Hydroxypropyl Methyl Cellulose Fermented

Hydroxypropyl methylcellulose yog siv los ua cov khoom siv raw los tsim cov roj, uas tuaj yeem ua tiav kev siv cov suab thaj, txhim kho kev siv cov khoom siv raw, txo cov seem ntawm cov substrate nyob rau hauv lub fermentation broth, txo tus nqi ntawm kev kho dej khib nyiab, thiab ua tus yam ntxwv mis. ntawm hydroxypropyl methylcellulose tau txais txiaj ntsig Nws yog qhov tseem ceeb rau kev ua kom zoo tshaj plaws batch, batch thiab cov txheej txheem fermentation tas li, tiv thaiv kev ua haujlwm ntawm cov ntaub so ntswg thiab dilution kab lis kev cai cuam tshuam txog teeb meem;kuj muaj txiaj ntsig zoo rau kev ua haujlwm ntawm cov txheej txheem fermentation.

Hydroxypropyl methylcellulose, raw cellulose, nws tuaj yeem ua cov paj rwb zoo, lossis nws tuaj yeem yog ntoo pulp.Nws yuav tsum tau pulverized ua ntej los yog thaum lub sij hawm alkalization.Nws yog ib qho tsim nyog los pulverize cov cellulose raw khoom los ntawm lub zog txhua yam txhawm rau txo cov crystallinity thiab polymerization degree, nce nws qhov chaw saum npoo, thiab tom qab ntawd txhim kho trihydroxyl degree thiab tshuaj lom neeg muaj peev xwm ntawm cov reactant ntawm lub nplhaib qabzib ntawm cellulose polymer.

Txawm hais tias cov synthesis ntawm hydroxypropyl methylcellulose tsis nyuaj, cov alkali, raw cov ntaub ntawv yog pulverized thiab alkalized.Etherification, hnyav rov qab, kev sib cais ntawm centrifugal, ntxuav thiab ziab hauv ntau qhov chaw, tab sis muaj ntau yam thev naus laus zis tseem ceeb thiab cov ntsiab lus nplua nuj.Rau ntau yam ntawm cov khoom, txhua qhov chaw muaj kev tswj xyuas qhov tseeb, xws li qhov kub thiab txias, lub sij hawm, siab thiab ntws tswj cov chaw pabcuam thiab cov cuab yeej tswj xyuas yog qhov lav ntawm cov khoom ruaj khov, txhim khu kev qha ntau lawm, thiab cov khoom zoo.

Txij li qhov kev ua tau zoo ntawm hydroxypropyl methylcellulose zoo ib yam li lwm cov dej-soluble ethers, nws tuaj yeem siv los ua tus neeg ua yeeb yaj kiab, thickener, emulsifier thiab stabilizer hauv cov xim latex thiab cov dej-soluble resin coatings, abrasion resistance, Uniform txheej thiab adhesion, thiab txhim kho nto nro, stability rau acids thiab bases, thiab compatibility nrog metallic pigments.Hydroxypropyl methylcellulose muaj cov nyhuv zoo li cov thickener rau cov xim dej dawb-raws li polyvinyl acetate.Cov qib ntawm kev hloov ntawm cellulose ether yog txhim kho, thiab kev tiv thaiv kab mob kuj zoo tuaj.