Qhov sib txawv ntawm hydroxypropyl starch thiab hydroxypropyl methyl cellulose

HydroxyPropyl Starch thiab hydroxypropyl cellulose (HPMC) yog ob qho tib si hloov kho polysaccharides (suav nrog cov khoom noj, cov chaw muag tshuaj, tshuaj pleev ib ce, thiab kev tsim kho. Thaum lawv qhia qee qhov sib xws, lawv muaj qhov sib txawv ntawm cov nqe lus ntawm cov qauv tshuaj, khoom, thiab kev siv. Nov yog qhov sib txawv ntawm hydroxypropyl starch thiab HPMC:

Tus qauv tshuaj:

1. HydroxyPropyl Starch:
   • HydroxyPropyl hmoov yog hloov cov hmoov txhuv nplej siab tau los ntawm kev qhia txog cov pab pawg hydroxypropyl mus rau cov hmoov txhuv nplej siab.
   • Cov hmoov txhuv nplej siab yog polysaccharide muaj cov roj haws txuas nrog ua ke los ntawm Glycosidic Bonds. HydroxyProoSylation koom nrog rau kev hloov chaw ntawm hydroxyl (-H) pawg nyob rau hauv cov hmoov txhuv nplej siab molecule nrog hydroxypropyl (-ch2chohch3) pawg.
2. HydroxyPropyyl methyl cellulose (HPMC):
   • HPMC yog hloov kho cellulose ether tau los ntawm kev qhia txog ob pawg methropropyl thiab methyl pawg mus rau cellulose molecule.
   • Cellulose yog polysaccharide muaj cov khoom muaj txiaj ntsig txuas nrog ua ke los ntawm β (1 → 4) glycosidic bonds. HydroxyProdation qhia txog hydroxypropyl (-ch2chohch3) pawg, thaum methylation qhia methylation methylation me me caj qaum.

Khoom:

1. Solubility:
   • HydroxyPropyl STARCH yog feem ntau soluble hauv dej kub tab sis tuaj yeem ua kom pom muaj tsawg solubility hauv dej txias.
   • HPMC yog soluble nyob rau hauv ob qho tib si txias thiab dej kub, kev ua kom meej, viscous daws teeb meem. Lub solubility ntawm HPMC nyob ntawm seb cov qib hloov pauv (DS) thiab qhov hnyav molecer.
2. Viscosity:
   • HydroxyPropyl Starch yuav nthuav qhia viscosity-txhim kho cov khoom, tab sis nws viscosity feem ntau qis dua piv rau HPMC.
   • HPMC paub txog nws cov tuab heev thickening thiab viscosity-kho cov khoom. Lub viscos ntawm HPMC cov kev daws teeb meem tuaj yeem hloov kho los ntawm sib txawv ntawm cov polymer concentration, DS, thiab hnyav.

Cov Ntawv Thov:

1. Khoom noj khoom haus thiab chaw muag khoom noj:
   • HydroxyPropyl STARCH yog feem ntau siv los ua cov tuab, stabilizer, thiab cov txiv neej cov khoom noj hauv cov zaub mov xws li kua zaub, thiab qab zib. Nws kuj tseem siv tau hauv cov tshuaj ua haujlwm.
   • HPMC tau siv dav hauv cov zaub mov, cov tshuaj, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, emulsifier, stabilizer, zaj duab xis yav tas los, thiab tswj-tso tawm tus neeg sawv cev. Nws yog feem ntau pom nyob rau hauv cov khoom xws li ntsiav tshuaj, tshuaj pleev xim, cream, thiab cov khoom saib xyuas tus kheej.
2. Kev tsim kho thiab tsev ua haujlwm:
   • HPMC yog qhov dav dav nyob rau hauv kev tsim kho kev tsim kho ua ib qho kev sib ntxiv hauv cov khoom xyaw ua ke xws li cov nplaum nplaum, cov khoom lag luam mortar, thiab plasters. Nws muab cov dej ua haujlwm ruaj, ua haujlwm, cov nplaum, thiab txhim kho kev ua tau zoo hauv cov ntawv thov no.

Xaus:

Thaum ob qho tib si hydroxypropyl cov hmoov txhuv nplej siab thiab HPMC tau hloov polysaccharides nrog kev ua haujlwm zoo sib xws, lawv muaj cov qauv siv tshuaj sib txawv, cov khoom, thiab cov ntawv thov. HydroxyPropyl STARCH yog feem ntau siv nyob rau hauv cov zaub mov thiab ntaub ntawv thov tshuaj, thaum HPMC pom ntau yam nyob rau hauv cov zaub mov, cov tshuaj, tshuaj pleev ib ce, thiab cov ntaub ntawv kho kom zoo nkauj, thiab cov ntaub ntawv tshuaj pleev ib ce, thiab cov khoom siv tshuaj pleev. Qhov kev xaiv ntawm HydroxyPropyl Starch thiab HPMC nyob ntawm qhov kev xav tau ntawm cov ntawv thov npaj.