HPMC yog cov paj rwb ntshiab heev cellulose li raw khoom, nyob rau hauv alkaline tej yam kev mob los ntawm tshwj xeeb etherification thiab kev npaj.Dawb los yog dawb hmoov.HPMC txo nrog rau cov ntsiab lus ntawm methoxide txo, nce gel point, txo cov dej solubility thiab txo cov kev ua ntawm nto.
HPMC muaj peev xwm thickening, ntsev tsis kam, hmoov tshauv tsawg, pH stability, dej tuav, seem stability, zoo heev zaj duab xis tsim, thiab ntau yam enzyme kuj, dispersion thiab adhesion.
HPMC, Hydroxypropyl Methylcellulose hom uas tsis yog-ionic cellulose ether, uas yog cov hmoov dawb los ntawm cov xim dawb, uas ua haujlwm ua cov thickener, binder, zaj duab xis-yav dhau los, surfactant, tiv thaiv colloid, lubricant, emulsifier thiab ncua kev pab cuam thiab dej tuav.Tsis tas li ntawd, muaj ntau hom cellulose ethers pom cov khoom ntawm thermal gelation, metabolic inertness, enzyme tsis kam, tsis hnov tsw thiab saj, thiab PH stability.
Vim muaj ntau yam khoom, HPMC feem ntau yog siv los hloov ntau lwm yam additives nrog qis concentration, ua HPMC ib tug incredibly npaum thiab zoo additive nyob rau hauv cheeb tsam ntawm cov nplaum, kev tsim kho, khoom noj khoom haus, khoom siv hauv tsev, tshuaj thiab lwm yam.
| Cov khoom npe | HPMC | ||
| cov ntsiab lus ntawm methoxy | 28.0-30.0 27.0-30.0 19.0-24.0 Nws | ||
| cov ntsiab lus ntawm hydroxypropyl | 7.0-12.0 4.0-7.5 4.0-12.0 | ||
| kub ntawm gelation | 58-64 62-68 70-90 ib | ||
| ya raws | ≤ 5% | ||
| Tshauv | ≤ 1% | ||
| Tus nqi PH | 4-8 | ||
| Kev tshwm sim | Whie hmoov | ||
| Fitness | 80-100 lis | ||
| viscosity | 300-200,000 Nws tuaj yeem raug txiav txim siab | ||
| Re HPMC nce nrog methoxy cov ntsiab lus txo, gel taw tes dej solubility thiab deg kev ua si kuj tsis kam.Nyob ntawm cov neeg siv khoom qhov xwm txheej | |||
Post lub sij hawm: Mar-15-2021