Hydroxyethyl cellulose (HEC) yog cov siv dav siv tsis muaj cuab yeej, dej-soluble polymer muab tau los ntawm cellulose. Nws thawj cov khoom siv hauv cov khoom lag luam txhua hnub los ntawm nws lub peev xwm los hloov kho rheology, ruaj khov cov qauv, thiab txhim kho cov qauv ntawm cov khoom lag luam.
Cov khoom thiab kev siv hluav taws xob ntawm HEC
HEC yog tus cwj pwm los ntawm nws cov thickening, ncua, khi, thiab emulsifying khoom. Nws ua kom muaj pseudoplastic high, txhais tau hais tias nws viscosity txo nyob rau hauv Shear kev nyuaj siab tab sis rov qab rau nws thawj lub xeev ib zaug kev ntxhov siab tau raug tshem tawm. Cov cuab yeej no tau txais txiaj ntsig zoo nyob rau hauv ntau daim ntawv raws li nws tso cai rau cov khoom lag luam tuab thiab ruaj khov ntawm ib qho yooj yim rau kev thov lossis kis tau thaum siv.
Lub tshuab ua qab HEC qhov kev ua tau zoo nyob hauv nws cov qauv molecular. Daim saw polymer tsim lub network uas tuaj yeem cuab dej thiab lwm cov khoom siv, tsim cov gel zoo li matrix. Qhov kev tsim tawm network no yog nyob ntawm cov qib kev hloov pauv thiab qhov hnyav molecular ntawm HEC, uas tuaj yeem hloov kho kom tau viscosity xav tau thiab ruaj khov nyob rau hauv ib tug qauv.
Cuam tshuam rau viscosity
Thickening nyhuv
Hec tseem cuam tshuam lub viscosity ntawm cov khoom siv txhua hnub los ntawm thickening cov aqueous theem. Hauv cov khoom tu tus kheej xws li tshuaj zawv plaub hau thiab tshuaj pleev, tshuaj pleev kom ua rau lub viscosity, coj mus rau tus neeg siv khoom siv nplua nuj thiab txhim kho cov neeg siv khoom siv. Qhov no thickening yog tiav los ntawm kev tswj cov dej ntawm hec, uas muaj cov kab pob cellules, ua rau cov kab mob cellule, ua rau cov tshuaj pleev ib ce.
Qhov kev xav ntawm HEC hauv kev tsim qauv yog qhov tseem ceeb rau kev ua tiav qhov xav tau viscosity. Ntawm cov qis dua, hec thawj feem ntau nce viscosity ntawm cov theem dej yam tsis muaj kev cuam tshuam cov khoom ntws ntau. Ntawm ntau dua cov kev xav, HEC tsim cov gel-zoo li qauv, muab ib qho ruaj khov, ua kom pom tseeb thiab tsis sib xws. Piv txwv li, hauv cov tshuaj zawv plaub hau, hec zoo heev xws li 0.2% mus rau 0.5% tuaj yeem muab viscosity txaus, thaum ntau dua cov yuav siv rau cov kua nplaum lossis tuab.
Shear-thinning tus cwj pwm
Tus lej pseudoplastic xwm ntawm hec pub rau txhua cov khoom siv tshuaj lom rau cov khoom pov thawj rau kev coj tus cwj pwm. Qhov no txhais tau tias nyob rau hauv lub tshuab ua ntawm pouring, pumping, lossis kis mus, viscosity txo, ua rau cov khoom yooj yim los lis thiab thov. Thaum lub zog shear yog tshem tawm, lub viscosity rov rau nws thawj lub xeev, kom cov khoom tseem nyob ruaj khov hauv lub khob.
Piv txwv li, hauv cov kua tshuaj ua kua, hec pab ua tiav kev sib npaug ntawm lub taub hau ruaj khov, tuab cov khoom hauv fwj thiab kua dej yooj yim thaum dispensed. Cov cuab yeej no yog tshwj xeeb tshaj nyob rau hauv cov kev tsim uas yooj yim ntawm daim ntawv thov yog qhov tseem ceeb, xws li nyob rau hauv lotions thiab gels cov kua pleev.
Cuam tshuam rau kev ruaj khov
Raug tshem tawm thiab emulsification
Hec txhim kho kev muaj kuab lom txhua hnub los ntawm kev ua yeeb yam raws li kev ncua tus neeg sawv cev thiab stabilizer. Nws txwv tsis pub muaj kev sib cais ntawm cov khoom siv thiab cov roj hluav taws xob ntawm cov roj ntws hauv emulsions, yog li tswj cov khoom homogeneous dhau sijhawm. Qhov no yog tshwj xeeb yog nyob rau hauv cov qauv muaj insoluble ua, pigments, lossis tshem tawm cov lus.
Nyob rau hauv lotions thiab cream, hec stetiilizes emnetions los ntawm nce lub viscosity ntawm kev mus ncig ua si, yog li txo qhov kev mus ncig ntawm dispersed droplets thiab hais. Lub tshuab hluav taws xob ruaj khov no tseem ceeb heev rau kev tswj hwm qhov sib xws thiab ua haujlwm ntawm cov khoom nyob thoob plaws nws lub txee lub neej. Piv txwv li, hauv cov tshuaj pleev thaiv hnub, HEC pab ua kom UV cov ntxaij lim dej tau faib tawm, kom muaj kev tiv thaiv hluav taws xob zoo sib xws.
Noo noo khaws thiab ua yeeb yaj kiab tsim
Hec tseem pab txhawb rau kev ruaj ntseg ntawm kev ua kom cov dej noo ua kom huv thiab tsim cov yeeb yaj kiab tiv thaiv ntawm daim tawv nqaij lossis plaub hau. Hauv cov khoom tu plaub hau, cov khoom ua yeeb yaj kiab no pab ua yeeb yam thiab tswj hwm lub hairstyle los ntawm kev tuav ya raws thiab muab ib qho thaiv kev tiv thaiv ib puag ncig.
Hauv cov khoom lag luam tawv nqaij, hec txhim kho cov khoom lag luam los ntawm kev txo cov dej poob ntawm daim tawv nqaij, muab cov nyhuv las ntev ntev. Cov cwj pwm no muaj txiaj ntsig zoo nyob rau hauv cov khoom lag luam xws li moisturizers thiab ntsej muag lub ntsej muag, qhov twg tswj cov dej tawv nqaij yog qhov ua haujlwm tseem ceeb.
Cov ntawv thov nyob rau hauv cov khoom lag luam siv tshuaj txhua hnub
Cov Khoom Siv Saib Xyuas Tus Kheej
Hauv kev saib xyuas tus kheej, HEC tau dav siv rau nws cov cua sov thiab ruaj khov. Hauv cov tshuaj zawv plaub hau thiab cov khoom noj kom zoo, nws muab cov viscosity xav tau, thiab txhim kho kev siv zog, ua rau muaj kev paub zoo dua rau cov neeg siv.
Hauv cov khoom tu tawv nqaij xws li cream, pelsions, thiab gels, thiab gels, thiab gels, thiab stabener thiab nplua nuj xav pom ntawm cov khoom. Nws tseem yuav pab hauv cov khoom xyaw nquag, txhim kho txoj kev ua tau zoo ntawm cov khoom.
Khoom Siv Hauv Tsev
Nyob rau hauv tsev neeg tu khoom, HEC ua lub luag haujlwm hauv kev teeb tsa viscosity thiab stabilizing kev ncua. Hauv cov tshuaj ntxuav ua kua thiab ntxuav tais diav ua kua, hEC tseem muaj yooj yim rau kev sib txuas nrog cov chaw txaus, muab kev tu kom huv.
Hauv cov neeg ua yeeb yaj kiab huab cua thiab cov ntaub soft muag, hec pab hauv kev tswj hwm qhov tsis zoo ntawm cov tshuaj tsw qab thiab cov neeg nquag ua haujlwm, ua kom muaj kev kawm zoo ib yam thiab cov neeg siv ntxiag.
Hydroxyethyl cellulose (HEC) yog ib qho ntau yam thiab tseem ceeb ntawm cov qauv ntawm cov khoom siv tshuaj txhua hnub. Nws cov kev cuam tshuam rau viscosity thiab ruaj khov ua rau nws invaluable hauv kev tsim cov khoom lag luam uas tau ntsib cov neeg tau txais kev cia siab rau kev ntxhib los mos, thiab siv tau. Los ntawm kev txhim kho cov tshuaj viscosity, ua kom cov khoom lag luam ruaj khov, thiab txhim kho cov ntawv thov kev ua haujlwm zoo thiab cov neeg siv khoom thov kom muaj ntau yam ntawm kev saib xyuas tus kheej thiab cov khoom lag luam hauv tsev. Raws li qhov kev thov rau cov khoom zoo, ruaj khov, thiab cov neeg siv khoom zoo txuas ntxiv mus nthuav dav, muab cov khoom tshiab, muab cov khoom tshiab rau kev hloov khoom hauv cov khoom siv txhua hnub.
Lub sij hawm Post: Jun-12-2024