1. Gel kub (0.2% kua) 50-90 ° C.
2. Yaj hauv dej thiab feem ntau polar c thiab qhov sib piv ntawm ethanol/dej, propanol/dej, dichloroethane, thiab lwm yam kom haum, tsis yaj hauv ether, acetone, ethanol kiag li, thiab o mus ua pob tshab lossis me ntsis turbid hauv dej txias colloidal kua. Cov kua aqueous muaj kev ua haujlwm ntawm qhov chaw, pob tshab siab thiab kev ua haujlwm ruaj khov.
3. HPMC muaj cov khoom ntawm thermal gelation. Cov khoom aqueous kua yog cua sov kom ua gel thiab precipitates, thiab tom qab ntawd yaj tom qab txias. Qhov kub gelation ntawm cov lus qhia sib txawv yog txawv. Solubility sib txawv nrog viscosity. Qhov qis dua viscosity, qhov ntau dua solubility. Cov lus qhia sib txawv ntawm HPMC muaj qee qhov sib txawv hauv lawv cov khoom, thiab qhov yaj ntawm HPMC hauv dej tsis cuam tshuam los ntawm pH tus nqi.
4. Qhov loj ntawm cov khoom me me: 100 mesh dhau tus nqi ntau dua 98.5%. Qhov ceev ntawm cov khoom loj: 0.25-0.70g / (feem ntau nyob ib puag ncig 0.4g /), qhov hnyav tshwj xeeb 1.26-1.31. Qhov kub ntawm kev hloov xim: 180-200 ° C, qhov kub ntawm carbonization: 280-300 ° C. Tus nqi methoxyl yog txij li 19.0% txog 30.0%, thiab tus nqi hydroxypropyl yog txij li 4% txog 12%. Viscosity (22 ° C, 2%) 5 ~ 200000mPa .s. Qhov kub ntawm Gel (0.2%) 50-90 ° C
5. HPMC muaj cov yam ntxwv ntawm kev ua kom tuab, kev tso ntsev tawm, PH ruaj khov, kev khaws dej, kev ruaj khov ntawm qhov ntev, cov khoom ua yeeb yaj kiab zoo heev, ntau yam kev tiv thaiv enzyme, kev sib kis thiab kev sib koom ua ke.
Lub sijhawm tshaj tawm: Plaub Hlis-17-2023