Nyob rau hauv cap, cellulose ether ua lub luag haujlwm ntawm dej khaws cia, thickening, ncua cement hwj chim, thiab txhim kho kev tsim kho. Cov dej ua kom zoo ua rau muaj kev nthuav dav ua tiav, tuaj yeem txhim kho viscosity ntawm lub zog ntub dej ntawm cug, thiab kho lub sijhawm. Ntxiv cov cellulose ether rau cov tshuab txau muab tshuaj yuav txhim kho cov txau lossis nqus ntawm lub cug. Cellulose tau siv dav ua qhov tseem ceeb ntxiv rau hauv kev npaj-sib xyaw. Noj daim teb ntawm cov ntaub ntawv tsim tsev ua piv txwv, Cellulose ether muaj cov khoom zoo xws li thickening, dej tuav, thiab rov qab. Yog li ntawd, tsev cov khoom siv qib pes me me ether yog siv tau los txhim kho ntawm cov tshuaj khib nyiab thiab cov xim qhuav), muab cov xim yas, thiab lwm yam, suav nrog kev ua tau zoo ntawm Cov khoom siv tsev.
Cellulose tuaj yeem ncua cov txheej txheem hydration ntawm cov cement. Cellulose ether Yuav cug nrog ntau yam tshuaj ntsuab, thiab kuj txo qhov kev ua kom dej sov thiab qeeb cov txheej txheem kev ua kom zoo nkauj ntawm cov cement. Qhov no tsis zoo rau kev siv tshuaj khib hauv cov cheeb tsam txias. Qhov kev ua tau zoo no tshwm sim los ntawm cov adsorption ntawm cellulose ether molecules ntawm cov khoom siv dej xws li CSH thiab Ca (Oh) 2. Vim tias qhov nce nyob rau hauv viscosity ntawm cov kab viscosity ntawm cov kab viscosity, lub cellulose ither txo lub ions hauv kev daws teeb meem, yog li ncua cov txheej txheem hydration. Qhov siab dua ntawm cellulose ntawm cellulose ntawm cellulose ntawm cov ntxhia cov khoom, ntau tshaj tawm cov nyhuv qeeb. Cellulose ether tsis tsuas yog chaw teeb tsa, tab sis kuj tseem noj cov txheej txheem tawv ntawm cov txiv neej collftion zog. Kev ua kom raug retarding cov nyhuv ether nyob ntawm tsis tsuas yog nyob ntawm nws cov kev xav hauv cov qauv ntxhia, tab sis kuj nyob rau cov qauv tshuaj. Qhov siab dua qib ntawm methylation ntawm HEMC, qhov zoo dua cov nyhuv retarding ntawm cellulose ether. Qhov sib piv ntawm Hydrophilic hloov chaw rau kev ua kom muaj kev nce qib kom rov ua kom muaj zog dua. Txawm li cas los xij, lub viscosity ntawm cellulose ether muaj me ntsis nyhuv rau Minas hulation kinetics.
Nrog kev nce ntawm cov ntsiab lus ntawm hydroxypropyl methylculose ether, lub sij hawm teeb lub sij hawm ntawm lub tshuaj khib nce ntau. Muaj ib qho kev sib txheeb zoo tsis zoo ntawm qhov pib teeb tsa lub sijhawm tshuaj khib thiab cov kab cellule ether, thiab cov ntsiab lus zoo ntawm lub sijhawm kawg thiab cov ntsiab lus ntawm cellulose ether. Peb tuaj yeem tswj lub sijhawm ua haujlwm ntawm lub tshuaj khib los ntawm kev hloov tus nqi ntawm cellulose ether.
Lub sij hawm Post: Mar-09-2023