Hydroxypropyl methylcellulose (HPMC) yog ib qho khoom siv polymer semi-synthetic, tsis muaj tshuaj lom, ntau yam khoom siv dav dav hauv kev lag luam tshuaj, khoom noj, tshuaj pleev ib ce thiab tshuaj lom neeg. Hauv cov tshuaj ntxuav tes, HPMC tau dhau los ua ib qho khoom siv tseem ceeb vim nws cov khoom zoo heev uas ua rau tuab, ruaj khov, noo noo thiab lwm yam khoom.
1. Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog ib qho cellulose ether compound, uas tau txais los ntawm cellulose ntuj los ntawm kev hloov kho tshuaj lom neeg. Nws cov yam ntxwv tseem ceeb suav nrog:
Kev yaj dej zoo: HPMC tuaj yeem yaj sai sai hauv dej txias los ua cov tshuaj pob tshab thiab khov.
Cov nyhuv thickening: HPMC muaj cov nyhuv thickening zoo heev, tuaj yeem ua rau kom cov viscosity ntawm cov tshuaj ntau ntxiv ntawm cov concentration qis, thiab tsim nyog rau ntau yam kua formulations.
Cov yam ntxwv ntawm kev tsim zaj duab xis: Tom qab dej ua pa, HPMC tuaj yeem tsim cov zaj duab xis uas yoog tau thiab pob tshab los txhim kho kev nplaum ntawm cov tshuaj ntxuav tes.
Kev tiv thaiv kev laus thiab kev ruaj khov tshuaj lom neeg: HPMC muaj kev tsis sib haum xeeb tshuaj lom neeg siab, tuaj yeem ruaj khov hauv ntau yam kev ib puag ncig tshuaj lom neeg, tiv taus kua qaub thiab alkali, thiab yog antioxidant.
Cov khoom ua kom noo noo: HPMC muaj peev xwm ua kom noo noo zoo thiab tuaj yeem ncua qhov poob dej, tshwj xeeb tshaj yog hauv cov tshuaj ntxuav tawv nqaij.
2. Lub tshuab ua haujlwm ntawm HPMC hauv cov tshuaj ntxuav tes
Hauv cov tshuaj ntxuav tes, tshwj xeeb tshaj yog cov tshuaj ntxuav kua, kev ruaj khov yog ib qho ntawm nws cov khoom tseem ceeb. Cov tshuaj ntxuav tes yuav tsum tswj tau lub cev thiab tshuaj lom neeg ruaj khov ntev, thiab HPMC ua lub luag haujlwm tseem ceeb hauv qhov no, feem ntau yog hauv cov hauv qab no:
Tiv thaiv kev sib cais theem: Cov tshuaj ntxuav kua feem ntau muaj ntau yam khoom xyaw xws li dej, surfactants, thickeners, tshuaj tsw qab, thiab lwm yam, uas yooj yim rau kev sib cais theem thaum lub sijhawm khaws cia ntev. Cov nyhuv thickening ntawm HPMC tuaj yeem ua rau kom muaj viscosity ntawm lub kaw lus, ua rau txhua yam khoom sib npaug thiab zam kev stratification thiab nag lossis daus.
Txhim kho kev ruaj khov ntawm cov ua npuas ncauj: Thaum lub sijhawm ntxuav, kev ruaj khov ntawm cov ua npuas ncauj yog qhov tseem ceeb heev. HPMC tuaj yeem ua rau cov kua nplaum ntau ntxiv thiab ncua qhov tawg ntawm cov ua npuas ncauj, yog li txhim kho qhov ruaj khov ntawm cov ua npuas ncauj. Qhov no muaj kev cuam tshuam loj heev rau kev paub txog kev siv cov tshuaj ntxuav tes, tshwj xeeb tshaj yog rau kev ntxuav tes lossis rau cov khoom uas muaj cov ua npuas ncauj ntxuav muaj zog.
Cov nyhuv ua kom tuab dua: Cov nyhuv ua kom tuab ntawm HPMC tuaj yeem ua rau cov tshuaj ntxuav kua muaj cov kua dej zoo dua thiab tiv thaiv lawv kom tsis txhob nyias dhau lossis tuab. Hauv qhov ntau pH, cov nyhuv ua kom tuab ntawm HPMC yog qhov ruaj khov, thiab nws tshwj xeeb tshaj yog rau cov tshuaj ntxuav alkaline heev, xws li cov tshuaj ntxuav khaub ncaws thiab cov kua ntxuav chav dej.
Kev tiv thaiv kev khov thiab kev yaj ruaj khov: Qee cov tshuaj ntxuav tes yuav ua rau cov khoom tawg lossis crystallize hauv qhov kub qis, ua rau cov khoom poob fluidity lossis faib tsis sib npaug. HPMC tuaj yeem txhim kho qhov kev tiv thaiv khov-thaw ntawm cov mis, khaws cov khoom lub cev tsis hloov pauv thaum lub sijhawm rov ua dua khov-thaw, thiab zam kev cuam tshuam rau qhov ua tau zoo ntawm cov tshuaj ntxuav tes.
Tiv thaiv kev nplaum thiab kev tso dej tawm: Hauv cov tshuaj ntxuav uas muaj cov khoom me me (xws li cov khoom me me ntawm cov tshuaj ntxuav lossis cov khoom siv txhuam), HPMC tuaj yeem tiv thaiv cov khoom me me no kom tsis txhob lo rau thaum lub sijhawm khaws cia, ua kom zoo dua qhov kev ruaj khov ntawm cov khoom.
3. Kev siv HPMC rau ntau hom tshuaj ntxuav tes
(1). Cov tshuaj ntxuav khaub ncaws
HPMC siv ua cov khoom ua kom tuab thiab ruaj khov hauv cov tshuaj ntxhua khaub ncaws. Nws lub luag haujlwm tseem ceeb yog tiv thaiv kev sib cais ntawm cov tshuaj ntxhua khaub ncaws, txhim kho kev ruaj khov ntawm cov ua npuas ncauj, thiab xyuas kom meej tias cov khoom xyaw nquag sib npaug thaum lub sijhawm ntxuav. Nws cov biocompatibility zoo thiab tsis muaj tshuaj lom ua kom nws yuav tsis ua rau khaus tawv nqaij thaum ntxuav khaub ncaws.
(2). Cov kua ntxuav tais diav
Hauv cov kua ntxuav tais diav, HPMC tsis yog tsuas yog pab txhim kho kev ua kua xwb, tab sis kuj ua rau lub zog ntawm cov ua npuas ncauj thiab txhim kho kev paub ntawm tus neeg siv. Tib lub sijhawm, nws tuaj yeem tiv thaiv kev sib sau ua ke thiab kev sib sau ua ke ntawm cov surfactants, ua kom cov khoom meej thiab pob tshab thaum lub sijhawm khaws cia.
(3). Cov khoom siv ntxuav kom zoo nkauj
HPMC feem ntau siv rau hauv cov khoom xws li tshuaj ntxuav ntsej muag thiab tshuaj da dej. Nws lub luag haujlwm tseem ceeb yog txhim kho cov qauv thiab cov kua ntawm cov khoom thaum muab cov nyhuv moisturizing. Vim tias HPMC nws tus kheej tsis muaj tshuaj lom thiab tsis muaj tshuaj lom, nws yuav tsis ua rau khaus tawv nqaij thiab tsim nyog rau kev siv hauv cov khoom ntxuav rau ntau hom tawv nqaij.
(4). Cov neeg ntxuav kev lag luam
Ntawm cov tshuaj ntxuav hauv kev lag luam, HPMC qhov kev ruaj khov thiab qhov ua kom tuab ua rau nws tsim nyog rau cov chaw ua haujlwm hnyav. Piv txwv li, hauv cov tshuaj ntxuav hlau, nws tswj kev faib tawm ntawm cov khoom xyaw nquag thiab tiv thaiv kev faib ua pawg thaum khaws cia.
4. Cov yam ntxwv cuam tshuam rau kev ruaj khov ntawm cov tshuaj ntxuav tes tau txhim kho los ntawm HPMC
Txawm hais tias HPMC qhia tau tias muaj kev txhim kho zoo heev hauv cov tshuaj ntxuav tes, nws cov nyhuv yuav raug cuam tshuam los ntawm qee yam:
Kev Ntsuas: Qhov ntau ntawm HPMC cuam tshuam ncaj qha rau qhov ruaj khov thiab kev ntws ntawm cov tshuaj ntxuav tes. Qhov kev ntsuas siab dhau yuav ua rau cov tshuaj ntxuav tes khov dhau, cuam tshuam rau kev paub ntawm tus neeg siv; thaum qhov kev ntsuas qis dhau yuav tsis ua rau nws cov txiaj ntsig ruaj khov tag nrho.
Kub: Qhov cuam tshuam ntawm HPMC yog cuam tshuam los ntawm kub, thiab nws cov viscosity yuav txo qis ntawm qhov kub siab dua. Yog li ntawd, thaum siv rau hauv qhov chaw kub siab, cov mis yuav tsum tau kho kom tswj tau qhov viscosity tsim nyog.
Tus nqi pH: Txawm hais tias HPMC muaj kev ruaj khov zoo hauv ntau qhov pH, cov kua qaub thiab alkali ntau heev tseem yuav cuam tshuam rau nws cov kev ua tau zoo, tshwj xeeb tshaj yog nyob rau hauv cov mis alkaline heev, los ntawm kev kho qhov sib piv lossis ntxiv lwm yam khoom ntxiv los txhim kho kev ruaj khov.
Kev sib raug zoo nrog lwm cov khoom xyaw: HPMC yuav tsum muaj kev sib raug zoo nrog lwm cov khoom xyaw hauv cov tshuaj ntxuav tes, xws li surfactants, tshuaj tsw qab, thiab lwm yam, kom tsis txhob muaj kev tsis haum tshuaj lossis nag lossis daus. Feem ntau thaum tsim daim ntawv qhia zaub mov, kev sim ua kom ntxaws yog qhov yuav tsum tau ua kom ntseeg tau tias muaj kev sib koom ua ke ntawm txhua yam khoom xyaw.
Kev siv HPMC hauv cov tshuaj ntxuav tes muaj qhov cuam tshuam loj heev rau kev txhim kho kev ruaj khov ntawm cov khoom. Nws tsis yog tsuas yog tiv thaiv kev sib cais ntawm cov tshuaj ntxuav tes thiab txhim kho kev ruaj khov ntawm cov ua npuas ncauj, tab sis kuj tseem txhim kho kev tiv thaiv khov-thaw thiab txhim kho kev ua kua. Tib lub sijhawm, HPMC txoj kev ruaj khov tshuaj lom neeg, kev mos mos thiab tsis muaj tshuaj lom ua rau nws haum rau ntau hom tshuaj ntxuav tes, suav nrog cov khoom siv hauv tsev, kev lag luam thiab kev saib xyuas tus kheej. Txawm li cas los xij, kev siv HPMC tseem yuav tsum tau ua kom zoo raws li cov qauv tshwj xeeb kom ntseeg tau tias muaj kev ua tau zoo tshaj plaws hauv ntau qhov chaw sib txawv.
Lub sijhawm tshaj tawm: Lub Kaum Hli-18-2024