Hais txog gel kub ntawm hydroxypropyl methyl celluloseHPMC, ntau tus neeg siv tsis tshua tau them nyiaj rau gel kub ntawm hydroxypropyl methyl cellulose. Tam sim no hydroxypropyl methyl cellulose feem ntau txawv raws li nws cov viscosity, tab sis rau qee qhov chaw tshwj xeeb thiab kev lag luam tshwj xeeb, nws tsis txaus los tsuas yog cuam tshuam cov viscosity ntawm cov khoom. Cov nram qab no luv luv qhia cov gel kub ntawm hydroxypropyl methylcellulose.
Cov ntsiab lus ntawm methoxy pawg muaj feem cuam tshuam ncaj qha rau qib ntawm kev lim ntshav ntawm cellulose, thiab cov ntsiab lus ntawm methoxy 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, qib ntawm carboxylation cuam tshuam rau qib ntawm kev hloov ntawm hydroxyethyl lossis hydroxypropyl. Yog li ntawd, cov dej tuav ntawm cellulose ethers nrog kub gel feem ntau yog me ntsis zuj zus. Cov txheej txheem tsim khoom no yuav tsum tau tshawb xyuas, yog li nws tsis yog tias cov ntsiab lus ntawm methoxy pawg tsawg, cov nqi tsim khoom ntawm cellulose ether yog tsawg, ntawm qhov tsis sib xws, nws tus nqi yuav siab dua.
Lub gel kub yog txiav txim los ntawm pawg methoxy, thiab cov dej tuav tau txiav txim los ntawm pawg hydroxypropoxy. 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 sivcellulose ether. Thaum lub ambient kub tshaj qhov kub ntawm gel, cellulose ether yuav cais los ntawm dej thiab poob dej tuav. Lub gel kub ntawm cellulose ether ntawm lub lag luam tuaj yeem ua tau raws li qhov xav tau ntawm ib puag ncig uas siv cov tshuaj khib (tshwj tsis yog rau ib puag ncig tshwj xeeb). Cov neeg tsim khoom yuav tsum xav txog qhov no.
Post lub sij hawm: Apr-26-2024