Cellulose Ether Classification
Cellulose ether yog cov ntsiab lus dav dav rau cov khoom lag luam uas tsim los ntawm cov tshuaj tiv thaiv ntawm alkali cellulose thiab etherifying tus neeg sawv cev nyob rau hauv qee yam mob. Thaum alkali cellulose hloov los ntawm cov etherifying agents, txawv cellulose ethers yuav tau.
Raws li cov khoom ionization ntawm cov khoom hloov, cellulose ethers tuaj yeem muab faib ua ob pawg: ionic (xws li carboxymethyl cellulose) thiab nonionic (xws li methyl cellulose).
Raws li hom kev hloov pauv, cellulose ether tuaj yeem muab faib ua monoether (xws li methyl cellulose) thiab sib xyaw ether (xws li hydroxypropyl methyl cellulose).
Raws li qhov sib txawv solubility, nws tuaj yeem muab faib ua dej solubility (xws li hydroxyethyl cellulose) thiab organic solvent solubility (xws li ethyl cellulose).
Cov dej-soluble cellulose ethers siv nyob rau hauv qhuav-mixed mortars muab faib ua instant-dissolving thiab nto-kho ncua-dissolving cellulose ethers.
Lawv qhov txawv qhov twg? Thiab yuav ua li cas kom haum nws rau hauv 2% aqueous tov rau viscosity kuaj?
Kev kho qhov chaw yog dab tsi?
Qhov cuam tshuam rau cellulose ether?
ua ntej
Kev kho deg yog ib txoj hauv kev tsim cov txheej txheej saum npoo ntawm cov khoom siv nrog cov khoom siv kho tshuab, lub cev thiab tshuaj lom neeg sib txawv ntawm lub hauv paus.
Lub hom phiaj ntawm kev kho deg ntawm cellulose ether yog ncua sij hawm ntawm kev sib txuas ntawm cellulose ether nrog dej kom ua tau raws li qhov yuav tsum tau ua qeeb qeeb ntawm qee cov xim mortars, thiab tseem yuav ua rau kom cov corrosion kuj ntawm cellulose ether thiab txhim kho kev ruaj ntseg cia.
Qhov sib txawv thaum dej txias tau teeb tsa nrog 2% aqueous tov:
Qhov chaw kho cellulose ether tuaj yeem tawg sai sai hauv dej txias thiab tsis yooj yim rau agglomerate vim nws cov viscosities qeeb;
Cellulose ether yam tsis muaj kev kho deg, vim nws cov viscosities ceev, yuav khov ua ntej nws yuav tawg tag nrho hauv dej txias, thiab nws yooj yim rau agglomeration.
Yuav ua li cas rau configure lub non-nto-kho cellulose ether?
1. Ua ntej muab tso rau hauv ib qho nyiaj uas tsis yog-nto kho cellulose ether;
2. Tom qab ntawd ntxiv dej kub ntawm li 80 degrees Celsius, qhov hnyav yog ib feem peb ntawm cov dej ntim uas yuav tsum tau, kom nws tuaj yeem o thiab tawg;
3. Tom ntej no, maj mam hliv rau hauv dej txias, qhov hnyav yog ob feem peb ntawm cov dej seem uas yuav tsum tau, stirring kom nws nplaum maj mam, thiab yuav tsis muaj agglomeration;
4. Thaum kawg, nyob rau hauv cov xwm txheej ntawm qhov hnyav sib npaug, muab tso rau hauv qhov dej kub tsis tu ncua kom txog rau thaum qhov kub thiab txias poob mus rau 20 degrees Celsius, thiab tom qab ntawd qhov ntsuas viscosity tuaj yeem ua tiav!
Post lub sij hawm: Feb-02-2023