Hydroxyethylulose (HEC) yog tsis-ionic, dej-soluble polymer muab tau los ntawm cellulose. Nws cov qauv tshuaj tshwj xeeb ua rau nws muaj ntau yam khoom xyaw nrog ntau yam kev thov hla kev lag luam xws li kws tshuaj, zaub mov, thiab kev saib xyuas tus kheej. Ib qho ntawm nws cov yam ntxwv uas muaj peev xwm tshwj xeeb yog nws cov kev tshem tawm zoo tshaj plaws, uas ua rau lub luag haujlwm tseem ceeb hauv ntau cov qauv.
Cov qauv thiab cov khoom ntawm HEC
HEC tau muab los ntawm cellulose, uas yog ib qho tshwm sim polymer pom hauv tsob ntoo cell phab ntsa. Los ntawm cov tshuaj lom neeg ntawm cov tshuaj lom neeg, hydroxyethyl pab pawg tau qhia rau lub cellulose pob txha caj qaum, ua rau cov dej-soluble polymer nrog cov khoom muaj txiaj ntsig.
Cov qauv tshuaj: Cov qauv theem pib ntawm cellulose muaj cov chav dej hancose sib txuas ua ke los ntawm β-1,4-glycosidic bonds. Hauv HEC, qee cov ntawm cov pab pawg hydroxyl (-oh) ntawm cov chav dej qab zib yog hloov los ntawm hydroxyethyl (-och2ch2oh) pawg. Qhov no hloov chaw uas cuam tshuam cov dej solubility rau cov polymer thaum tuav tus qauv caj qaum ntawm cellulose.
Dej solubility: Hec yog soluble heev hauv dej, sib sau meej, viscous daws teeb meem. Cov qib degree (ds), uas qhia txog cov pawg nruab nrab ntawm cov dej hli zoo nkauj, cuam tshuam cov polymer's solubility thiab lwm yam khoom. Cov DS cov txiaj ntsig dua feem ntau ua rau cov dej solubility ntau dua.
Viscosity: Hec cov kev daws teeb meem Pseudopastic cwj pwm, txhais tau hais tias lawv viscosity txo qis nyob rau hauv shear kev ntxhov siab. Cov cuab yeej no tau txais txiaj ntsig zoo li cov ntawv thov thiab cov nplaum, uas cov khoom siv tau ntws tau yooj yim thaum tab tom so.
Zaj duab xis tsim: Hec tuaj yeem tsim pob tshab, cov yeeb yaj kiab hloov tau thaum qhuav, ua rau nws siv ua zaj duab xis nyob hauv ntau yam kev siv.
Ncua Cov Khoom Ntawm Hec
Kev kawm raug ncua txog kev muaj peev xwm ntawm cov khoom siv tau kom nyob tsis tau cov kua dawb hauv nruab nrab tsis pub dhau lub sijhawm. HC Kev nthuav tawm cov khoom tau raug tshem tawm zoo heev vim muaj ntau yam:
Cocking thiab o: Thaum Hec hais tawm hauv nruab nrab ua kua, lawv hydrate thiab swell, sib sau ib qho cuab yeej cuab tam uas ntxiab thiab ncua cov khoom. Lub Hydrophilic Xwm ntawm HECARRITATIVE Cov dej ntws mus, ua rau muaj kev nce qib ntxiv thiab txhim kho kev kawm ruaj khov.
Particle loj faib: HEC muaj peev xwm ncua ntau ntau qhov ntau thiab tsawg ntawm cov me me vim nws lub peev xwm los tsim lub network nrog varying Mesh qhov ntau thiab tsawg. Cov versatility no ua rau nws haum rau kev ncua ob qho tib si nplua thiab ntxhib cov lus hauv ntau yam qauv.
Thixotropic Cwj Pwm: HEC cov kev daws teeb meem ua kom pom kev coj ua kom haum xeeb, txhais tau tias lawv viscosity txo qis dua lub sijhawm tsis tu ncua kev ntxhov siab thiab rov qab thaum cov kev ntxhov siab raug tshem tawm. Cov cuab yeej no tso cai rau kom yooj yim pouring thiab daim ntawv thov thaum tswjfab thiab ncua kev ncua.
PE stability: HEC tau ruaj khov tshaj li ntau qhov txiaj ntsig ntawm p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p p P
Cov ntawv thov ntawm HEC hauv kev ncua tawm cov qauv
HEC cov kev tshem tawm zoo heev ua rau nws muaj cov khoom muaj txiaj ntsig zoo hauv ntau cov khoom hla kev lag luam sib txawv:
Cov xim tsev thiab txheej txheem: HEC yog siv los ua cov xim tuab thiab ncua cov xim tsev hauv cov xim pleev xim rau cov dej pleev xim thiab pleev xim los tiv thaiv kev daws cov pigments thiab ntxiv. Nws tus cwj pwm pseudoplastic kev coj ua kom yooj yim muab daim ntawv thov thiab cov kev pab them nqi tsis zoo.
Cov khoom siv saib xyuas tus kheej: hauv cov ntaub thaiv cov khoom, kev ntxuav lub cev, thiab cov tshuaj tsw qab, thiab cov ntxhiab tsw, thiab ua kom muaj kev faib tawm thiab ruaj khov ntawm cov qauv.
Kws Tshuaj Xyuas Kev Kawm Ntawv: HEC tau ua haujlwm hauv kev ncua cov tshuaj kom ncua cov khoom xyaw thiab kev txhim kho lub palatability thiab kev ruaj khov ntawm qhov ncauj cov ntawv sau. Nws qhov kev sib raug zoo nrog ntau yam ntawm APIs (muaj cov khoom xyaw ua haujlwm) thiab kev zam ua rau nws xaiv qhov kev xaiv zoo tshaj plaws rau cov kws sau ntawv.
Cov khoom noj khoom haus thiab dej haus cov khoom lag luam: HEC tau siv hauv cov ntawv thov zaub mov noj xws li cov khoom noj qab zib xws li cov tshuaj ntsuab, cov txuj lom, thiab pulp. Nws cov ntxhiab tsw tsis muaj ntxhiab thiab tas mus li ua rau nws zoo tagnrho rau kev siv hauv cov qauv khoom noj uas tsis muaj kev cuam tshuam cov cwj pwm xav tau.
Hydroxyethylulose (HEC) yog ib qho kev tshem tawm tshwj xeeb nrog cov khoom raug tshem tawm tshwj xeeb, ua rau nws muaj txiaj ntsig zoo hauv ntau cov qauv ntawm kev lag luam hla kev lag luam hla kev lag luam. Nws lub peev xwm yuav tsum tau ncua cov khoom seem uas acyly hauv cov kua tub xov xwm, txuas nrog lwm cov yeeb yam uas nrhiav kom ua tiav rau cov khoom ruaj khov thiab cov khoom lag luam ruaj khov. Raws li kev tshawb nrhiav thiab kev tsim kho kev nthuav dav txuas ntxiv mus ua ntej, cov ntawv thov ntawm HEC hauv kev ncua ntawv ntxiv, tsav cov khoom lag luam tshiab thiab txhim kho cov khoom lag luam tshiab hauv ntau cov nplais.
Lub Sijhawm Post: Lub Tsib Hlis-09-2024