Qhov txawv ntawm HEC thiab CMC yog dab tsi?

HEC thiab CMC yog ob hom cellulose ether, polysaccharide uas muaj nyob hauv cov nroj tsuag thiab siv ntau yam khoom. Thaum ob qho tib si tau muab los ntawm cellulose, lawv muaj cov khoom sib txawv thiab kev siv.

HEC, los yog hydroxyethyl cellulose, yog non-ionic, dej-soluble polymer muab los ntawm cellulose. Nws yog siv los ua tus neeg sawv cev thickening, emulsifier, stabilizer, thiab tshem tawm tus neeg sawv cev hauv ntau yam khoom, suav nrog tshuaj pleev ib ce, tshuaj, thiab khoom noj khoom haus. HEC kuj tseem siv los ua kom cov viscosity ntawm cov tshuaj aqueous thiab txhim kho kev ntxhib los mos ntawm cov khoom. Nws kuj tseem siv rau hauv kev tsim cov ntawv, xim, thiab cov nplaum.

CMC, los yog carboxymethyl cellulose, yog cov dej-soluble polymer muab tau los ntawm cellulose. Nws yog siv los ua tus neeg sawv cev thickening, emulsifier, stabilizer, thiab tshem tawm tus neeg sawv cev hauv ntau yam khoom, suav nrog tshuaj pleev ib ce, tshuaj, thiab khoom noj khoom haus. CMC kuj tseem siv los ua kom cov viscosity ntawm cov tshuaj aqueous thiab txhim kho kev ntxhib los mos ntawm cov khoom. Nws kuj tseem siv rau hauv kev tsim cov ntawv, xim, thiab cov nplaum.

Qhov sib txawv tseem ceeb ntawm HEC thiab CMC yog nyob rau hauv lawv cov qauv tshuaj. HEC yog non-ionic polymer, txhais tau tias nws tsis muaj nqi cuam tshuam nrog nws. CMC, ntawm qhov tod tes, yog ionic polymer, txhais tau hais tias nws muaj tus nqi tsis zoo cuam tshuam nrog nws. Qhov sib txawv ntawm tus nqi no cuam tshuam rau txoj kev uas ob lub polymers cuam tshuam nrog lwm cov molecules, thiab yog li cuam tshuam rau lawv cov khoom thiab kev siv.

HEC yog soluble hauv dej ntau dua li CMC, thiab ua haujlwm zoo dua li cov neeg ua kom tuab. Nws kuj tseem ruaj khov nyob rau hauv acidic thiab alkaline daws, thiab yog ntau resistant rau tshav kub thiab lub teeb. HEC kuj tseem tiv taus microbial degradation, ua rau nws xaiv zoo dua rau cov khoom uas xav tau lub txee ntev dua.

CMC yog cov dej soluble tsawg dua HEC, thiab tsis tshua muaj txiaj ntsig zoo li cov neeg ua kom tuab. Nws tseem tsis tshua ruaj khov nyob rau hauv acidic thiab alkaline daws, thiab tsis tshua muaj resistant rau tshav kub thiab lub teeb. CMC kuj tseem cuam tshuam rau microbial degradation, ua rau nws tsis tsim nyog xaiv rau cov khoom uas xav tau lub txee ntev dua.

Hauv kev xaus, HEC thiab CMC yog ob hom cellulose ether nrog cov khoom sib txawv thiab kev siv. HEC yog ntau soluble nyob rau hauv dej thiab yog zoo dua li ib tug thickening tus neeg saib xyuas, thaum CMC yog tsawg soluble nyob rau hauv dej thiab tsis tshua muaj txiaj ntsim raws li ib tug thickening neeg sawv cev. HEC kuj tseem ruaj khov nyob rau hauv acidic thiab alkaline daws, thiab tiv taus cua sov thiab lub teeb. CMC tsis ruaj khov nyob rau hauv acidic thiab alkaline daws, thiab tsis tshua muaj resistant rau tshav kub thiab lub teeb. Ob lub polymers muaj ntau yam kev siv hauv kev tsim cov tshuaj pleev ib ce, tshuaj, khoom noj khoom haus, ntawv, xim, thiab cov nplaum.