Hydroxyethylcellulose (HEC) thiab hydroxypropylcellulose (HPC) yog ob qho tib si derivatives ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Cov cellulose derivatives no tau siv dav hauv ntau qhov kev lag luam vim lawv cov khoom tshwj xeeb.
Chemical structure:
Hydroxyethylcellulose (HEC):
HEC yog synthesized los ntawm reacting cellulose nrog ethylene oxide.
Hauv cov qauv tshuaj ntawm HEC, pawg hydroxyethyl tau nkag mus rau hauv cov pob txha cellulose.
Qhov degree ntawm kev hloov pauv (DS) sawv cev rau qhov nruab nrab ntawm cov pawg hydroxyethyl ib chav tsev piam thaj hauv cov saw cellulose.
Hydroxypropylcellulose (HPC):
HPC yog tsim los ntawm kev kho cellulose nrog propylene oxide.
Thaum lub sij hawm txheej txheem synthesis, pawg hydroxypropyl tau ntxiv rau cov qauv cellulose.
Zoo ib yam li HEC, qib kev hloov pauv yog siv los ntsuas qhov ntsuas ntawm hydroxypropyl hloov pauv hauv cellulose molecule.
yam ntxwv:
Hydroxyethylcellulose (HEC):
HEC paub txog nws cov peev xwm khaws dej zoo heev, ua rau nws muaj ntau yam khoom siv hauv ntau hom kev siv thickening thiab gelling.
Nws tsim ib qho kev daws teeb meem hauv dej thiab nthuav tawm tus cwj pwm pseudoplastic, uas txhais tau tias nws tsis tshua muaj kuab paug nyob rau hauv shear stress.
HEC feem ntau yog siv rau hauv kev tsim cov khoom siv tu tus kheej, tshuaj, thiab ua cov thickener hauv dej-raws li txheej.
Hydroxypropylcellulose (HPC):
HPC kuj muaj cov dej solubility zoo thiab cov khoom ua yeeb yaj kiab.
Nws muaj ntau yam kev sib raug zoo nrog cov kuab tshuaj sib txawv dua li HEC.
HPC feem ntau yog siv los ua ib qho kev sib khi hauv cov tshuaj formulations, cov khoom kho qhov ncauj, thiab cov ntsiav tshuaj ntau lawm.
daim ntawv thov:
Hydroxyethylcellulose (HEC):
Nws yog dav siv nyob rau hauv cov tshuaj pleev ib ce thiab kev kho tus kheej industries raws li ib tug thickener nyob rau hauv tshuaj zawv plaub hau, tshuaj pleev ib ce thiab cream.
Siv ua stabilizer thiab viscosity regulator nyob rau hauv cov tshuaj formulations.
Siv rau hauv kev tsim cov xim pleev xim rau hauv dej thiab coatings.
Hydroxypropylcellulose (HPC):
Feem ntau siv nyob rau hauv kev siv tshuaj, tshwj xeeb tshaj yog raws li ib tug binder nyob rau hauv kev tsim cov ntsiav tshuaj.
Nws yog siv rau hauv cov khoom kho qhov ncauj xws li tshuaj txhuam hniav rau nws cov khoom thickening.
Nws tuaj yeem siv rau hauv kev tswj cov tshuaj xa tawm.
Thaum hydroxyethyl cellulose (HEC) thiab hydroxypropyl cellulose (HPC) qhia qee qhov zoo sib xws vim lawv cov keeb kwm ntawm cellulose, lawv txawv hauv cov qauv tshuaj, khoom, thiab kev siv. HEC feem ntau nyiam nyob hauv kev saib xyuas tus kheej thiab txheej txheej txheej rau nws cov dej tuav thiab ua kom tuab, thaum HPC tau siv dav hauv kev lag luam tshuaj, tshwj xeeb hauv kev tsim cov ntsiav tshuaj thiab tswj-tso tshuaj xa cov tshuab. Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb rau kev xaiv cov cellulose derivatives tsim nyog rau cov ntawv thov kev lag luam tshwj xeeb.
Post lub sij hawm: Jan-16-2024