Hauv kev siv ntawm HydroxyPropy kasthyl celluloseHPMC, peb feem ntau pom tias nws yog muab faib ua ob hom: tam sim thiab maj mam sib cais. Cia peb nkag siab qhov sib txawv ntawm kev sib txawv sai thiab ua kom qeeb ntawm hydroxyprropy kasthyl cellulose.
Instant HPMC yog hais txog kev siv cov neeg sawv cev hla kev sib txuas rau cov dej txias, yog li HPMC tau sai sai, yog li maj mam tawg, uas yog, kev sib cais;
Qeeb Ampuble HPMC tseem tuaj yeem hu tau cov khoom kub kub yaj. Thaum cov dej txias tau ntsib, nws tuaj yeem nrawm nrawm hauv dej kub. Los ntawm stirring tusyees, qhov ntsuas kub ntawm kev daws yuav poob rau ib qho kub. (Qhov kub ntawm peb cov gel muaj txog 60 ° C) ° yuav tshwm sim maj mam txog thaum pob tshab thiab lo nplaum tau tsim.
Ntawm no yog qhov sib txawv ntawm kev daws teeb meem tam sim ntawd thiab kev daws teeb meem qeeb. Yog koj muaj lus nug txog cov kev paub no, koj tuaj yeem sab laj peb.
HydroxyPropyyl Methylropyl cellulose HPMC qeeb Maas Coulation
Ntxiv rau HydroxyPropy kasthyl cellulose rau cov cement qeeb qeeb cia nws cov hydration. Yog li dab tsi koj paub txog nws ua haujlwm li cas? Cia saib ntawm hydroxypropyl methyl cellulose kom ncua coas illation. Txoj ntsiab cai.
1. Ion Dag Kev Mob Nkuaj
Peb xav tias hydroxypropal methylropy cellulose yuav nce viscosity ntawm cov kev daws teeb meem, tabkaum tus nqi ntawm ionic txav, thiab ncua kev hydration ntawm cov cement. Txawm li cas los xij, qhov qis viscosity cellibos neeg muaj kev ntseeg nyob hauv qhov kev ntsuas no tau muaj lub peev xwm muaj zog kom ncua kev ua kom dej xis. Yog li ntawd, qhov kev xav no tsis raug. Pegchez li al. kuj ntseeg tias cov kev xav no. Qhov tseeb, lub sijhawm ntawm ion tsiv teb tsaws lossis tsiv teb tsaws yog luv heev, thaj tsis cuam tshuam txog kev ncua ntawm cov txiv neej.
2. Alkaline Dem
Polysaccharidide Nyeem me ntsis nyob rau hauv Alkaline cov xwm txheej los tsim hydroxyl carboxylic acids uas ncua coaszylic hydroas. Yog li ntawd, lub sijhawm co ntawm hydroxypropyl cellulose yuav yog vim nws degradation yuav yog vim muaj alkaline slurries los tsim hydroxycarboxylic acids. Txawm li cas los xij, PourCHEZ li al. Pom tias cov kws kho mob cellulose tau ruaj khov nyob rau hauv Alkaline tej yam kev mob, degradation tsuas yog me ntsis, thiab cov khoom lag luam muaj cov nyhuv me me ntawm kev ua kom muaj dej xis.
3, adsorption
Adsorption tuaj yeem yog HydroxyPropy cellulose Thaiv coaszent cov khoom siv thiab cov khoom siv hlau, yog li kom ncua kev hydration thiab hws ntawm cov cement. Pegchez li al. Pom tias cov kws kho mob cellulose tau qhia meej ntxiv tias yog cov khoom lag luam hydroxide, cawb thiab calcium altringite ettringite thiab theem tsis zoo. Ntxiv mus, nyob rau hauv cov ntaub ntawv etherulose ether, adsorption muaj peev xwm ntawm HEC muaj zog tshaj qhov o ntawm o mc. Qhov qis dua cov ntsiab lus ntawm hydroxyethyl hauv Hec lossis Hydroxypropyl hauv HPMC, qhov muaj zog dua adceorment muaj peev xwm muaj zog tshaj li CSH. Kev tshawb xyuas ntxiv kuj pom tias qhov muaj peev xwm adsorption ntawm cov kev kawm ntawm cov kab ke ether ether yog tsis muaj zog, tab sis qhov no tseem ceeb qeeb. Cellulose ether ntawm tricalcium muaj qhov muaj txiaj ntsig ntawm cov txheej txheem hydration, tab sis kev ncua nyob rau hauv kev daws teeb meem, nws yog ib qho txuas ntxiv ntawm lub cellulose ether. Lig sileve holration txuas ntxiv.
Cov no yog hydroxypropy methyl cellulose ncua sij hawm coaas dej xis. Peb cia siab tias txoj kev paub no yuav ua rau txhua tus kom nkag siab li cas cov khoom ua haujlwm thiab siv nws zoo dua.
Lub Sijhawm Post: Jun-18-2022