Hais txog qhov teeb meem ntawm gel kub ntawm hydroxypropyl methylcellulose HPMC, ntau cov neeg siv tsis tshua tau them sai sai rau qhov teeb meem ntawm gel kub ntawm hydroxypropyl methylcellulose. Niaj hnub no, hydroxypropyl methylcellulose feem ntau txawv raws li viscosity, tab sis rau qee qhov tshwj xeeb ib puag ncig thiab kev lag luam tshwj xeeb, nws tsis txaus los cuam tshuam cov viscosity ntawm cov khoom. Cov nram qab no luv luv qhia cov gel kub ntawm hydroxypropyl methylcellulose.
Tus nqi ntawm methoxyl pawg yog ncaj qha ntsig txog qib ntawm cellulose sourization, thiab cov ntsiab lus ntawm methoxyl pawg tuaj yeem hloov kho los ntawm kev tswj cov mis, qhov kub thiab txias thiab lub sijhawm tshuaj tiv thaiv. Nyob rau tib lub sijhawm, qhov degree ntawm inactivation cuam tshuam rau qib ntawm kev hloov ntawm hydroxyethyl lossis hydroxypropyl. Yog li ntawd, cov dej tuav ntawm cellulose ether nrog kub gel yuav tsis zoo. Cov txheej txheem tsim khoom no yuav tsum tau tshawb xyuas, yog li nws tsis yog tias tus nqi tsim khoom ntawm cellulose ether yog tsawg yog tias cov ntsiab lus methoxy tsawg, ntawm qhov tsis sib xws, tus nqi yuav siab dua.
Qhov ntsuas kub ntawm gel yog txiav txim los ntawm pawg methoxyl, thiab cov dej tuav tau txiav txim los ntawm pawg hydroxypropoxyl. Tsuas muaj peb pawg uas hloov tau ntawm cellulose. Nrhiav koj qhov kev siv qhov kub thiab txias, tsim dej tuav, thiab tom qab ntawd txiav txim siab tus qauv ntawm cov cellulose no.
Qhov kub ntawm gel yog qhov tseem ceeb rau kev siv cellulose ether. Thaum lub ambient kub tshaj qhov kub ntawm gel, cellulose ether yuav raug cais tawm ntawm dej thiab poob nws cov dej tuav. Lub gel kub ntawm cellulose ether ntawm lub khw tuaj yeem ua tau raws li qhov xav tau ntawm kev siv tshuaj khib nyiab (tshwj tsis yog qhov chaw tshwj xeeb). Thaum thov mortar, tsis tas yuav tsum tau them nyiaj tshwj xeeb rau kev ua haujlwm Performance index ntawm gel kub.
Post lub sij hawm: Apr-04-2023