Hydroxyethyl cellulose (HEC) thiab hydroxypropyl cellulose (HPC) yog ob qho tib si derivetives ntawm cellulose, ib tug nev tshwm sim hauv cov nroj tsuag. Lawv tau siv dav hauv ntau yam kev lag luam, suav nrog cov tshuaj, tshuaj pleev, khoom noj khoom haus, thiab kev tsim kho, vim lawv cov khoom tshwj xeeb. Thaum ob qho tib si HEC thiab HPC sib faib cov qauv tshuaj thiab cov ntawv thov, lawv kuj muaj qhov sib txawv uas ua rau lawv haum rau cov hom phiaj sib txawv.
Tus qauv tshuaj:
HEC: Hydroxyethyl cellulose yog muab los ntawm cellulose los ntawm kev hloov ntawm cov pab pawg hydroxyl nrog cov pab pawg neeg Ethyl nrog cov pab pawg Ethyl nrog Ethyl pawg.
HPC: HydroxyPropyl cellulose yog muab los ntawm cellulose los ntawm kev hloov ntawm hydroxyl pawg nrog cov pab pawg muaj propyl.
Solubility:
HEC: Nws yog soluble hauv ob qho tib si txias thiab dej kub, ua cov kev daws teeb meem.
HPC: Nws yog soluble nyob rau hauv dej txias tab sis cov ntaub ua cov kev daws teeb meem hauv dej kub.
Viscosity:
HEC: Feem ntau, HEC cov khoom pov thawj ntau dua viscosity rau HPC, tshwj xeeb tshaj yog nyob rau hauv qis dua.
HPC: HPC feem ntau muaj qis viscosity rau HEC, ua rau nws tsim nyog dua rau cov ntawv thov uas txo cov kev xav tau.
Thermal Stability:
HEC: HEC paub txog nws qhov zoo thermal ruaj khov, ua rau nws haum rau cov ntawv thov uas yuav tau txais kev kub siab.
HPC: HPC tseem ua rau cov khoom siv hluav taws xob zoo tab sis tej zaum yuav muaj qhov kub me me ntawm daim ntawv thov piv rau HEC vim nws cov qauv tshuaj sib txawv.
Kev sib haum:
HEC: Nws tau tshaj tawm ntau yam ntawm lwm cov khoom xyaw, suav nrog surfactants, ntsev, thiab lwm cov polymers.
HPC: Ib qho zoo sib xws, HPC tseem tau tshaj ntau yam ntxiv siv hauv kev lag luam xws li cov tshuaj thiab cov tshuaj pleev ib ce.
Zaj duab xis tsim cov khoom:
HEC: HEC muaj cov khoom siv ua yeeb yaj kiab zoo, ua kom haum rau cov ntawv thov uas yuav tsum muaj, xws li ua cov nplaum thiab cov nplaum.
HPC: HPC tseem ua yeeb yam ua yeeb yam yeeb yaj kiab, txawm hais tias muaj cov yam ntxwv sib txawv me ntsis piv rau HEC, nyob ntawm cov kev cai thov tshwj xeeb.
Hydration:
HEC: HEC muaj qib siab ntawm cov dej, ua rau nws muaj peev xwm los ua cov kev daws teeb meem meej thiab ruaj khov hauv dej.
HPC: HPC kuj hydrates zoo nyob rau hauv dej, txawm hais tias qib degration yuav sib txawv nyob ntawm cov yam kub xws li kub thiab siab.
Cov Ntawv Thov:
HEC: Vim nws cov viscosity thiab zoo heev cov dej solubility, HEC yog feem ntau siv los ua tus neeg sawv cev tuab, thiab dej ntxuav, tshuaj ntxuav tes, tshuaj ntxuav tshuaj, thiab tshuaj ntxuav tes, thiab tshuaj ntsiav.
HPC: HPC qhov qis viscosity thiab cov dej ua kom haum rau cov kev siv tshuaj ntsuab, xws li cov tshuaj kho mob qis dua, thiab raws li phau ntawv qhia txog cov tshuaj.
Thaum ob qho tib si hydroxyethyl cellulose (HEC) thiab hydroxypropyl cellulose (HPC) yog cov khoom siv cellulropal, solubcosity, zaj duab xis, zaj duab xis, zaj duab xis, zaj duab xis, ua yeeb yam hydring, thiab cov ntawv thov tshwj xeeb. Nkag siab txog cov kev sib txawv no yog qhov tseem ceeb rau kev xaiv cov cellulose feem ntau ua rau cellulose nyiam tshaj plaws rau ib daim ntawv thov lossis cov qauv.
Lub Sijhawm Post: Feb-18-2025