Thickener hec hydroxyethyl cellulose

Hydroxyethyl cellulose (HEC) yog ib qho nonionic cellulose derivative uas yog dav siv nyob rau hauv ntau yam lag luam vim nws zoo heev thickening, suspending, thiab emulsifying zog. HEC yog cov dej-soluble polymer uas tuaj yeem yaj tau yooj yim hauv dej txias los tsim cov ntsiab lus ntshiab thiab tsis muaj xim. HEC feem ntau yog siv los ua cov thickener hauv ntau hom kev siv, nrog rau cov txheej txheem, cov nplaum, cov khoom tu tus kheej, thiab cov tshuaj.

HEC yog tsim los ntawm kev hloov kho tej yam ntuj tso cellulose, ib tug polymer uas muaj cov piam thaj units txuas ua ke los ntawm β (1 → 4) glycosidic bonds. Kev hloov pauv ntawm cellulose suav nrog kev qhia cov pab pawg hydroxyethyl (-CH2CH2OH) mus rau cov chav nyob ntawm cov tshuaj anhydroglucose ntawm cov pob txha cellulose. Qhov kev hloov kho no ua rau muaj cov dej-soluble polymer uas tuaj yeem tsim cov ntawv cog lus hydrogen nrog cov dej molecules, ua rau tsim cov kua dej khov.

HEC yog cov thickener zoo vim nws muaj peev xwm tsim cov qauv zoo li gel thaum nws ntxiv rau kev daws teeb meem. Cov pab pawg hydroxyethyl ntawm HEC molecule tuaj yeem cuam tshuam nrog cov dej molecules, uas ua rau tsim cov hydrogen bonds. Cov hydrogen bonds ntawm HEC molecule thiab cov dej molecules ua rau HEC molecule ua hydrated thiab nthuav loj. Raws li HEC molecule nthuav dav, nws tsim cov qauv peb-dimensional network uas ntxiab dej thiab lwm yam khoom tawg, uas ua rau muaj kev nce ntxiv hauv cov viscosity ntawm cov tshuaj.

Lub peev xwm thickening ntawm HEC yog cuam tshuam los ntawm ntau yam, nrog rau cov concentration ntawm HEC hauv cov tshuaj, qhov kub thiab txias, thiab pH. Kev siab dua ntawm HEC hauv cov tshuaj ua rau muaj qhov nce ntxiv hauv viscosity. Txawm li cas los xij, nce qhov concentration ntawm HEC dhau ntawm ib qho taw tes tuaj yeem ua rau txo qis hauv viscosity vim yog tsim cov aggregates. Qhov kub kuj tseem cuam tshuam rau lub peev xwm thickening ntawm HEC, nrog rau qhov kub siab dua ua rau txo qis viscosity. Cov pH ntawm cov tshuaj kuj tuaj yeem cuam tshuam rau lub peev xwm thickening ntawm HEC, nrog rau cov pH siab dua ua rau txo qis viscosity.

HEC feem ntau yog siv los ua cov thickener hauv ntau daim ntawv thov, suav nrog cov txheej thiab cov xim. Hauv cov txheej txheej, HEC tau ntxiv rau cov qauv tsim los txhim kho rheological zog ntawm txheej. Cov khoom rheological ntawm cov txheej txheej hais txog nws lub peev xwm ntws thiab qib ntawm ib qho chaw. HEC tuaj yeem txhim kho cov dej ntws thiab qib qib ntawm cov txheej txheem los ntawm kev ua kom nws cov viscosity thiab txo nws txoj kev sagging. HEC tseem tuaj yeem txhim kho qhov ruaj khov ntawm cov txheej txheem los ntawm kev tiv thaiv kev daws ntawm cov xim thiab lwm yam khoom khib nyiab.

Hauv cov nplaum, HEC yog siv los ua cov thickener los txhim kho cov viscosity thiab tackiness ntawm cov nplaum. Lub viscosity ntawm cov nplaum yog qhov tseem ceeb rau nws lub peev xwm los ua raws li qhov chaw thiab nyob hauv qhov chaw. HEC tuaj yeem txhim kho cov viscosity ntawm cov nplaum thiab tiv thaiv nws los ntawm dripping lossis khiav. HEC kuj tuaj yeem txhim kho qhov tackiness ntawm cov nplaum, tso cai rau nws ua kom zoo dua rau qhov chaw.

Hauv cov khoom tu tus kheej, HEC yog siv los ua cov thickener thiab stabilizer. HEC feem ntau yog siv hauv cov tshuaj zawv plaub hau, tshuaj kho mob, thiab tshuaj ntxuav lub cev los txhim kho lawv cov viscosity thiab kev ntxhib los mos. HEC tseem tuaj yeem txhim kho kev ruaj ntseg ntawm cov khoom no los ntawm kev tiv thaiv theem kev sib cais thiab daws cov khib nyiab.

Hauv cov tshuaj, HEC yog siv los ua cov thickener thiab tshem tawm tus neeg sawv cev. HEC feem ntau yog siv rau hauv qhov ncauj tshem tawm kom tshem tawm cov tshuaj insoluble hauv cov kua nruab nrab. HEC kuj tseem siv tau los ua cov thickener hauv cov tshuaj pleev ib ce thiab cov gels los txhim kho lawv cov viscosity thiab kev ntxhib los mos.

Nyob rau hauv xaus, HEC yog ib tug dej-soluble polymer uas yog dav siv raws li ib tug thickener nyob rau hauv ntau yam lag luam vim nws zoo heev thickening, ncua, thiab emulsifying zog.