Ntau tus 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 chaw tshwj xeeb thiab kev lag luam tshwj xeeb, tsuas yog cov viscosity ntawm cov khoom tau cuam tshuam. Tsis txaus, cov hauv qab no luv luv qhia cov gel kub ntawm hydroxypropyl methylcellulose.
Cov ntsiab lus ntawm methyl acid yog ncaj qha ntsig txog ester-forming degree ntawm cellulose ester, thiab cov ntsiab lus ntawm methyl acid yog hloov kho los tswj cov formulation, tshuaj tiv thaiv kub thiab tshuaj tiv thaiv lub sij hawm. Nyob rau tib lub sijhawm, qib ntawm ether tov cuam tshuam cov ntsiab lus ntawm hydroxyethyl lossis hydroxyapatite. Yog li ntawd, cellulose ethers ntawm qhov kub siab tshaj plaws ntawm cov gel yuav tsis ntub. Cov txheej txheem tsim khoom no yuav tsum tau pom tseeb, yog li tsis txhob muaj cov methoxides qis, cellulose ethers yuav yog tus nqi siab dua me ntsis.
Gel kub tau txiav txim siab nrog methoxide thiab hydroxyproazepam nrog hydroxyproxin. Tsuas yog peb pawg tuaj yeem hloov pauv ntawm cellulose. Nrhiav qhov kub thiab txias, txuag cov av noo, thiab txiav txim siab lub pulp qauv. Qhov kub ntawm cov gel yog qhov tseem ceeb rau kev siv cellulose ether. Thaum lub ambient kub tshaj qhov kub ntawm gel, cellulose ether yuav raug tso tawm ntawm dej. Qhov kub ntawm lub pulp ntawm kev ua lag luam feem ntau yog ua kom tau raws li qhov xav tau ntawm kev daws teeb meem hauv ib puag ncig (tshwj tsis yog rau cov xwm txheej tshwj xeeb). Nws ntseeg tau tias thaum siv cov tshuaj, nws tsis tas yuav tsum tau them nyiaj tshwj xeeb rau cov ntsuas kev ua tau zoo thaum siv cov gel. Tau kawg, cov chaw tsim khoom ntawm cellulose ether yuav tsum coj mus rau hauv tus account qhov ntsuas no.
Post lub sij hawm: Apr-21-2023