Dab tsi yog qhov txawv ntawm xanthan gum thiab HEC?

Xanthan cov pos hniav thiab Hydroxyethyl cellulose (HEC) yog ob qho tib si siv hydrocolloids hauv ntau lub lag luam, suav nrog zaub mov, tshuaj, tshuaj pleev ib ce, thiab cov khoom tu tus kheej. Txawm hais tias sib koom qee qhov zoo sib xws hauv lawv cov khoom thiab kev siv, muaj qhov sib txawv ntawm ob.

Kev sib xyaw thiab cov qauv:

Xanthan Gum:
Xanthan cov pos hniavyog polysaccharide muab tau los ntawm fermentation ntawm carbohydrates los ntawm cov kab mob Xanthomonas campestris. Nws muaj cov piam thaj, mannose, thiab glucuronic acid units, teem rau hauv cov qauv zoo heev. Cov pob txha caj qaum ntawm xanthan cov pos hniav muaj rov ua dua cov piam thaj thiab mannose, nrog rau sab chains ntawm glucuronic acid thiab acetyl pawg.

HEC (Hydroxyethyl Cellulose):
HECyog ib tug derivative ntawm cellulose, uas yog ib txwm tshwm sim polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Hauv kev tsim cov HEC, ethylene oxide yog reacted nrog cellulose los qhia hydroxyethyl pawg mus rau cellulose qaum. Qhov kev hloov kho no txhim kho cov dej solubility thiab rheological zog ntawm cellulose.

Khoom:

Xanthan Gum:
Viscosity: Xanthan cov pos hniav imparts siab viscosity rau aqueous daws txawm nyob rau hauv tsawg concentrations, ua rau nws ib tug zoo thickening neeg sawv cev.
Shear-thinning tus cwj pwm: Cov kev daws teeb meem uas muaj xanthan cov pos hniav nthuav tawm tus cwj pwm shear-thinning, txhais tau tias lawv tsis tshua muaj viscous nyob rau hauv kev nyuaj siab shear thiab rov qab lawv cov viscosity thaum cov kev ntxhov siab raug tshem tawm.
Stability: Xanthan gum muab kev ruaj ntseg rau emulsions thiab ncua kev kawm ntawv, tiv thaiv theem sib cais.
Compatibility: Nws yog sib xws nrog ntau yam ntawm pH ntau ntau thiab tuaj yeem tiv taus qhov kub thiab txias yam tsis poob nws cov khoom thickening.

HEC:
Viscosity: HEC kuj ua haujlwm ua cov thickener thiab nthuav tawm cov viscosity siab hauv cov tshuaj aqueous.
Tsis-ionic: Tsis zoo li xanthan cov pos hniav, HEC tsis yog-ionic, uas ua rau nws tsis tshua muaj kev hloov pauv hauv pH thiab ionic zog.
Zaj duab xis-forming: HEC cov ntaub ntawv pob tshab thaum ziab, ua rau nws muaj txiaj ntsig zoo hauv cov ntawv thov xws li txheej txheej thiab cov nplaum.
Salt kam rau ua: HEC tswj nws cov viscosity nyob rau hauv lub xub ntiag ntawm ntsev, uas yuav ua tau zoo nyob rau hauv tej formulations.

Kev siv:

Xanthan Gum:
Kev lag luam khoom noj khoom haus: Xanthan cov pos hniav feem ntau yog siv los ua cov stabilizer, thickener, thiab gelling tus neeg sawv cev hauv ntau yam khoom noj, nrog rau cov kua ntses, hnav khaub ncaws, khoom noj khoom haus, thiab cov khoom noj siv mis.
Tshuaj pleev ib ce: Nws yog siv nyob rau hauv tshuaj pleev ib ce formulations xws li cream, lotions, thiab tshuaj txhuam hniav kom viscosity thiab stability.
Roj thiab Roj: Xanthan cov pos hniav yog ua hauj lwm hauv cov dej drilling hauv kev lag luam roj thiab roj los tswj cov viscosity thiab tshem tawm cov khib nyiab.

HEC:
Xim thiab Txheej: HEC yog siv dav hauv cov xim dej, txheej, thiab cov nplaum los tswj cov viscosity, txhim kho cov khoom ntws, thiab txhim kho kev tsim cov yeeb yaj kiab.
Cov Khoom Siv Kho Tus Kheej: Nws yog ib qho khoom muaj nyob rau hauv cov khoom siv tu tus kheej xws li tshuaj zawv plaub hau, tshuaj kho mob, thiab cov tshuaj nplaum vim nws cov khoom ua kom tuab thiab ruaj khov.
Pharmaceuticals: HEC yog siv los ua cov ntawv khi hauv cov ntsiav tshuaj thiab ua cov thickener hauv cov tshuaj ua kua.

Qhov txawv:
Qhov chaw: Xanthan gum yog tsim los ntawm cov kab mob fermentation, whereas HEC yog muab los ntawm cellulose los ntawm kev hloov tshuaj.
Ionic Cim: Xanthan cov pos hniav yog anionic, thaum HEC tsis yog-ionic.
Ntsev rhiab heev: Xanthan cov pos hniav yog rhiab heev rau cov ntsev ntau, qhov HEC tswj nws cov viscosity nyob rau hauv muaj ntsev.
Zaj duab xis tsim: HEC tsim cov yeeb yaj kiab pob tshab thaum ziab, uas tuaj yeem ua tau zoo hauv cov txheej txheem, thaum xanthan cov pos hniav tsis pom cov khoom no.

Viscosity Behavior: Txawm hais tias ob qho tib si xanthan cov pos hniav thiab HEC muab cov viscosity siab, lawv muaj cov cwj pwm txawv rheological. Xanthan gum solutions qhia tus cwj pwm shear-thinning, whereas HEC cov ntsiab lus feem ntau qhia Newtonian tus cwj pwm los yog me ntsis shear-thinning.
Daim ntaub ntawv: Txawm hais tias muaj qee qhov sib tshooj hauv lawv daim ntawv thov, xanthan cov pos hniav feem ntau siv hauv kev lag luam khoom noj thiab ua cov kua dej ntxiv, qhov HEC pom kev siv ntau hauv cov xim, coatings, thiab cov khoom tu tus kheej.

thaum xanthan cov pos hniav thiab HEC sib koom qee qhov zoo sib xws li hydrocolloids siv rau thickening thiab stabilizing aqueous systems, lawv txawv nyob rau hauv lawv qhov chaw, ionic cim, ntsev rhiab heev, zaj duab xis-forming zog, thiab daim ntaub ntawv. Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb rau kev xaiv cov hydrocolloid tsim nyog rau cov qauv tsim tshwj xeeb thiab cov khoom xav tau.