Hydroxypropyl methylcellulose (Hypromellose)

Hydroxypropyl Methylcellulose (HPMC) kuj yog feem ntau paub los ntawm lub npe Hypromellose. Hypromellose yog lub npe uas tsis yog tus tswv siv los qhia txog tib lub polymer hauv cov tshuaj thiab kev kho mob. Kev siv lub sij hawm "Hypromellose" muaj ntau nyob rau hauv kev lag luam kws tshuaj thiab yog qhov tseem ceeb ntawm HPMC.

Nov yog qee cov ntsiab lus tseem ceeb hais txog Hydroxypropyl Methylcellulose (Hypromellose):

1. Chemical Structure:
   • HPMC yog ib tug semi-synthetic polymer muab los ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa.
   • Nws yog tsim los ntawm kev hloov kho cellulose los ntawm kev sib ntxiv ntawm hydroxypropyl thiab methyl pawg.
2. Daim ntawv thov:
   • Pharmaceuticals: Hypromellose yog dav siv nyob rau hauv kev lag luam kws tshuaj raws li ib tug excipient. Nws muaj nyob rau hauv ntau hom tshuaj noj hauv qhov ncauj, nrog rau cov ntsiav tshuaj, tshuaj ntsiav, thiab kev ncua. Hypromellose ua hauj lwm raws li ib tug binder, disintegrant, viscosity modifier, thiab zaj duab xis qub.
   • Kev Tsim Kho Kev Lag Luam: Siv rau hauv cov khoom xws li pobzeb nplaum, mortars, thiab cov ntaub ntawv gypsum. Txhim khu kev ua haujlwm, tuav dej, thiab adhesion.
   • Kev lag luam khoom noj khoom haus: Ua haujlwm ua cov thickener, stabilizer, thiab emulsifier hauv cov khoom noj khoom haus, pab txhawb kev ntxhib los mos thiab ruaj khov.
   • Tshuaj pleev ib ce thiab kho tus kheej cov khoom: Pom nyob rau hauv cov tshuaj pleev ib ce, cream, thiab tshuaj pleev rau nws thickening thiab stabilizing zog.
3. Lub cev muaj zog:
   • Feem ntau yog dawb mus rau me ntsis tawm-dawb hmoov nrog ib tug fibrous los yog granular zoo nkauj.
   • Tsis muaj ntxhiab thiab tsis qab.
   • Soluble nyob rau hauv dej, tsim ib tug ntshiab thiab tsis muaj xim.
4. Degrees ntawm Hloov:
   • Cov qib sib txawv ntawm Hypromellose tuaj yeem muaj qhov sib txawv ntawm kev hloov pauv, cuam tshuam cov khoom xws li solubility thiab tuav dej.
5. Kev nyab xeeb:
   • Feem ntau suav tias muaj kev nyab xeeb rau kev siv tshuaj, khoom noj, thiab cov khoom tu tus kheej thaum siv raws li cov txheej txheem tsim.
   • Kev txiav txim siab txog kev nyab xeeb yuav nyob ntawm seb yam xws li qib kev hloov pauv thiab daim ntawv thov tshwj xeeb.

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias thaum tham txog HPMC hauv cov ntsiab lus ntawm cov tshuaj, feem ntau siv lo lus "Hypromellose". Kev siv ob lub ntsiab lus tau txais, thiab lawv xa mus rau tib lub polymer nrog hydroxypropyl thiab methyl hloov pauv ntawm cov pob txha cellulose.