HydroxyPropyyl methylcellose (HPMC) yog lub cellulose derivative dav siv nyob rau hauv ntau yam kev lag luam xws li cov tshuaj, khoom noj thiab kev tsim kho. Nws cov haujlwm thiab cov khoom ua rau nws yog cov khoom tseem ceeb, tshwj xeeb yog siv ua phau ntawv uas nws tau ncua thiab viscosity-nce tus neeg sawv cev. HPMC tseem dav paub txog nws cov dej khaws cia, uas ua cov haujlwm tseem ceeb ntawm ntau yam khoom thiab cov ntawv thov.
Dej khaws cia yog lub peev xwm ntawm cov khoom siv los tuav lossis khaws dej. Tus HPMC, nws yog lub peev xwm nqus thiab khaws dej, tshwj xeeb tshaj yog nyob rau hauv cov kev daws teeb meem aqueous. Cov dej khaws cia ntawm HPMC cuam tshuam los ntawm ntau yam, suav nrog nws cov kev xav, viscosity, kub thiab pH.
Ib qho ntawm qhov tseem ceeb cuam tshuam rau cov dej tuav tseg ntawm HPMC yog nws cov laj thawj. HPMC muaj cov dej rov qab ua kom muaj peev xwm ua kom muaj peev xwm ua kom muaj peev xwm ntau dua. Raws li cov concmration ntawm HPMC nce, nws viscosity kuj nce, ua rau muaj peev xwm rov ua kom muaj peev xwm ntau dua. Txawm li cas los xij, siab dhau ib qho kev xav tau tej zaum yuav ua rau muaj peev xwm ua kom tsawg hauv kev ua tau dej, yog li cuam tshuam tag nrho cov khoom lag luam.
Lwm qhov cuam tshuam uas cuam tshuam rau cov dej khaws cia ntawm HPMC yog viscosity. Viscosity hais txog kev ntws tsis kam ntawm HPMC. Qhov siab tshaj plaws viscosity, ntau dua cov dej muaj peev xwm ua kom muaj peev xwm. Txawm li cas los xij, siab viscosity tseem tuaj yeem ua rau tsis muaj kev phom sij tsis zoo, uas tuaj yeem cuam tshuam cov khoom lag luam. Yog li, qhov sib npaug zoo ntawm viscosity thiab cov dej-tuav peev yuav tsum tau tswj kom ua tiav kom ua tiav cov txiaj ntsig xav tau.
Qhov kub kuj cuam tshuam rau cov dej tuav tseg ntawm HPMC. Thaum ntau dua qhov kub thiab txias, hpmc muaj qhov muaj peev xwm ua kom muaj zog qis dua. Qhov no yog vim tias qhov kub siab tuaj yeem ua rau HPMC kom poob nws lub peev xwm los khaws dej. Nyob rau hauv kev sib piv, qis dua qhov kub sim txhawb nqa dej ua ke, ua HPMC ib qho khoom xyaw zoo tagnrho uas xav tau cov dej ua ke, xws li cov tshuaj pleev thiab tshuaj pleev.
Tus lej ntawm cov kev daws teeb meem tseem cuam tshuam rau cov dej tuav tseg ntawm HPMC. Ntawm qhov qis rau theem qib, HPMC muaj lub peev xwm rov ua kom dua. Qhov no yog vim hais tias acidic tej yam kev pab txhawb kev nqus dej hauv HPMC. Ntawm qhov tod tes, HPMC muaj qis dua dej lub peev xwm ntawm pH qhov tseem ceeb. Alkaline tej yam kev mob tuaj yeem ua rau HPMC poob dej cov khoom siv tsis tau, ua rau muaj kev ua tau zoo.
Cov dej khaws cia ntawm HPMC yog cov khoom tseem ceeb uas cuam tshuam nws cov kev ua tau zoo thiab kev ua haujlwm nyob rau ntau yam khoom thiab cov ntawv thov. Nws cuam tshuam los ntawm ntau yam, suav nrog kev xav, viscosity, kub thiab pH. Yuav kom ua tiav cov txiaj ntsig xav tau, qhov sib npaug yog yuav tsum tau tswj hwm ntawm cov yam ntxwv. HPMC cov dej ua kom zoo heev ua rau nws muaj cov khoom zoo tshaj plaws hauv ntau cov khoom lag luam, suav nrog cov tshuaj, khoom noj thiab cov khoom siv siv. Thaum peb txuas ntxiv tshawb nws cov yam ntxwv thiab lub peev xwm, HPMC yuav tsum ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev lag luam ntau dua thiab cov khoom lag luam tshiab.
Lub Sijhawm Post: Feb-19-2025