Hydroxypropyl methylcellulose tuaj qhov twg?

Hydroxypropyl methylcellulose (HPMC) yog ib tug hluavtaws polymer uas yog muab los ntawm cellulose, uas yog ib txwm tshwm sim organic polymer uas tsim lub cell phab ntsa ntawm cov nroj tsuag. HPMC yog tsim los ntawm kev hloov kho cellulose los ntawm cov txheej txheem hu ua etherification.

Nyob rau hauv etherification, cellulose yog kho nrog ib tug sib tov ntawm propylene oxide thiab methyl chloride nyob rau hauv kev tswj tej yam kev mob los tsim hydroxypropyl cellulose (HPC). HPC tau hloov kho ntxiv los ntawm kev kho nws nrog methanol thiab hydrochloric acid los tsim HPMC.

HPMC cov khoom ua tau yog cov dej-soluble, non-ionic polymer uas muaj ntau yam khoom siv tau zoo, xws li kev tuav dej siab, muaj peev xwm ua tau zoo, thiab zoo heev thickening thiab stabilizing zog. Cov khoom no ua rau HPMC muaj txiaj ntsig zoo nyob rau hauv ntau yam kev siv, xws li cov khoom siv, tshuaj, thiab khoom noj khoom haus.

Thaum HPMC yog muab los ntawm cellulose, nws yog ib tug hluavtaws polymer uas yog tsim los ntawm ib tug complex txheej txheem tshuaj.