Cov yam ntxwv tseem ceeb ntawm hydroxyethyl cellulose yog tias nws yaj tau hauv dej txias thiab dej kub, thiab tsis muaj cov yam ntxwv gelling. Nws muaj ntau yam kev hloov pauv, solubility thiab viscosity, nag lossis daus. Hydroxyethyl cellulose kua tuaj yeem tsim cov zaj duab xis pob tshab, thiab muaj cov yam ntxwv ntawm hom tsis-ionic uas tsis cuam tshuam nrog ions thiab muaj kev sib raug zoo.
① Kub thiab yaj tau hauv dej: Piv nrog methyl cellulose (MC), uas tsuas yaj tau hauv dej txias xwb, hydroxyethyl cellulose tuaj yeem yaj hauv dej kub lossis dej txias. Ntau yam kev yaj thiab viscosity, thiab tsis yog thermal gelation.
②Kev tiv thaiv ntsev: Vim nws hom tsis-ionic, nws tuaj yeem nyob ua ke nrog lwm cov polymers uas yaj hauv dej, surfactants thiab ntsev ntau yam. Yog li ntawd, piv nrog ionic carboxymethyl cellulose (CMC), hydroxyethyl cellulose muaj kev tiv thaiv ntsev zoo dua.
③Kev khaws dej, kev sib npaug, kev tsim zaj duab xis: nws lub peev xwm khaws dej yog ob npaug ntawm methyl cellulose, nrog kev tswj hwm kev ntws zoo heev thiab kev tsim zaj duab xis zoo heev, txo cov kua dej poob, sib xyaw ua ke, kev tiv thaiv kev sib deev colloid.
Kev siv hydroxyethyl cellulose
Hydroxyethyl cellulose yog cov khoom lag luam cellulose ether uas tsis yog ionic thiab yaj tau hauv dej, siv dav hauv kev tsim kho vaj tse, roj av, polymer polymerization, tshuaj, siv txhua hnub, ntawv thiab kua mem, ntaub, ceramics, kev tsim kho, kev ua liaj ua teb thiab lwm yam lag luam. Nws muaj cov haujlwm ntawm kev ua kom tuab, kev sib txuas, emulsifying, dispersing thiab stabilizing, thiab tuaj yeem khaws dej, tsim ib zaj duab xis thiab muab cov nyhuv colloid tiv thaiv. Nws yooj yim yaj hauv dej txias thiab dej kub, thiab tuaj yeem muab cov tshuaj nrog ntau yam viscosity. Ib qho ntawm cov cellulose ethers ceev tshaj plaws.
1 xim latex
Hydroxyethyl cellulose yog cov khoom siv ua kom tuab feem ntau siv rau hauv cov txheej txheej latex. Ntxiv rau kev ua kom cov txheej txheej latex tuab, nws kuj tseem tuaj yeem ua kom emulsify, tawg, ruaj khov thiab khaws cia dej. Nws muaj cov yam ntxwv los ntawm kev ua kom tuab zoo kawg nkaus, kev tsim xim zoo, cov khoom tsim zaj duab xis thiab kev ruaj khov cia. Hydroxyethyl cellulose yog cov khoom siv cellulose tsis-ionic uas tuaj yeem siv rau hauv ntau yam pH. Nws muaj kev sib raug zoo nrog lwm cov ntaub ntawv hauv cov khoom (xws li cov xim, cov khoom ntxiv, cov khoom sau thiab ntsev). Cov txheej txheej uas tuab nrog hydroxyethyl cellulose muaj rheology zoo ntawm ntau qhov nrawm shear thiab yog pseudoplastic. Cov txheej txheem tsim kho xws li txhuam, txheej txheej roller, thiab txau tuaj yeem siv tau. Kev tsim kho zoo, tsis yooj yim rau drip, sag thiab splash, thiab leveling zoo.
2 Kev Ua Kom Polymerization
Hydroxyethyl cellulose muaj cov haujlwm ntawm kev tawg, emulsifying, suspending thiab stabilizing hauv cov khoom polymerization lossis copolymerization ntawm cov resins hluavtaws, thiab tuaj yeem siv ua colloid tiv thaiv. Nws yog tus cwj pwm los ntawm kev muaj peev xwm tawg muaj zog, nyias "zaj duab xis" ntawm cov khoom me me, cov khoom me me, cov duab sib xws, hom xoob, zoo fluidity, khoom pob tshab siab thiab yooj yim ua. Vim tias hydroxyethyl cellulose tuaj yeem yaj hauv dej txias thiab dej kub, thiab tsis muaj qhov kub gelling, nws yog qhov tsim nyog dua rau ntau yam kev cuam tshuam polymerization.
Cov khoom siv tseem ceeb uas yuav tsum tau siv los tshawb nrhiav qhov zoo ntawm cov tshuaj dispersant yog qhov nro ntawm qhov chaw (lossis interfacial), lub zog ntawm interfacial thiab qhov kub ntawm nws cov kua dej. Cov khoom no ntawm hydroxyethyl cellulose yog qhov tsim nyog rau kev polymerization lossis copolymerization ntawm cov resins hluavtaws.
Hydroxyethyl cellulose muaj kev sib raug zoo nrog lwm cov cellulose ethers uas yaj hauv dej thiab PVA. Lub kaw lus sib xyaw ua ke no tuaj yeem tau txais txiaj ntsig zoo ntawm kev kawm los ntawm ib leeg lub zog thiab ua kom tiav qhov tsis muaj zog. Cov khoom sib xyaw ua ke tsis yog tsuas yog muaj qhov zoo xwb, tab sis kuj txo cov khoom poob.
3 kev khawb roj
Hauv kev khawb roj thiab kev tsim khoom, hydroxyethyl cellulose uas muaj viscosity siab feem ntau yog siv los ua viscosifier rau cov kua ua tiav thiab cov kua ua tiav. hydroxyethyl cellulose uas muaj viscosity qis yog siv los ua cov kua txo qhov poob. Hauv ntau yam av nkos uas xav tau rau kev khawb, kev ua tiav, kev sib xyaw ua ke thiab kev ua haujlwm tawg, hydroxyethyl cellulose yog siv los ua cov khoom tuab kom tau txais qhov fluidity zoo thiab ruaj khov ntawm cov av nkos. Thaum lub sijhawm khawb, nws tuaj yeem txhim kho lub peev xwm nqa xuab zeb ntawm cov av nkos thiab ua kom lub sijhawm ua haujlwm ntev dua. Hauv cov kua ua tiav theem qis thiab cov kua sib xyaw ua ke, cov khoom zoo heev ntawm hydroxyethyl cellulose tuaj yeem tiv thaiv cov dej ntau los ntawm kev nkag mus rau hauv cov roj txheej los ntawm cov av nkos, thiab tuaj yeem txhim kho lub peev xwm tsim khoom ntawm cov roj txheej.
4 Cov tshuaj lom neeg txhua hnub
Hydroxyethylcellulose yog ib qho ua tau zoo ntawm cov yeeb yaj kiab, cov khoom siv khi, cov khoom ua kom tuab, cov khoom ruaj khov thiab cov khoom tawg hauv cov tshuaj zawv plaub hau, cov tshuaj tsuag plaub hau, cov tshuaj ua kom tsis muaj zog, cov tshuaj pleev ib ce thiab cov tshuaj pleev ib ce; hauv cov hmoov ntxuav khaub ncaws nws yog ib qho tshuaj ntxuav av. Hydroxyethyl cellulose yaj sai sai ntawm qhov kub siab, uas tuaj yeem ua kom cov txheej txheem ntau lawm sai dua thiab txhim kho kev ua haujlwm ntau lawm. Qhov pom tseeb ntawm cov tshuaj ntxuav khaub ncaws uas muaj hydroxyethyl cellulose yog tias nws tuaj yeem txhim kho qhov du thiab mercerization ntawm cov ntaub.
5 lub tsev tsim qauv
Hydroxyethyl cellulose siv tau rau hauv cov khoom siv hauv kev tsim kho xws li cov sib tov ua vaj tse, cov mortar tshiab, gypsum plaster lossis lwm yam mortars, thiab lwm yam, kom khaws dej thaum lub sijhawm tsim kho ua ntej lawv teeb thiab tawv. Ntxiv nrog rau kev txhim kho kev khaws dej ntawm cov khoom siv hauv kev tsim kho, hydroxyethyl cellulose kuj tseem tuaj yeem ua kom ntev lub sijhawm kho thiab qhib ntawm stucco lossis mastic. Txo cov tawv nqaij, kev plam thiab sagging. Qhov no tuaj yeem txhim kho kev ua haujlwm ntawm kev tsim kho, txhim kho kev ua haujlwm zoo, txuag lub sijhawm, thiab tib lub sijhawm nce qhov ntim nthuav dav ntawm stucco, yog li txuag cov khoom siv raw.
6 kev ua liaj ua teb
Hydroxyethyl cellulose siv rau hauv cov tshuaj tua kab emulsion thiab cov tshuaj ncua ua ib qho thickener rau cov tshuaj tsuag emulsions lossis cov tshuaj ncua. Nws tuaj yeem txo qhov drift ntawm tus neeg sawv cev thiab ua rau nws lo rau ntawm cov nplooj ntawm cov nroj tsuag, yog li ua rau cov txiaj ntsig ntawm kev tsuag nplooj ntau ntxiv. Hydroxyethyl cellulose kuj tseem siv tau ua tus neeg sawv cev ua zaj duab xis hauv cov txheej noob thiab cov tshuaj txheej; ua tus neeg sawv cev thiab tus neeg sawv cev ua zaj duab xis hauv kev rov ua dua ntawm cov nplooj luam yeeb.
7 Daim Ntawv thiab Kua Mis
Hydroxyethyl cellulose siv tau ua tus neeg sawv cev rau qhov loj ntawm daim ntawv thiab cov ntawv ntoo thiab ua tus neeg sawv cev ua kom tuab thiab dai rau cov kua mem uas muaj dej. Hauv cov txheej txheem ua ntawv, cov khoom zoo tshaj plaws ntawm hydroxyethyl cellulose suav nrog kev sib raug zoo nrog feem ntau cov pos hniav, cov resins thiab cov ntsev inorganic, ua npuas tsawg, siv oxygen tsawg thiab muaj peev xwm tsim cov zaj duab xis du. Cov zaj duab xis muaj qhov nkag tau ntawm qhov chaw qis dua thiab ci ntsa iab dua, thiab tseem tuaj yeem txo cov nqi. Cov ntawv loj nrog hydroxyethyl cellulose rau cov ntawv luam tawm zoo. Hauv kev tsim cov kua mem uas muaj dej, cov kua mem uas muaj dej uas muaj hydroxyethyl cellulose tuab yuav qhuav sai, muaj xim sib kis zoo, thiab tsis ua rau lo.
8 daim ntaub
Nws siv tau ua tus binder thiab sizing agent hauv kev luam ntawv thiab zas xim thiab xim latex; thickener rau sizing cov ntaub ntawv nyob rau sab nraum qab ntawm daim ntaub pua plag. Hauv cov iav fiber, nws siv ua tus neeg sawv cev molding thiab binder; hauv tawv pulp, nws siv tau ua modifier thiab binder. Muab ntau yam viscosity rau cov coatings lossis adhesives no, ua rau cov txheej txheej sib npaug thiab sai dua thiab txhim kho kev luam ntawv meej.
9 lub tshuab ua los ntawm av nplaum
Cov khoom siv khi ua kom muaj zog rau kev tsim cov khoom siv ceramics.
10 tshuaj txhuam hniav
Nws siv tau ua ib qho thickener hauv kev tsim cov tshuaj txhuam hniav.
Lub sijhawm tshaj tawm: Cuaj hlis-24-2022