HydroxyPropyyl methylcellose (HPMC) yog cov khoom lag luam ntau ntau yam zoo li cov chaw ua tshuaj, thiab lwm yam ua rau nws muaj cov khoom muaj txiaj ntsig zoo hauv ntau cov khoom lag luam. Ntawm no yog kev tshawb nrhiav HPMC:
1. Cov yam ntxwv ntawm HPMC:
Tus qauv tshuaj lom neeg: HPMC yog muab tau los ntawm cellulose, lub ntuj polymer pom hauv cov nroj tsuag. Nws yog synthesized los ntawm kev siv cellulation cellulose nrog cov tshuaj pleev cov tshuaj pleev thiab methyl chloride. Cov degree ntawm kev hloov chaw ntawm hydroxypropyl thiab mexoxy pab pawg txiav txim siab nws cov khoom.
Solubility: HPMC yog soluble hauv dej hla ntau qhov kub. Solubility nyob ntawm seb tus degree ntawm hloov chaw thiab hnyav hnyav ntawm cov polymer. Siab dua hloov cov qib ua rau kom cov dej solubility ntau.
Viscosity: HPMC cov khoom ua pov thawj pseudoplastic lossis shear-thinning tus cwj pwm, lub ntsiab lus uas nws viscosity txo qis nyob rau hauv shear kev ntxhov siabp kev ntxhov siab. Lub viscos ntawm HPMC cov kev daws teeb meem tuaj yeem hloov kho los ntawm kev kho cov tsis muaj zog xws li qhov hnyav molecular, cov qib hloov chaw, thiab siab.
Zaj duab xis tsim: HPMC cov ntaub ntawv ntshiab thiab hloov tau cov yeeb yaj kiab tshiab thaum nrum los ntawm kev daws. Zaj duab xis muaj peev xwm hloov tuaj yeem hloov kho los ntawm kev kho polymer polymer concentration thiab muaj cov yas.
Thermal Stability: HPMC muaj zoo thermal ruaj khov, nrog kev txiav txim siab kub feem ntau yog tshaj 200 ° C. Qhov no ua rau nws haum rau ntau txoj kev ua, suav nrog qhov kub yaj txiav thiab txhaj tshuaj molding.
Hydrophilicity: Vim tias nws Hydrophilic Xwm, HPMC tuaj yeem nqus thiab khaws cov dej ntau. Cov cuab yeej no yog qhov zoo hauv kev siv xws li kev tswj hwm tshuaj thiab raws li tus neeg sawv cev ua kom tuab hauv aqueous.
Kev sib txuam: HPMC tau sib haum nrog ntau yam khoom siv, suav nrog lwm cov tshuaj polymers, cov tshuab yas, thiab cov khoom xyaw (APIs). Qhov kev sib xyaw no tso cai rau cov tshuab complex los tsim cov qauv nrog cov cim customized.
Cov yam ntxwv tsis-ionic: HPMC yog cov tsis-ionic polymer, uas txhais tau tias nws tsis nqa ib qho hluav taws xob. Cov cuab yeej no txo kev sib cuam tshuam nrog cov tsiaj uas them rau hauv cov qauv tsim thiab txhim kho nws qhov ruaj khov hauv kev daws teeb meem.
2.hpmc functions:
Kev kho: Hauv cov ntsiav tshuaj ua qauv, HPMC ua raws li cov phau ntawv, txhawb nqa cov khoom nplaum ntawm cov khoom thiab nce ntxiv cov neeg kho tshuab lub zog ntawm cov ntsiav tshuaj. Nws tseem yuav pab cov ntsiav tshuaj uas tsis sib xws tom qab kev siv.
Zaj duab xis txheej: HPMC tau dav siv raws li zaj duab xis txheej tus neeg sawv cev rau cov ntsiav tshuaj thiab tsiav tshuaj. Nws tsim cov khaub ncaws hnav, kev tiv thaiv txheej npog qhov ncauj qhov ncauj thiab tsw ntxhiab ntawm cov tshuaj, txhim kho kev nyab xeeb, thiab ua kom yooj yim.
Kev txhawb nqa Rustained: HPMC tuaj yeem siv los tswj cov tshuaj tso tawm ntawm cov tshuaj los ntawm cov ntaub ntawv tshuaj. Los ntawm hydrating los tsim cov txheej gel, HPMC tuaj yeem ncua kev tso yeeb tshuaj thiab muab kev cuam tshuam kev cuam tshuam kev cuam tshuam.
Viscosity Hloov: Nyob rau hauv lub tshuab muaj aqueous, HPMC ua raws li lub piscosity concifi lossis cov tuab tuab. Nws imparts pseudoplastic ntws tus cwj pwm, txhim kho kev ruaj ntseg thiab kev ua tiav kev ua tau zoo xws li cream, tshuaj thiab cov roj.
Cov neeg sawv cev ncua sijhawm: HPMC yog siv los tswj kev ncua ntawm cov khoom siv insoluble insolule hauv cov kua formulations. Nws tiv thaiv tswm los ntawm nce lub viscosity ntawm kev nruam theem thiab txhim kho cov ntsiab lus discersion.
Emulsifier: In emulsion formulations, HPMC stabilizes the interface between the oil and water phases, preventing phase separation and emulsification. Nws txhim kho lub neej ruaj khov thiab lub zog txee ntawm cov tshuaj pleev hauv cov khoom xws li cream, tshuaj pleev thiab tshuaj pleev.
Hydrogel tsim: HPMC tuaj yeem tsim cov hydrogels thaum hydrated, ua rau nws muaj txiaj ntsig zoo nyob rau hauv qhov kev phom cov khaub ncaws, cov iav ntsiab muag, thiab cov tshuaj xa tshuaj. Cov hydrogels no muab ib puag ncig ntub rau qhov ua kom qhov ua kom zoo thiab tuaj yeem thauj khoom nrog cov tshuaj rau kev xa khoom hauv zos.
Tus neeg saib xyuas tuab: HPMC feem ntau siv los ua cov neeg sawv cev tuab hauv cov khoom noj khoom haus xws li cov kua nplaum, hnav khaub ncaws thiab khoom qab zib. Nws imparts ib tug du qauv thiab txhim kho kom tau saj tsis muaj kev hloov tsw lossis cov ntsiab lus noj zaub mov zoo.
Kev Tsim Kho Ntxiv: Hauv kev tsim kho kev tsim khoom: HPMC yog siv los ua cov dej hauv cov dej hauv cov tub sab paj nruag Mortars thiab plasters. Nws txhim kho kev ua haujlwm, cov nplaum, thiab txo kev tawg los ntawm cov dej qeeb qeeb evaporation.
Kev hloov pauv saum npoo: HPMC tuaj yeem hloov kho cov khoom saum npoo av ntawm cov khoom ua haujlwm xws li ntawv, textiles thiab ceramics. Nws txhim kho lub tshuab luam ntawv, adhesion thiab cov teeb meem ntawm cov khoom siv ntawm cov txheej txheem thiab cov yeeb yaj kiab.
Hydroxypropylropencellulose (HPMC) yog cov polymer ntau yam nrog ntau yam ntawm cov khoom thiab cov haujlwm. Nws cov solubility, viscosity, yeeb yaj kiab ua yeeb yaj kiab thiab sib xyaw ua rau nws muaj cov khoom xyaw tsis tseem ceeb nyob rau hauv ntau daim ntawv thov hla kev lag luam. Los ntawm cov kws tshuaj nqa khoom siv rau cov tshuaj pleev ib ce, HPMC tseem mus ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom lag luam thiab qhov zoo. Raws li kev tshawb fawb thiab thev naus laus zis ua ntej, cov versility ntawm HPMC tuaj yeem nthuav ntxiv, kev tsim kho tsav tsheb tshiab hauv kev tsim qauv thiab kev tsim khoom.
Lub sijhawm Post: Feb-23-2024