Cellulose ether

Cellulose etheryog tsim los ntawm cellulose los ntawm lub etherification cov tshuaj tiv thaiv ntawm ib lossis ob peb lub herherulation tus sawv cev thiab kev sib tsoo qhuav. Raws li cov qauv siv hluav taws xob sib txawv ntawm ERET cov neeg muaj kev pab cuam cellulose tuaj yeem muab faib ua anionic, cationic thiab tsis muaj kev ua neej. Ionic Cellulose muaj neeg muaj cai tsuas yog suav nrogCarboxymethyl cellulose ether (cmc); Cov neeg tsis muaj kev cuam tshuam ntawm cov neeg uas muaj kev cuam tshuam nrogMethyl cellulose ether (mc),HydroxyPropyl methyl cellulose ether (HPMC)Thiab hydroxyethyl cellulose ether.Chlorine Etaws (HC)Thiab yog li ntawd. Cov tsis muaj kev ua haujlwm tsis yog-ionic tau muab faib ua cov dej-soluble cov neeg muaj kev coj zoo thiab cov roj hmab dej-ionic yog siv hauv cov tshuaj cug. Nyob rau hauv muaj cov calcium ions, ionic cellulose ether yog tsis ruaj khov, yog li nws tsis tshua muaj txiv qaub, thiab lwm yam raws li cov ntaub ntawv tsoosting. Nonionic dej-soluble cellulose cov neeg muaj kev hais ua ke tau siv dav hauv cov ntaub ntawv kev lag luam hauv tsev vim tias lawv cov kev kawm ruaj khov thiab dej rov qab.

Tshuaj lom neeg cov khoom ntawm cellulose ether

Txhua lub cellulose ether muaj cov qauv yooj yim ntawm cellulose -anhydrucuce qauv. Nyob rau hauv cov txheej txheem ntawm kev ua cellulose cellulose cellulose, lub cellulose fiber ntau yog thawj zaug ua kom sov hauv ib qho kev daws teeb meem alkaline. Cov tshuaj tiv thaiv fibrous yog huv thiab pulverized los ua ib qho kev hnav khaub ncaws hnav nrog ib qho kev lom zem.

Hauv cov txheej txheem ntau lawm ntawm MC, tsuas yog methyl chloride yog siv los ua tus sawv cev ntawm lub raum; Ntxiv rau methyl chloride, propylene oxide kuj tseem siv tau los nrhiav hydroxypropyl hloov pawg nyob hauv kev tsim HPMC. Ntau yam kev hais ua cellulose muaj cov methylopyl thiab hydroxypropal hloov cov lus qhia, uas cuam tshuam rau cov organic sib piv, qhov hluav taws kub ntawm cellulose ether.