Kev txiav txim siab yooj yim ntawm qhov zoo ntawm Hydroxypropyl MethylCellulose

Hydroxypropyl Methylcellulose (HPMC) yog ib qho khoom siv polymer feem ntau hauv kev lag luam kws tshuaj ua tus neeg siv khoom lossis ua cov txheej txheem rau cov ntsiav tshuaj thiab tshuaj ntsiav. Qhov zoo ntawm HPMC tuaj yeem txiav txim siab los ntawm ntau yam tsis sib xws, xws li viscosity, noo noo cov ntsiab lus, particle loj faib, thiab purity.

Ib txoj hauv kev yooj yim los txiav txim siab qhov zoo ntawm HPMC yog los ntawm kev ntsuas nws cov viscosity. Viscosity yog ib qho kev ntsuas ntawm cov kua dej tsis kam ntws, thiab nws ncaj qha ntsig txog qhov hnyav molecular ntawm HPMC. Qhov hnyav dua molecular HPMC yuav muaj viscosity ntau dua li qhov hnyav molecular HPMC. Yog li, qhov siab dua qhov viscosity ntawm HPMC, nws qhov zoo dua.

Lwm qhov tseem ceeb uas yuav tsum tau xav txog yog cov dej noo ntawm HPMC. Cov dej noo ntau dhau tuaj yeem ua rau HPMC degradation, uas tuaj yeem txo nws cov txiaj ntsig. Qhov kev pom zoo ntawm cov ntsiab lus noo noo rau HPMC nws txawv nyob ntawm qhov kev siv, tab sis feem ntau nws yuav tsum qis dua 7%.

Lub particle loj faib ntawm HPMC kuj yog ib qho tseem ceeb hauv kev txiav txim siab nws qhov zoo. HPMC nrog qhov nqaim particle loj faib yog qhov nyiam vim nws tso cai rau cov khoom lag luam zoo sib xws thiab sib xws. Qhov loj me me tuaj yeem txiav txim siab siv ntau yam txuj ci xws li laser diffraction lossis microscopy.

Thaum kawg, qhov purity ntawm HPMC kuj yuav tsum tau soj ntsuam. Lub purity ntawm HPMC tuaj yeem txiav txim siab los ntawm kev tshuaj xyuas nws cov tshuaj muaj pes tsawg leeg siv cov tswv yim xws li kev ua haujlwm siab ua kua chromatography (HPLC) lossis Fourier-transform infrared spectroscopy (FTIR). Cov impurities hauv HPMC tuaj yeem cuam tshuam rau nws txoj kev nyab xeeb thiab kev ua tau zoo.

Hauv kev xaus, qhov zoo ntawm HPMC tuaj yeem txiav txim siab los ntawm kev ntsuas nws cov viscosity, noo noo cov ntsiab lus, particle loj faib, thiab purity. Cov kev ntsuas no tuaj yeem soj ntsuam tau yooj yim siv ntau yam txuj ci, thiab HPMC zoo yuav tsum muaj viscosity siab, tsis muaj dej noo, nqaim particle loj, thiab siab purity.