Dab tsi yog Hydroxypropyl Methyl Cellulose
Hydroxypropyl Methylcellulose (HPMC) yog ib qho polymer uas muaj ntau yam los ntawm cellulose, ib qho polymer ntuj pom muaj nyob rau hauv cov phab ntsa ntawm cov nroj tsuag. Nws yog synthesized los ntawm kev hloov kho tshuaj ntawm cellulose los ntawm kev qhia hydroxypropyl thiab methyl pawg rau ntawm cellulose backbone. Qhov kev hloov kho no txhim kho cov dej solubility thiab lwm yam khoom siv ntawm cellulose, ua rau HPMC siv dav hauv ntau yam lag luam.
HPMC muaj nyob rau hauv daim ntawv ntawm cov hmoov dawb zoo uas yaj tau hauv dej thiab qee cov organic solvents. Nws muaj cov yam ntxwv xws li thickening, water retention, film-forming, thiab surface modification. Cov yam ntxwv no ua rau HPMC yog ib qho khoom siv ntxiv rau ntau yam kev siv, suav nrog cov ntaub ntawv siv hauv kev tsim kho, tshuaj, khoom noj, tshuaj pleev ib ce, thiab cov khoom siv tu tus kheej.
Hauv cov ntaub ntawv siv hauv kev tsim kho, HPMC ua haujlwm ua cov khoom tseem ceeb hauv cov khoom siv cementitious xws li mortars, renders, vuas nplaum, thiab grouts. Nws ua haujlwm ua tus neeg sawv cev thickener thiab khaws dej, txhim kho kev ua haujlwm, kev nplaum, thiab kev ruaj khov ntawm cov ntaub ntawv no. Tsis tas li ntawd, HPMC txhim kho qhov sib xws thiab kev ruaj khov ntawm cov qauv, ua rau muaj kev siv zoo dua thiab kev ua tau zoo ntawm ntau yam substrates.
Hauv cov tshuaj, HPMC siv ua tus binder, zaj duab xis-former, thiab tus neeg sawv cev tso tawm ntev hauv cov ntsiav tshuaj, tshuaj ntsiav, tshuaj pleev, thiab cov khoom siv. Nws cov biocompatibility, tsis muaj tshuaj lom, thiab cov khoom tswj kev tso tawm ua rau nws tsim nyog rau cov kab ke xa tshuaj.
Hauv kev lag luam khoom noj, HPMC ua haujlwm ua cov khoom ua kom tuab, ruaj khov, thiab emulsifier hauv cov khoom xws li cov kua ntses, cov khoom qab zib, cov khoom qab zib, thiab cov khoom ci. Nws pab txhim kho cov qauv, qhov ncauj, thiab kev ruaj khov ntawm cov qauv khoom noj.
Hauv cov tshuaj pleev ib ce thiab cov khoom siv tu tus kheej, HPMC siv rau hauv cov tshuaj pleev, tshuaj pleev, tshuaj zawv plaub hau, thiab cov tshuaj gel ua tus neeg sawv cev ua kom tuab, emulsifier, thiab zaj duab xis-former. Nws txhim kho cov khoom sib xws, nthuav dav, thiab cov khoom noo noo.
Zuag qhia tag nrho, Hydroxypropyl Methylcellulose (HPMC) yog ib qho polymer uas siv tau ntau yam vim nws cov yam ntxwv thiab kev ua haujlwm tshwj xeeb. Nws siv tseem niaj hnub loj hlob thoob plaws ntau yam lag luam, pab txhawb rau kev tsim cov khoom tshiab thiab kev ua tau zoo dua hauv cov qauv.
