Cov khoom ntawm hydroxypropyl methyl cellulose

HydroxyPropyyl methylcellose (HPMC) yog cov polymer ntau yam nrog ntau yam ntawm cov khoom uas ua rau nws haum rau ntau yam kev lag luam thiab kev lag luam. Qee qhov tseem ceeb ntawm HPMC suav nrog:

1. Dej solubility: HPMC yog soluble hauv dej txias, sib sau meej lossis me ntsis opalescent daws. Lub solubility tuaj yeem sib txawv raws li cov degree ntawm kev hloov pauv (DS) ntawm hydroxyproylyl thiab methyl pawg.
2. Thermal Stability: HPMC cov khoom pov thawj zoo thermal stability, tuav nws cov khoom dhau qhov ntau qhov kub ntau. Nws tuaj yeem tiv thaiv kev ua kom kub tau ntsib hauv ntau yam kev lag luam, suav nrog cov tshuaj, khoom noj khoom haus, thiab kev tsim kho.
3. Zaj duab xis-tsim muaj: HPMC muaj peev xwm ua tau los tsim cov yeeb yaj kiab hloov tau thiab sib xyaw ua kom qhuav. Cov cuab yeej no yog siv hauv cov ntawv thov xws li cov yeeb yaj kiab ua yeeb yaj kiab rau cov ntsiav tshuaj thiab cov ntsiav tshuaj, ntxiv rau hauv cov tshuaj pleev ib ce thiab cov khoom siv saib xyuas tus kheej.
4. Viscosity: HPMC muaj nyob rau hauv ntau ntawm viscosity qib, tso cai rau kev tswj kom meej meej dhau ntawm rheological cov khoom ntawm cov qauv. Nws ua raws li cov tuab tuab thiab rheology kho hauv cov kab ke xws li cov xim av, cov nplaum, thiab cov khoom noj.
5. Dej khaws cia: HPMC cov khoom pov thawj zoo ua kom zoo, ua rau cov dej-soluble polymer rau siv hauv cov khoom siv xws li Mortars, thiab renders. Nws pab tiv thaiv kom tsis txhob muaj dej ceev xwm thaum sib xyaw thiab kev thov, txhim kho cov haujlwm ua haujlwm thiab cov nplaum.
6. Adhesion: HPMC txhim kho cov nplaum ntawm txheej, cov nplaum nplaum, thiab cov ntawv foob rau ntau hom substrates. Nws ua cov kev sib raug zoo nrog cov chaw, ua rau muaj kev ua tiav thiab kev ua tau zoo ntawm cov khoom tiav.
7. Qhov nro txo ​​qis: HPMC tuaj yeem txo cov kev nro ntawm cov kua aqueous, txhim kho cov chaw ntub dej thiab kis cov khoom siv. Cov cuab yeej no tau txais txiaj ntsig zoo nyob rau hauv cov ntawv thov xws li tshuaj ntxuav, tshuaj ntxuav, thiab cov qauv ua liaj ua teb.
8. Stabilization: HPMC ua raws li lub stabilizer thiab emulsifier hauv kev ncua, emulsions, pab tiv thaiv theem sib cais thiab txhim kho kev ruaj khov nyob rau lub sijhawm.
9. Biocompatibility: HPMC feem ntau tau pom tias muaj kev nyab xeeb (gras) los ntawm kev tswj hwm thiab tau siv dav hauv cov tshuaj, khoom noj, thiab tshuaj pleev ib ce. Nws yog biocompam thiab tsis muaj tshuaj lom thiab lom, ua rau nws siv rau hauv qhov ncauj, cov ntsiab lus, thiab ophthalmic formulations.
10. Tshuaj sib xyaw: HPMC tau tshaj tawm ntau yam ntawm lwm yam khoom xyaw, suav nrog sals, acids, thiab cov kuab tshuaj organic. Qhov kev sib xyaw no tso cai rau cov qauv tsim ntawm cov tshuab nyuaj nrog cov khoom siv.

Cov yam ntxwv ntawm hydroxypropylulose (HPMC) ua rau nws muaj txiaj ntsig ntxiv hauv ntau yam kev lag luam, qhov twg nws muaj kev ruaj khov, thiab kev ua haujlwm ntawm ntau yam khoom lag luam thiab cov qauv.