb rau kev ua tau zoo ntawm cov xim pleev tsev thiab kev ntseeg tau.
Cov Lus Nug Feem Ntau (FAQs)
Qhov tseem ceeb ntawm Butyl Acrylate hauv cov qauv pleev xim rau vaj tse yog dab tsi?
Butyl Acrylate yog qhov tseem ceeb rau cov xim pleev tsev vim nws muaj peev xwm ua kom muaj kev ywj pheej thiab kev tawv ntawm cov txheej. Nws qhov kub hloov iav qis ua rau cov zaj duab xis xim tseem yoog tau ntawm qhov kub qis, txo qhov yuav tawg nrog kev txav ntawm cov khoom siv thiab kev hloov pauv ntawm qhov kub. Cov yam ntxwv no pab tsim cov txheej uas kav ntev, ruaj khov uas muaj peev xwm tiv taus kev ntxhov siab ntawm huab cua. Butyl Acrylate kuj tseem yog qhov tseem ceeb hauv kev tsim cov xim pleev dej-VOC qis, sib npaug kev ua tau zoo thiab kev ua raws li ib puag ncig los ntawm kev txhawb nqa kev tiv thaiv huab cua yam tsis muaj kev txi cov zaj duab xis lossis kev siv nyiaj tsawg. Piv txwv li, cov xim pleev phab ntsa sab nraud nrog Butyl Acrylate tswj tau qhov sib txuas zoo dua thiab kev ruaj khov zoo nkauj piv rau lwm cov uas tsis yog BA.
Methyl Methacrylate pab txhawb rau cov txheej txheem tsim xim li cas?
Methyl Methacrylate ua rau muaj kev txhim kho zoo rau qhov tawv thiab ruaj khov ntawm cov xim thaum siv ua ib qho comonomer hauv emulsion polymerizations. Nws suav nrog hauv cov qauv ua rau qhov tawv thiab lub zog ntawm cov xim pleev xim kawg nce ntxiv, ua kom tsis txhob muaj kev sib txhuam, khawb, thiab hnav. Cov khoom no tseem ceeb rau cov chaw muaj neeg coob lossis cov txheej sab nraud uas qhov kev ua tau zoo ntawm qhov chaw ntev yog qhov tseem ceeb. Thaum copolymerized nrog cov monomers softer xws li Butyl Acrylate, Methyl Methacrylate muab kev sib npaug ntawm kev ywj pheej thiab lub zog, uas yog qhov tseem ceeb rau ob qho tib si sab hauv thiab sab nraud architectural xim.
Vim li cas kev ntsuas qhov ceev ntawm cov emulsion thiaj li tseem ceeb hauv cov txheej txheem tsim khoom lag luam xim?
Kev ntsuas qhov ceev ntawm cov emulsion yog qhov tseem ceeb rau kev tswj kom zoo ib yam hauv kev tsim xim. Qhov ceev txiav txim siab qhov sib kis ntawm cov xim, kev npog, viscosity, thiab kev ruaj khov ntawm cov khoom tiav. Kev hloov pauv me me tuaj yeem ua rau cov zaj duab xis tsis zoo, pom qhov tsis zoo, lossis cov khoom khaws cia tsis ruaj khov, thaum kawg ua rau cov neeg siv tsis txaus siab. Kev ntsuas qhov ceev ntawm ntau theem tsim khoom ua kom ntseeg tau tias cov khoom ua tau raws li cov qauv zoo thiab ua tau zoo thoob plaws cov txheej txheem siv xim.
Kev ntsuas qhov ceev tiag tiag thiab cov ntsuas qhov ceev ntawm cov kua dej ua lub luag haujlwm dab tsi hauv kev tsim xim niaj hnub?
Kev ntsuas qhov ceev tiag tiag ua rau cov txheej txheem tsim xim yooj yim dua los ntawm kev muab cov lus teb tsis tu ncua, tsis siv neeg ntawm cov yam ntxwv emulsion ncaj qha thaum lub sijhawm sib tov, kev tawg, thiab kev pleev xim. Cov ntsuas qhov ceev hauv kab, xws li cov uas tsim los ntawm Lonnmeter, ntes tau qhov sib txawv ntawm qhov ceev ceev sai thiab ua rau muaj kev kho tam sim ntawd, txo qhov sib txawv ntawm ib pawg mus rau ib pawg, pov tseg, thiab qhov xav tau kev kuaj tes. Qhov no ua rau cov voj voog tsim khoom sai dua, txo cov khoom siv tsis raws li qhov xav tau, thiab txo qis kev siv peev txheej hauv cov txheej txheem tsim khoom lag luam xim.
Kev ntsuas qhov ntom ntawm cov emulsion puas tuaj yeem cuam tshuam rau kev lag luam thiab kev ua tau zoo ntawm kev tsim xim?
Kev tswj qhov ceev ntawm cov emulsion pab kom zoo tshaj plaws kev siv cov khoom siv tseem ceeb, txo cov khib nyiab thiab kev siv dej ntau dhau, cov xim, thiab cov khoom khi. Kev txo qis kev hloov pauv ntawm cov txheej txheem thiab kev siv rov qab ua haujlwm zoo txo kev siv zog ntau lawm, cov nqi them ua haujlwm, thiab cov pa phem ib puag ncig. Kev txhim kho cov khoom tsim tau zoo dua thiab txo cov xim seem txo qis qhov cuam tshuam ntawm ecological, ua raws li kev cai lij choj thiab kev ruaj khov hauv kev lag luam.
Cov txheej txheem tsim xim feem ntau raug kho kom zoo li cas rau kev ua haujlwm zoo thiab zoo?
Kev tsim xim tau zoo tshaj plaws los ntawm kev sib xyaw ua ke ntawm kev ntsuas cov khoom xyaw tsis siv neeg, kev saib xyuas cov khoom tiag tiag los ntawm kev ntsuas qhov ceev hauv kab, thiab cov txheej txheem teb rov qab kaw. Txoj hauv kev sib koom ua ke no tswj hwm qhov kev kam rau siab rau qhov ceev, viscosity, thiab lwm yam khoom tseem ceeb, ua kom ntseeg tau tias muaj cov zis zoo nrog kev cuam tshuam tsawg dua. Kev saib xyuas tas mus li txwv tsis pub muaj kev hloov pauv ntawm cov khoom thiab ua kom sai dua qhov kev kuaj pom ntawm cov xwm txheej tsis raws cai, txhawb nqa kev ntseeg siab ntawm cov khoom thiab kev ua tus qauv.
Cov yam ntxwv twg tseem ceeb rau kev ruaj khov ntawm cov dej-raws li acrylic emulsions rau cov xim pleev xim?
Yuav kom lav tau qhov ruaj khov ntawm cov emulsion mus sij hawm ntev, yuav tsum tau tswj hwm pH, kub, thiab qhov loj ntawm cov khoom me me kom zoo, nrog rau kev saib xyuas qhov ceev ntawm cov emulsion. Qhov tsis ruaj khov lossis qhov sib txawv ntawm qhov ceev tsis tau xav txog tuaj yeem ua rau muaj kev sib sau ua ke, kev sib cais theem, lossis kev sib tov tsis raug - ua rau kev ua haujlwm ntawm cov xim tsis zoo. Kev tswj cov kev ntsuas no tiv thaiv kev tso dej, txhawb nqa lub sijhawm khaws cia sib xws, thiab tswj hwm qhov zoo ntawm cov xim pleev tsev thoob plaws kev khaws cia thiab kev siv.
Cov txheej txheem ua ntau yam los yog cov txheej txheem txuas ntxiv puas zoo dua rau kev tsim xim emulsion?
Cov txheej txheem txuas ntxiv mus feem ntau ua rau muaj kev ua haujlwm zoo dua thiab cov khoom sib xws vim muaj cov khoom siv tas li thiab kev saib xyuas tas li, ua rau muaj kev tsim cov xim pleev tsev loj thiab raws li tus qauv. Txawm li cas los xij, kev ua cov khoom ntau ntau tseem nyiam rau cov kev khiav me me lossis cov qauv tshwj xeeb uas xav tau kev ywj pheej thiab kev kuaj xyuas zoo ntawm tus kheej. Kev ua haujlwm txuas ntxiv mus txo cov neeg ua haujlwm, txo cov chaw ua haujlwm, thiab txo cov kev siv hluav taws xob, thaum cov txheej txheem ntau ntau ua rau cov qauv tsim tshwj xeeb thiab hloov pauv sai ntawm cov hom khoom.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-19-2025
