Hydroxypropyl methylcellulose (HPMC)yog ib qho cellulose ether nonionic nrog kev sib raug zoo zoo heev, kev ruaj khov tshuaj, thiab cov khoom ua zaj duab xis. Nws yog siv dav hauv kev lag luam tshuaj hauv cov ntsiav tshuaj, tshuaj ntsiav, gels, cov qauv tswj kev tso tawm, thiab cov tshuaj pleev. Ua ib qho polymer muaj kev nyab xeeb thiab tsis muaj tshuaj lom, HPMC sib xyaw cov txiaj ntsig ntawm ob qho tib si ntuj thiab cov polymers hluavtaws, ua rau nws yog ib qho khoom siv tseem ceeb hauv cov qauv tshuaj niaj hnub.
HPMC ua lub luag haujlwm tseem ceeb hauv cov tshuaj ntsiav. Nws feem ntau siv ua cov khoom sib txuas, cov khoom tawg, thiab cov khoom siv txheej. Ua ib qho khoom sib txuas, HPMC txhim kho lub zog khi ntawm cov hmoov hmoov thaum lub sijhawm ntsiav tshuaj, muab cov ntsiav tshuaj tawv thiab ruaj khov. Ntxiv mus, nws cov khoom tawg zoo heev thiab o tuaj yeem txhawb kev tso tshuaj hauv txoj hnyuv. Thaum siv ua cov khoom siv txheej zaj duab xis, zaj duab xis pob tshab lossis pob tshab uas tsim los ntawm HPMC zoo cais cov dej noo thiab oxygen, txhim kho kev ruaj khov thiab tsos ntawm cov tshuaj. Nws cov khoom zoo heev-ua zaj duab xis, tiv taus kua qaub, thiab tsis saj ua rau nws yog cov khoom siv txheej zoo tagnrho rau kev hloov gelatin.
HPMC ua lub luag haujlwm tseem ceeb hauv cov tshuaj uas tswj tau qhov tso tawm. Vim nws tswj tau qhov o thiab cov khoom ua gel hauv dej, nws feem ntau siv ua cov khoom siv matrix hauv cov txheej txheem tso tawm lossis tswj tau qhov tso tawm. Thaum lub ntsiav tshuaj kov cov kua hauv plab, txheej sab nraud ntawm HPMC sai sai tsim cov viscoelastic gel barrier, uas cov tshuaj maj mam tso tawm los ntawm kev sib kis lossis kev yaj, ua tiav kev tso tawm ntev. Los ntawm kev kho qhov degree ntawm kev hloov pauv (methoxy thiab hydroxypropoxy cov ntsiab lus) thiab qhov hnyav molecular ntawm HPMC, tus nqi thiab lub sijhawm ntawm kev tso tawm tshuaj tuaj yeem tswj tau meej. Cov khoom no yog qhov tseem ceeb tshwj xeeb hauv kev kho mob ntawm cov mob ntev xws li ntshav siab, ntshav qab zib, thiab kab mob plawv, qhov twg kev tswj cov tshuaj hauv cov ntshav tas li yog qhov tseem ceeb.
Hauv cov ntawv tshuaj ntsiav, HPMC yog siv dav ua cov khoom siv tseem ceeb rau cov plhaub tshuaj ntsiav uas ua los ntawm cov nroj tsuag. Piv rau cov tshuaj ntsiav gelatin ib txwm muaj, HPMC tshuaj ntsiav tsis txwv los ntawm tsiaj txhu, ua rau lawv haum rau cov neeg tsis noj nqaij thiab cov neeg uas muaj kev cai dab qhuas txwv tsis pub noj. Ntxiv mus, lawv tsis hnov mob rau qhov kub thiab txias hloov pauv thiab muaj lub zog zoo heev thiab cov khoom kaw, txhim kho kev ruaj khov ntawm kev khaws cia tshuaj. HPMC tshuaj ntsiav kuj tseem tuaj yeem coated nrog cov txheej txheej qeeb lossis enteric, uas tso cai rau kev tsim cov chaw tso tawm tshwj xeeb rau cov tshuaj sib txawv.
HPMC kuj tseem siv tau rau hauv kev npaj tshuaj pleev qhov muag thiab tshuaj pleev rau sab nraud. Hauv cov kua muag cuav thiab cov tshuaj pleev qhov muag, HPMC ua haujlwm ua tus hloov pauv viscosity thiab roj nplua nyeem, ua kom cov tshuaj nyob ntev rau ntawm qhov muag, txo cov tsos mob ntawm qhov muag qhuav thiab txhim kho kev nqus tshuaj. Hauv cov tshuaj pleev, gels, lossis daim ntaub pleev rau sab nraud, HPMC muaj cov yam ntxwv zoo heev rau kev tsim cov zaj duab xis thiab ua kom noo noo, ua rau nws yog cov khoom siv matrix uas muaj txiaj ntsig zoo rau kev txhim kho kev nplaum thiab kev nkag mus ntawm cov tshuaj rau ntawm daim tawv nqaij. Nws cov yam ntxwv tsis ua rau khaus thiab tsis ua rau ua xua tau ua rau nws siv dav hauv kev npaj tshuaj pleev rau daim tawv nqaij thiab tshuaj pleev rau sab nraud.
HPMC txoj kev nyab xeeb thiab kev lwj ntawm lub cev kuj tseem ceeb heev rau nws txoj kev siv dav. Nws tsis nqus lossis metabolized los ntawm tib neeg lub cev, tsis muaj tshuaj lom thiab tsis ua xua, thiab raug tso tawm nrog cov kua dej hauv lub cev, ua tau raws li cov qauv nruj rau cov tshuaj siv los ntawm cov kws muag tshuaj thoob ntiaj teb. Nws ruaj khov hauv tshuaj, tsis muaj kev cuam tshuam nrog feem ntau cov tshuaj, thiab tswj nws cov qauv kev ua haujlwm hauv ob qho tib si acidic thiab alkaline ib puag ncig.
Hydroxypropyl methylcellulose, nrog nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb thiab kev sib raug zoo zoo heev, qhia txog nws cov txiaj ntsig ntau yam hauv kev lag luam tshuaj. Txij li cov tshuaj pleev xim rau cov ntsiav tshuaj mus rau cov txheej txheem tswj kev tso tawm, los ntawm cov plhaub tshuaj ntsiav mus rau cov tshuaj pleev xim,HPMCtsis yog tsuas yog txhim kho kev ruaj khov ntawm cov tshuaj thiab kev tswj kev tso tawm xwb tab sis kuj tseem tsav kev tsim kho tshiab thiab kev txhim kho hauv cov thev naus laus zis niaj hnub. Raws li kev lag luam tshuaj hloov zuj zus mus rau qhov ntsuab dua, muaj kev nyab xeeb dua, thiab cov qauv meej dua, cov kev cia siab ntawm daim ntawv thov ntawm HPMC yuav txuas ntxiv nthuav dav, ua rau nws yog tus neeg ua si tseem ceeb hauv cov tshuaj ua haujlwm siab.
Lub sijhawm tshaj tawm: Lub Kaum Hli-13-2025