Kev yaj ntawm HPMC

Hydroxypropyl methylcellulose (HPMC) yaj tau hauv dej, uas yog ib qho ntawm nws cov khoom tseem ceeb tshaj plaws thiab pab txhawb rau nws qhov kev siv tau ntau yam. Thaum ntxiv rau hauv dej, HPMC tawg thiab ua kom noo, tsim cov tshuaj ntshiab thiab khov. Qhov solubility ntawm HPMC nyob ntawm ntau yam, suav nrog qib ntawm kev hloov pauv (DS), qhov hnyav molecular ntawm cov polymer, thiab qhov kub ntawm cov tshuaj.

Feem ntau, HPMC nrog cov nqi DS qis dua feem ntau yaj tau zoo dua hauv dej piv rau HPMC nrog cov nqi DS siab dua. Ib yam li ntawd, HPMC nrog cov qib hnyav molecular qis dua yuav muaj cov nqi yaj sai dua piv rau cov qib hnyav molecular siab dua.

Qhov kub ntawm cov tshuaj kuj cuam tshuam rau qhov solubility ntawm HPMC. Qhov kub siab dua feem ntau ua rau kom muaj kev solubility ntawm HPMC, ua rau kom yaj sai dua thiab hydrated. Txawm li cas los xij, HPMC cov tshuaj tuaj yeem dhau los ua gelation lossis sib cais theem ntawm qhov kub siab, tshwj xeeb tshaj yog ntawm cov concentration siab.

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias thaum HPMC yaj tau hauv dej, qhov nrawm thiab qhov dav ntawm kev yaj yuav txawv nyob ntawm qib tshwj xeeb ntawm HPMC, cov xwm txheej ntawm kev tsim cov tshuaj, thiab lwm yam khoom ntxiv uas muaj nyob hauv lub kaw lus. Tsis tas li ntawd, HPMC yuav ua rau pom cov yam ntxwv sib txawv ntawm kev yaj hauv cov kuab tshuaj organic lossis lwm cov kab ke uas tsis yog dej.

Qhov solubility ntawm HPMC hauv dej ua rau nws yog ib qho polymer muaj txiaj ntsig rau ntau yam kev siv uas xav tau kev hloov pauv viscosity, kev tsim zaj duab xis, lossis lwm yam kev ua haujlwm.