Hais txog qhov teeb meem ntawm cov gel kub ntawm hydroxypropyl cellulose hpmc, ntau cov neeg siv tsis tshua muaj kev mloog HPMC, ntau cov neeg siv khoom kub ntawm hydroxyprropy cellulose. Tam sim no, HydroxyPropyf methyl cellulose feem ntau yog qhov txawv thiab rau qee qhov chaw tshwj xeeb, nws tsis txaus kom tsuas yog muaj kev cuam tshuam ntawm cov khoom lag luam. Cov lus qhia hauv qab no qhia txog qhov kub thiab txiasHydroxyPropyyl Methyl cellulose.
Tus nqi ntawm mexoxyl pab pawg yog ncaj qha rau kev ntsuas me me, thiab cov ntsiab lus ntawm methoxyl pab pawg tuaj yeem hloov kho los ntawm cov mis, cov tshuaj tiv thaiv kub thiab cov neeg siv khoom siv. Nyob rau tib lub sijhawm, cov degree ntawm inactivation cuam tshuam rau cov degree ntawm hydroxyethyl lossis hydroxypropyl. Yog li ntawd, cov dej khaws cia ntawm cellulose ether nrog cov dej kub siab yuav ua tsis tau zoo. Cov txheej txheem ntau lawm yuav tsum tau tshawb nrhiav, yog li nws tsis yog tias kev tsim khoom siv methoxy yog tsawg yog tias methoxy cov ntsiab lus yog tsawg, ntawm qhov tsis tooj, tus nqi yuav siab dua.
Lub qhov kub thiab txias yog txiav txim siab los ntawm cov pab pawg methoxyl, thiab cov dej tuav tseg yog txiav txim siab los ntawm hydroxypropoxy pawg. Tsuas muaj peb pab pawg hloov chaw ntawm cellulose. Pom koj qhov kev siv ntsuas kub, kev txuag dej haum, thiab tom qab ntawd txiav txim siab tus qauv ntawm cov cellulose no.
Lub gel kub yog qhov tseem ceeb tshaj plaws rau kev thov ntawm cellulose ether. Thaum lub teb kub siab tshaj qhov kub thiab txias tshaj, lub cellulose ether yuav raug cais tawm ntawm cov dej thiab poob nws cov dej khaws cia. Lub qhov kub ntawm cellulose ether rau ntawm kev ua lag luam tuaj yeem ua tau raws li qhov xav tau ntawm cug kev siv tshuaj (tshwj tsis yog rau cov chaw tshwj xeeb). Kuv tus kheej xav tias nws tsis tas yuav tau them nyiaj tshwj xeeb rau qhov ntsuas kub ua kom ntsuas kub ntawm kev siv cug. Ntawm chav kawm, kev tsim covCellulose ether Cov Chaw Tsim Tshuajyuav tsum xav txog nws.
Lub Sijhawm Post: Jan-06-2023