HydroxyPropyyl methylulose (innPromelose), tseem yooj yim li Hypromellose (HydroxyProd Nws yog lub shatthetic semi-intive, pencoelicity polymer feem ntau siv raws li kev zam lossis kev zam hauv ntau yam khoom lag luam.
Raws li cov zaub mov ntxiv, hypromellose tuaj yeem ua cov yeeb yam hauv qab no: emulsifier, thickener, ncua rau tsiaj gelatin. Nws cov cai (e-code) hauv Codex Alabentarius yog E464.
Tshuaj lom neeg cov khoom:
Cov khoom tiav ntawm HydroxyPropyylencellulose yog hmoov dawb lossis dawb xoob xoob heev los ntawm 80-mesh sab cib. Qhov sib piv ntawm cov methoxyl cov ntsiab lus rau cov khoom siv hydroxypropyl ntawm cov khoom tiav yog txawv, thiab nws ua ntau yam nrog ntau yam nrog kev ua yeeb yam sib txawv. Nws muaj cov yam ntxwv ntawm kev ua soluble hauv dej txias thiab insoluble hauv cov dej kub zoo sib xws li methyl cellulose, thiab nws solubility nyob rau hauv cov kuab tshuaj hauv cov dej. Nws tuaj yeem yog yaj nyob rau hauv cov tshuaj methanol thiab ethanol, thiab tuaj yeem ua kom yaj nyob rau hauv chlorined hydrothe, thiab organic kuab tshuaj xws li acetone, isopropanol, thiab diacetone cawv. Thaum yaj hauv dej, nws yuav sib txuas nrog cov lwg dej los ua ib qho colloid. Nws yog ruaj khov rau cov kua qaub thiab alkali, thiab tsis cuam tshuam nyob rau hauv ntau ntau ntawm PH = 2 ~ 12. Hypromellose, txawm hais tias tsis muaj tshuaj lom, yog cov nplaim taws thiab reawcts ua txhaum nrog oxidizing cov neeg sawv cev.
Lub visccosity ntawm HPMC cov khoom nce nrog kev nce siab thiab cov hnyav, thiab thaum lub qhov kub nce, nws cov viscosity pib txo qis. Thaum nws mus txog ib qho kub thiab txias, lub viscosity dheev nce thiab gelation tshwm sim. Qhov siab ntawm. Nws cov kua aqueous yog qhov ruaj khov nyob rau hauv chav tsev kub, tshwj tsis yog tias nws tuaj yeem ua rau muaj kev cuam tshuam los ntawm cov enzyms, thiab nws cov dav dav dav hlau tsis muaj qhov tshwm sim tsis txaus ntseeg. Nws muaj cov cua sov tshwj xeeb thermal gelation cov khoom, zoo zaj duab xis-ua cov khoom thiab cov haujlwm saum npoo av.
Ua:
Tom qab lub cellulose tau kho nrog alkali, Alkoxy Anion tsim los ntawm qhov tsis txaus ntseeg ntawm cov pab pawg hydroxyl tuaj yeem tsim kom muaj hydroxypropyl cellulose ether; Nws kuj tseem tuaj yeem ua tau nrog methyl chloride los tsim cov methyl cellulose ether. HydroxyPropyyl methylulose tsim tawm thaum ob qho kev cuam tshuam yog nqa tawm ib txhij.
Kev Siv:
Kev siv ntawm hydroxypropyl methylcellulose zoo ib yam li ntawd ntawm lwm cov kws kho mob cellulose. Nws yog tsuas yog siv los ua tus neeg sawv cev txawv txawv, txo tus neeg sawv cev, thickener, emulsifier, stabilizer, stabilizer thiab adhesive hauv ntau thaj teb. Nws yog qhov zoo dua rau lwm cov cellulose cov neeg muaj cai hais txog solubility, dispersibility, transparency thiab enzyme tsis kam.
Hauv cov zaub mov thiab kev lag luam kws tshuaj, nws siv los ua kev ntxiv. Nws yog siv los ua cov nplaum, thickener, dispersant, emollient, stabilizer thiab emulsifier. Nws tsis muaj tshuaj lom, tsis muaj txiaj ntsig zoo, thiab tsis muaj kev hloov pauv metabolic.
Tsis tas li ntawd, HPMC muaj cov ntawv thov hauv hluavtaws Resin polymerization, ceramics, tawv, cov ntaub ntawv ua kom zoo, cov ntaub ntawv tsim tsev thiab cov ntaub ntawv luam tawm duab.
Lub sij hawm ncua: Mar-15-2023