Hydroxyprropyrcethylcellose (HPMC) yog lub cellulose derivative feem ntau siv nyob rau hauv cov khoom ntawm ntau yam khoom, suav nrog cov dej ua kom dej. Nws ua raws li kev ua tuab ntau yam ntxiv, muab viscosity thiab kev ruaj khov rau cov kua ua kom zoo.
HPMC Txheej txheem cej luam:
HPMC yog kev hloov kho hluavtaws ntawm cellulose, lub ntuj muaj zog pom hauv tsob ntoo cell phab ntsa. Nws yog tsim los ntawm kev siv cellulose siv cov epylene oxide thiab methyl chloride. Cov khoom lag luam yog dej-soluble polymer nrog cov khoom sib txawv.
Lub luag haujlwm ntawm HPMC hauv cov dej ntxuav tais diav:
Viscosity tswj: ib qho ntawm cov haujlwm tseem ceeb ntawm HPMC hauv cov kua dej ntxuav kom huv yog txhawm rau tswj viscosity. Nws muab cov kua qee qhov sib xws, txhim kho nws cov kev ntxhib los tag nrho thiab cov dej ntws. Qhov no yog qhov tseem ceeb kom ntseeg tau tias txoj kev ntxhua khaub ncaws tau nyob rau saum npoo thiab tshem tawm cov roj thiab gime.
Stability: HPMC txhim kho cov qauv kev ruaj ntseg los ntawm kev tiv thaiv theem sib cais thiab nag lossis daus. Nws pab ua kom cov khoom lag luam zoo nkauj thiab ruaj khov raws sijhawm, ua kom muaj kev ua tau zoo ib yam.
Txhim kho cov laj thawj: Ntxiv rau nws cov nyhuv tuab, HPMC kuj tseem pab txhim kho cov khoom ua npuas dej ntawm cov tshuab ntxuav tais diav. Nws pab tsim cov npaus ruaj khov uas pab hauv cov txheej txheem ntxuav los ntawm cov cuab yeej thiab tshem cov av thiab av.
Sib xyaw nrog surfactants: tais diav dej ua kua muaj surfactants, uas yog qhov tseem ceeb rau kev tawg roj. HPMC tau sib haum nrog ntau yam ntawm surfactants, ua rau nws cov tuab tuab rau cov qauv no.
Ib puag ncig kev txiav txim siab: HPMC yog suav tias yog ib puag ncig ua phooj ywg thiab muaj kev nyab xeeb rau kev siv hauv cov khoom hauv tsev. Nws yog biodegradable thiab tsis ua rau tib neeg kev noj qab haus huv lossis ib puag ncig.
Cov ntawv thov thiab cov qauv:
HPMC feem ntau ntxiv rau cov tshuaj ntxuav tais diav ua cov qauv ua kua rau thaum lub sijhawm tsim khoom. Tus nqi ntawm HPMC siv nyob ntawm qhov xav tau viscosity thiab lwm yam uas muaj tshwj xeeb ntawm cov khoom. Cov kws tsim cov qauv xav txog cov khoom xws li hom surfactant thiab concentration, Ph theem, thiab cov hom phiaj ua tau zoo tshaj plaws.
HydroxyPropyyl methylcellose (HPMC) ua lub luag haujlwm tseem ceeb li cov tuab ua cov dej ntxuav tais diav kua, muab viscosity tswj, ruaj khov thiab txhim kho foaming. Nws cov kev sib raug zoo nrog surfactants thiab ib puag ncig kev ua phooj ywg ua rau nws muaj kev xaiv nrov hauv tsev neeg tu cov khoom lag luam.
Lub Sijhawm Post: Jan-29-2024