Koj paub ntau npaum li cas txog Hydroxypropyl methyl cellulose?

Hydroxypropyl methylcellulose (HPMC) yog cellulose ether uas yog muab los ntawm ntuj cellulose. Nws yog ib qho hluavtaws, dej-soluble, non-ionic polymer uas feem ntau siv hauv ntau yam lag luam xws li kev tsim kho, tshuaj, khoom noj, tshuaj pleev ib ce, thiab textiles.

HPMC yog tsim los ntawm kev hloov kho cellulose nrog propylene oxide thiab methyl chloride los qhia hydroxypropyl thiab methyl pawg rau hauv cellulose molecule. Qib ntawm kev hloov pauv (DS) ntawm HPMC yog hais txog tus naj npawb ntawm hydroxypropyl thiab methyl pawg ib chav tsev anhydroglucose (AGU) ntawm cellulose.

HPMC muaj ntau yam khoom uas ua rau nws muaj txiaj ntsig hauv ntau daim ntawv thov. Nws yog soluble hauv dej, tsim cov tshuaj ntshiab, thiab muaj thermal stability zoo. Nws kuj tseem ruaj khov nyob rau hauv ib txwm kub thiab pH thiab tsis decompose yooj yim. HPMC yog hygroscopic, uas txhais tau hais tias nws tuaj yeem nqus tau thiab khaws cov dej noo. Nws yog non-toxic, non-irritating, thiab non-allergenic, uas ua rau nws muaj kev nyab xeeb rau siv nyob rau hauv ntau daim ntawv thov.

Hauv kev tsim kho kev lag luam, HPMC yog siv los ua cov thickener, binder, thiab dej-retaining tus neeg sawv cev hauv cov khoom siv cement, pobzeb adhesives, plasters, thiab lwm yam khoom siv hauv tsev. Hauv kev lag luam kws tshuaj, HPMC yog siv los ua ib qho kev sib khi, disintegrant, thiab zaj duab xis-yav dhau los hauv cov ntsiav tshuaj thiab tshuaj ntsiav formulations. Hauv kev lag luam khoom noj khoom haus, HPMC yog siv los ua cov thickener, emulsifier, thiab stabilizer hauv ntau yam khoom. Hauv cov tshuaj pleev ib ce, HPMC yog siv los ua cov thickener, zaj duab xis-yav dhau los, thiab emulsifier hauv cov tshuaj pleev, tshuaj pleev, thiab lwm yam tshuaj.

Zuag qhia tag nrho, HPMC yog ntau yam thiab muaj txiaj ntsig polymer uas muaj ntau yam kev siv hauv ntau qhov kev lag luam vim nws cov khoom tshwj xeeb.