Qhov sib txawv hauv lub cev thiab tshuaj kho mob nruab nrab ntawm HPMC thiab Hemc

HydroxyPropyyl methylulose (HPMC) thiab hydroxyethy muaj kev pab hais txog ntau yam uas tau siv ntau yam kev lag luam vim lawv cov khoom siv ntau yam thiab tshuaj lom neeg. Txawm hais tias lawv cov qauv tshuaj zoo sib xws, muaj qhov sib txawv tseem ceeb hauv lawv cov khoom uas ua rau lawv haum rau cov ntawv thov sib txawv.

1. Dememical qauv:

Ob tus HPMC thiab Hemsc yog muab tau los ntawm cellulose, lub ntuj polymer. Lub ntsiab sib txawv nyob hauv cov neeg hloov mus rau lub cellulose caj qaum. Hauv HPMC, cov chaw hloov muaj xws li methyl thiab hydroxypropyl, thaum nyob hauv Hemc, cov chaw tuaj yeem muaj xws li methyl thiab hydroxyethyl. Cov kev hloov no tuaj yeem cuam tshuam rau cov khoom tag nrho ntawm cellulose muaj kev hais ua.

2. Solubility:

Qhov sib txawv ntawm HPMC thiab Hemc yog lawv tus cwj pwm solubility. HPMC cov khoom pov thawj ua kom zoo dua solubility hauv dej txias piv rau hemc. Cov cuab yeej no yog qhov tseem ceeb rau cov ntawv thov uas yuav tsum muaj kev sib cais nrawm dua lossis dispersion ntawm cov polymers, xws li nyob rau hauv cov chaw lag luam thiab kev tsim kho.

3. Dej khaws cia:

HPMC feem ntau muaj lub peev xwm ua kom muaj peev xwm ua kom muaj lub peev xwm zoo dua li Hemc. Cov cuab yeej no yog qhov tseem ceeb hauv cov ntawv thov xws li cov tshuab xass-raws li cov dej tuav tseg pab tswj cov txheej txheem hydration thiab txhim kho kev ua haujlwm.

4. Gel kub:

Gelling kub yog qhov kub ntawm uas ib qho kev daws teeb meem lossis kev tawg hloov mus rau hauv lub gel. HEMC feem ntau cov qauv gels ntawm qis kub dua HPMC. Cov cuab yeej no yuav pab tau zoo nyob rau hauv cov ntawv thov xws li cov khoom lag luam khoom noj, qhov chaw qis dua kev ua haujlwm rau kev ua.

5.Rheological yam ntxwv:

Ob tus HPMC thiab Hemc pab txhawb rau kev coj ua tus cwj pwm ntawm cov kev daws teeb meem lossis kev tawg. Txawm li cas los xij, lawv cov kev cuam tshuam rau viscosposity thiab shear thinning tus cwj pwm yuav txawv. HEMC feem ntau muaj cov viscosities ntau dua ntawm cov khoom qis dua, ua rau nws haum rau qee cov ntawv thov.

6. Zaj duab xis tsim:

HPMC thiab Hemc tuaj yeem ua cov yeeb yaj kiab nyias thaum ua ntawv thov rau cov chaw. Nyob ntawm cov cellulose ether siv, cov yeeb yaj kiab nthuav tawm cov khoom sib txawv. HPMC cov yeeb yaj kiab feem ntau yog hloov tau yooj yim, thaum hemc zaj duab xis muaj ntau nkig. Cov cuab yeej no cuam tshuam rau lawv cov kev siv ua cov txheej txheej, cov nplaum thiab lwm yam kev siv ua yeeb yaj kiab.

7. Kev sib xyaw nrog lwm cov tebchaw:

Qhov kev xaiv ntawm HPMC thiab Hemc kuj nyob ntawm lawv qhov sib raug zoo nrog lwm cov chaw sib txuas. Piv txwv li, HPMC feem ntau nyiam hauv cov tshuaj formector vim nws compatibility nrog ntau yam khoom xyaw ua si raws li nws cov cwj pwm tshwj xeeb.

8. Thermal stability:

Ob txhais ob leeg kev ua kom muaj kev hais ua kom pom zoo thermal stability, tab sis qhov kub thiab txias uas lawv thuam tej zaum yuav txawv. HPMC nyhav kom tau ntau dua thermal stability piv rau HEMC. Cov yeeb yam no yog qhov tseem ceeb hauv cov ntawv thov uas muaj qhov kub yog qhov kev txiav txim siab.

Txawm hais tias HPMC thiab Hemc qhia ib qho cellulose bycleumin, lawv cov tshuaj uas muaj cov tshuaj sib hloov ua tau zoo sib txawv thiab tshuaj lom neeg. Nkag siab cov kev sib txawv no yog qhov tseem ceeb los xaiv cov cellulose tsim nyog ether rau ib daim ntawv thov, kom ua tau zoo thiab ua haujlwm. Qhov kev xaiv ntawm HPMC thiab Hemc nyob ntawm qhov tshwj xeeb ntawm daim ntawv thov, xws li kev siv khoom siv rau cov zaub mov thiab cov txheej txheem.