Dab tsi yog cov ntau yam ntawm cellulose ether?

Cov kws qhia txog cellulose yog muaj ntau pab pawg polymers tau muab los ntawm cellulose, lub ntuj polysaccharide pom hauv cov nroj tsuag. Lawv siv dav hauv ntau yam kev lag luam, suav nrog kev tsim kho, tshuaj, khoom noj, tshuaj pleev ib ce, thiab kev saib xyuas tus kheej thiab versatility. Nov yog qee cov ntau yam ntawm cov cellulose ether:

1. Methyl Cellulose (MC):
   • Methyl cellulose tau tsim los ntawm kev kho cellulose nrog methyl chloride mus qhia methyl pawg mus rau lub cellulose caj qaum.
   • Nws yog soluble nyob rau hauv dej txias thiab cov ntaub ntawv ntshiab, viscous daws teeb meem.
   • MC siv los ua cov tuab, tuav, thiab cov khoom siv tsis sib xws, suav nrog cov khoom siv tsim kho, xws li cov khoom siv tsim kho), cov khoom lag luam gypsum, cov khoom noj, thiab cov khoom tu tus kheej.
2. Hydroxyethyl cellulose (HEC):
   • Hydroxyethyl cellulose yog synthesized los ntawm reacting cellulose nrog ethylene oxide los qhia hydroxyethyl pawg mus rau lub cellulose cellebone.
   • Nws yog soluble nyob rau hauv dej txias thiab cov ntaub ntawv ntshiab, viscous kev daws teeb meem nrog cov khoom siv dej zoo.
   • HEC muaj feem ntau siv los ua cov tuab dua, rheology kho tshuab, thiab cov yeeb yaj kiab ua yeeb yaj kiab rau cov xim, cov khoom lag luam, thiab cov khoom siv saib xyuas tus kheej.
3. HydroxyPropyyl methyl cellulose (HPMC):
   • HydroxyPropy cellulose yog tsim los ntawm kev qhia hydroxypropyl thiab methyl pawg mus rau lub cellulose cellebone.
   • Nws ua rau cov khoom ua kom zoo ib yam li ob lub methyl cellulose thiab hydrothethyl cellulose, suav nrog cov dej solubility, ua yeeb yaj kiab ua yeeb yam, thiab dej tuav.
   • HPMC tau siv dav hauv cov ntaub ntawv tsim kho (piv txwv li, cov khoom sib xyaw ua ke, cov khoom siv rau tus kheej), nrog rau cov khoom lag luam, khoom noj, thiab cov khoom tu tus kheej.
4. Carboxymethyl cellulose (CMC):
   • Carboxymethyl cellulose yog muab los ntawm cellulose los ntawm kho nws nrog sodium hydroxide thiab monochloroacetic acid los qhia cov pawg carboxymethyl.
   • Nws yog soluble hauv dej thiab cov ntaub ntawv ntshiab, viscous cov kev daws teeb meem uas muaj cov khoom siv ua kom zoo, ruaj khov thiab dej khaws cia.
   • CMC yog ib txwm siv los ua cov tuab, phau ntawv, thiab rheology kho hauv cov khoom noj, cov ntaub ntawv, cov ntawv nyeem, thiab qee cov ntaub ntawv tsim kho.
5. Ethyl Cellulose (EC):
   • Cov cellulose Ethlose yog tsim los ntawm kev rov ua cellulose cellulose nrog ethyl chloride los ua cov pab pawg ethyl mus rau lub cellulose cellebone.
   • Nws yog insoluble nyob rau hauv dej tab sis soluble hauv cov kuab tshuaj ethanol thiab chloroform.
   • EC feem ntau siv los ua zaj duab xis-ua tus neeg sawv cev, nrog cov khoom siv, thiab cov khoom noj, cov tshuaj pleev ib ce, thiab cov ntawv thov kev lag luam.

Cov no yog qee cov feem ntau siv ntau yam ntawm cellulose ether, txhua qhov muab cov khoom tshwj xeeb thiab cov txiaj ntsig rau cov ntawv thov sib txawv. Lwm cov kws tshaj lij cellulose muaj nyob, ua kom haum rau cov kev cai hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam nyob rau hauv ntau yam kev lag luam hauv ntau yam kev lag luam.