Kev cuam tshuam ntawm qib kev hloov pauv (DS) ntawm HEC Zoo

HEC (hydroxyethyl cellulose) yog ib qho tsis-ionic, dej-soluble polymer uas tau siv dav hauv ntau yam lag luam xws li kev saib xyuas tus kheej, tshuaj, thiab zaub mov ua cov thickening, khi, thiab stabilizing tus neeg sawv cev. Qhov degree ntawm kev hloov pauv (DS) yog qhov tseem ceeb tsis zoo uas tuaj yeem cuam tshuam rau cov khoom thiab kev ua haujlwm ntawm HEC.

Qib ntawm kev hloov pauv yog hais txog qhov nruab nrab ntawm cov pab pawg hydroxyethyl uas txuas rau txhua chav anhydroglucose ntawm cellulose qaum. Hauv lwm lo lus, nws ntsuas qhov twg ntawm cov cellulose molecule tau hloov kho nrog hydroxyethyl pawg.

Kev cuam tshuam ntawm qib kev hloov pauv ntawm HEC zoo yog qhov tseem ceeb. Feem ntau, raws li qib kev hloov pauv nce, qhov solubility ntawm HEC hauv dej nce, thiab nws cov viscosity txo. HEC nrog rau qib siab dua ntawm kev hloov pauv muaj qis dua viscosity, thiab nws muaj ntau dua soluble hauv dej. Qhov no yog vim hais tias cov pab pawg hydroxyethyl cuam tshuam cov hydrogen bonding ntawm cov cellulose chains, ua rau ib tug ntau qhib thiab saj zawg zog qauv.

Tsis tas li ntawd, kev hloov pauv ntau dua tuaj yeem txhim kho thermal stability ntawm HEC thiab ua rau nws tsis kam mus rau enzymatic degradation. Txawm li cas los xij, kev hloov pauv ntau dhau tuaj yeem ua rau txo qis ntawm qhov hnyav ntawm molecular thiab poob ntawm cov khoom qub ntawm cov pob txha cellulose, uas tuaj yeem cuam tshuam tag nrho kev ua haujlwm ntawm HEC.

Hauv cov ntsiab lus, qhov kev hloov pauv yog qhov tseem ceeb uas tuaj yeem cuam tshuam rau cov khoom thiab kev ua haujlwm ntawm HEC. Kev hloov pauv ntau dua tuaj yeem txhim kho cov solubility thiab thermal stability ntawm HEC, tab sis kev hloov pauv ntau dhau tuaj yeem ua rau poob ntawm cov khoom qub ntawm cov pob txha cellulose, uas tuaj yeem cuam tshuam tag nrho kev ua haujlwm ntawm HEC.