1. Gel kub (0.2% tov) 50-90 ° C.
2. Soluble nyob rau hauv dej thiab feem ntau polar c thiab tsim nyog feem ntawm ethanol / dej, propanol / dej, dichloroethane, thiab lwm yam., insoluble nyob rau hauv ether, acetone, kiag li ethanol, thiab o mus rau hauv ntshiab los yog me ntsis turbid nyob rau hauv dej txias colloidal tov. Cov tshuaj aqueous muaj cov dej num saum npoo av, siab pob tshab thiab kev ua haujlwm ruaj khov.
3. HPMC muaj cov khoom siv thermal gelation. Cov khoom aqueous tov yog rhuab los ua ib tug gel thiab precipitates, thiab ces dissolves tom qab txias. Lub gelation kub ntawm txawv specifications txawv. Solubility sib txawv nrog viscosity. Qhov qis dua qhov viscosity, qhov ntau dua qhov solubility. Kev sib txawv ntawm HPMC muaj qee qhov sib txawv hauv lawv cov khoom, thiab kev sib cais ntawm HPMC hauv dej tsis cuam tshuam los ntawm tus nqi pH.
4. Particle loj: qhov dhau ntawm 100 mesh yog ntau dua 98.5%. Qhov ceev: 0.25-0.70g / (feem ntau nyob ib ncig ntawm 0.4g /), tshwj xeeb gravity 1.26-1.31. Discoloration kub: 180-200 ° C, carbonization kub: 280-300 ° C. Tus nqi methoxyl yog li ntawm 19.0% mus rau 30.0%, thiab tus nqi hydroxypropyl yog li ntawm 4% mus rau 12%. Viscosity (22 ° C, 2%) 5 ~ 200000mPa .s. gel kub (0.2%) yog 50-90 ° C.
5. HPMC muaj cov yam ntxwv ntawm thickening peev xwm, ntsev paug, PH stability, dej tuav, seem stability, zoo heev film-forming cuab yeej thiab ntau yam enzyme kuj, dispersibility thiab cohesiveness.
Post lub sij hawm: Mar-22-2023