Nyob rau hauv npaj-mixed cug, qhov sib ntxiv ntawm hydroxypropyl cellulose HPMC yog qhov kev ua kom loj heev, tab sis nws tuaj yeem txhim kho kev tsim kho ntawm lub tshuaj khib. Cov cellulose muaj kev hais nrog txawv viscosity thiab ntxiv tus nqi muaj qhov cuam tshuam zoo rau kev txhim kho ntawm cug cug. Nyob rau tam sim no, ntau masonry thiab plastering mortars muaj cov khoom tsis zoo, thiab dej sib sib cais tau tshwm sim tom qab ob peb feeb ntawm kev sawv tseem. Dej khaws cia yog ib qho kev ua tau tseem ceeb ntawm methyl cellulose ether, tshwj xeeb yog cov muaj kev kub ntau hauv cov cheeb tsam uas muaj qhov kub nyob sab qab teb, them sai sai rau. Qhov cuam tshuam rau cov dej khaws cov nyhuv qhuav ntawm cov tshuaj khib qhuav xws li HPMC ntxiv, lub hom phiaj ntawm HPMC, lub viscress ntawm cov lus thiab qhov kub ntawm ib puag ncig uas nws siv.
1. Tswvyim ether ether yog cov khoom siv hluav taws xob siab molecular ua los ntawm cov ntaub ntawv kho ntuj los ntawm kev hloov kho cov tshuaj lom neeg. Cellulose ether yog ib qho tseem ceeb ntawm cov cellulose ntuj. Kev tsim cov cellulose ether yog qhov sib txawv los ntawm cov hluavtaws polymers. Nws cov khoom siv tshaj plaws yog cellulose, lub ntuj polymer compound. Vim yog tus qauv tshwj xeeb ntawm cov vaj tse cellulose, cellulose nws tus kheej tsis muaj peev xwm hnov cov neeg sawv cev. Tab sis tom qab tus neeg sawv cev of Tom qab tus neeg sawv cev cev xeeb tub, lwm pawg pab pawg hloov pauv mus rau pab pawg uas yog. Muab cov cellulose ether. Qhov xwm ntawm cellulose ethow nyob ntawm hom, kom muaj nuj nqis thiab xa cov neeg hloov chaw. Kev faib tawm ntawm cov cellulose cov neeg muaj cai los ntawm cov neeg hloov chaw, qib kaum kev, solubility thiab lwm yam kev siv. Raws li hom kev hloov chaw ntawm cov molecular, nws tuaj yeem faib ua monoet thiab sib xyaw ether. HPMC peb feem ntau siv yog sib xyaw ether. HydroxyPropy cellulose ether HPMC yog cov khoom lag luam uas ib feem ntawm cov pab pawg meydroxy thiab lwm feem yog hloov los ntawm hydroxyproproyl. HPMC feem ntau yog siv hauv cov ntaub ntawv hauv tsev, tshuaj, cov chemical, txhua hnub, stabilizer, dispersant, thiab zaj yeeb yaj kiab-forming tus neeg sawv cev.
2.Txhua tseg ntawm cellulose Etaws: Hauv kev tsim cov khoom siv hauv tsev, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov tshuaj cug (collectified cug), nws yog qhov tseem ceeb. Cheebtsam. Lub luag haujlwm tseem ceeb ntawm cov dej-soluble cellulose ether hauv cug cug yog feem ntau hauv peb yam. Ib yog ib qho yog lub peev xwm ua tau zoo, lwm yam yog qhov cuam tshuam ntawm kev sib xyaw thiab thixotrospy ntawm cug, thiab qhov thib peb yog kev sib cuam tshuam nrog cov cement. Cov dej khaws cov nyhuv khaws cia ntawm cellulose cuam tshuam ntawm cov dej cug, cov khoom siv ntawm lub tshuaj khib, thiab lub sijhawm teeb tsa cov khoom siv coagulating. Cov dej ua kom lub cellulose ether nws tus kheej los ntawm solubility thiab lub cev qhuav dej ntawm lub celluligose ether nws tus kheej.
Lub thickening thiab thixotrotropy ntawm cellulopy ether: lub luag haujlwm ntawm cellule ether hews, kev daws teeb meem, kub thiab lwm yam kev mob. Qhov kev daws teeb meem ntawm kev daws teeb meem yog cov khoom tshwj xeeb ntawm alkyl cellulose thiab nws hloov pauv derivatives. Cov yam ntxwv gelation muaj feem xyuam nrog rau qib siab ntawm kev hloov chaw, kev daws teeb meem thiab ntxiv.
Lub zog khaws cia zoo ua rau cov cement ntawm cov tshuaj khib nyiab ntxiv, muaj zog ntxiv ntawm lub tshuaj khib nyiab ntawm lub tshuaj khib, thiab lub sijhawm tuaj yeem hloov kho. Qhov kev sib txuas ntawm cellulose ether rau cov tshuab txau kab txau tuaj yeem txhim kho cov txau lossis nqus cov tshuaj khib, nrog rau lub zog txheej txheem. Yog li ntawd, cellulose ether tau raug siv dav ua qhov tseem ceeb ntxiv nyob rau hauv npaj-mixed.
Lub Sijhawm Post: Dec-16-2021