Dab tsi yog cov cellulose muaj cai

Cov neeg ua haujlwm pab neeg cellulose yog tsev neeg muaj tshuaj sib xyaw ua ke los ntawm cellulose, lub ntuj polymer pom nyob hauv cov phab ntsa ntawm tes ntawm cov nroj tsuag. Cov derivatives tau tsim los ntawm kev hloov kho tshuaj ntawm cov molecules los qhia ntau pawg ua haujlwm, ua rau muaj ntau cov khoom siv thiab cov ntawv thov. Cov neeg hais txog cellulose feem ntau siv hauv kev lag luam xws li kev tsim kho, chaw muag tshuaj, khoom noj, tshuaj pleev ib ce vim lawv cov yam ntxwv zoo thiab muaj txiaj ntsig. Nov yog qee hom ntawm cov kev hais ua ke ntawm cellulose thiab lawv siv:

1. Methyl Cellulose (MC):
   • Methyl cellulose tau tsim los ntawm kev kho cellulose nrog methyl chloride.
   • Nws yog soluble hauv dej thiab cov ntaub ntawv ntshiab, viscous daws.
   • MC yog siv los ua cov tuab dua, nrog cov ntaub ntawv tsim kho, piv txwv li, cov khoom lag luam ua kom zoo nkauj), cov khoom noj, 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.
   • Nws yog soluble nyob rau hauv dej thiab cov ntaub ntawv ntshiab, viscous cov 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.

Cov no yog qee cov neeg siv cellulose feem ntau, txhua tus nrog cov khoom tshwj xeeb thiab cov ntawv thov hla rau ntau yam lag luam. Lwm cov kws tshaj lij ntawm cellulose muaj nyob, txiav rau cov kev cai tshwj xeeb hauv cov ntawv thov sib txawv.