HydroxyPropyyl methylcellulose (HPMC)yog lub cellulose derivative dav siv hauv cov tshuaj, khoom noj khoom haus thiab kev tsim khoom lag luam. Nws cov qauv tshuaj muaj cov pab pawg hydroxypropyl thiab nws cov haujlwm tseem ceeb yog ua ib qho kev ua kom tuab, thiab lwm yam "yog sawv cev rau cov sib txawv thiab cov khoom.
1. Lub ntsiab lus ntawm HPMC thiab HPMCs
Lub ntsiab sib txawv ntawm HPMC thiab HPMCs yog tias "cov" Sulfate "pab pawg, HPMC cov txiv neej yuav ntxiv cov pab pawg sulfate kom lawv cov haujlwm tshwj xeeb.
HPMC: Qhov no yog qauv hydroxypropyl methylcellulose, uas tsis muaj cov pab pawg sulfate. Nws yog ib qho muaj nyob rau hauv cov zaub mov, tshuaj, tshuaj pleev ib cheeb tsam, tsim kho thiab lwm thaj chaw, thiab muaj cov khoom yooj yim xws li thickening, zaj duab xis tsim, thiab kev sib cais, thiab dispersion. HPMC yog kev sib xyaw ua ke ntawm hydroxypropyl thiab methyl pawg, thiab nws viscility, solubility, solubility thiab rhuaury tuaj yeem tswj hwm los ntawm kev hloov kho ntau qib ntawm ethermov.
HPMCS: HPMCS yog HydroxyPropyyl methylcelulose sulfate muaj cov sulfate pawg. Tus "S" sawv cev cov txheej txheem sulfation, uas feem ntau ua rau cov tshuaj hydrophilic, thiab qhov ruaj khov thiab viscosity nyob rau hauv kev daws teeb meem yuav txawv. HPMC feem ntau yog siv nyob rau hauv cov xwm txheej uas yuav tsum muaj cov tshuaj muaj kev ruaj khov zoo thiab cov tshuaj lom neeg xws li cov chaw muag tshuaj.
2. Tshuaj Ntsuam Xyuas Kev Sib Txawv
Tus qauv tshuaj ntawm HPMC feem ntau yog raws ntawm cellulose, uas tau hloov kho los ntawm methylation thiab hydroxyprodation. Nws cov qauv muaj cov dej ua kom tiav cov dej solubility thiab tuaj yeem tsim cov tshuaj colloidal hauv dej.
Cov qauv tshuaj kho mob ntawm HPMC nrog kev qhia ntawm cov pab pawg sulfate, uas hloov pauv nws cov kev ua haujlwm hauv hydrophilicity thiab kev ua haujlwm nyob rau hauv qee cov dej-soluble daws teeb meem. Cov kev qhia ntawm cov pab pawg sulfate pab kom nws cov hydration thiab tuaj yeem cuam tshuam nws cov kev cais tawm lossis cov khoom sib txawv raws qee yam kev mob.
3. Kev ua tau zoo sib txawv
Solubility: HPMC feem ntau yaj nyob rau hauv dej los ua kev daws teeb meem thiab muaj cov viscosity zoo. Nws solubility thiab viscosity tuaj yeem hloov kho raws li xav tau, xws li tswj tau nws affinity nrog dej thiab cov cheeb tsam rheological nthuav dav hauv cov kev daws teeb meem sib txawv.
Stability: HPMCS tau nce hydrophilicity vim yog cov kev taw qhia ntawm cov pab pawg sulfate, uas yuav muab cov khoom ruaj khov zoo hauv cov khoom siv tshuaj lossis pleev xim rau cov tshuaj pleev. Ib qho ntxiv, pawg sulfate kuj tseem tuaj yeem ua rau Kimacell® ruaj khov nyob rau qee qhov xwm txheej, xws li cov av noo lossis hloov PH muaj qhov chaw HPMC yuav qhia tau qhov muaj zog kom muaj zog.
Biocompatibility: raws li ib tus neeg siv dav siv tshuaj ntsuam kws tshuaj zoo, HPMC tau ua tiav tag nrho rau nws biocompatibility thiab kev nyab xeeb hauv lub chaw tshuaj. Txawm li cas los xij, vim qhov sib ntxiv ntawm cov pab pawg sulfate, HPMCs yuav xav tau kev kawm ntxiv rau kev haus luam yeeb ntxiv hauv qee qhov kev siv rhiab.
4. Daim ntawv thov teb
HPMC: Siv tshuaj rau hauv cov tshuaj (xws li kev tso tawm cov tshuaj-tso tawm, cov ntsiav tshuaj ntsiav tshuaj), tshuaj pleev ib ce, khoom noj thiab lwm yam lag luam. Nws cov tsis muaj txiaj ntsig, hypoochlergenicity thiab cov biocompatibility ua nws ib hom thickener, zaj duab xis yav tas los thiab stabernilizer hauv cov khoom lag luam thiab kev lag luam.
HPMCS: Vim nws cov tshuaj tshwj xeeb thiab cov yam ntxwv tshwj xeeb thiab cov yam ntxwv HPMC yog feem ntau siv hauv qee qhov kev siv cov tshuaj uas muaj kev tawm ntawm cov tshuaj. HPMC feem ntau yog siv cov tshuaj tiv thaiv tshuaj-tso tawm thiab cov khoom siv tshuaj tshwj xeeb, thiab qee zaum siv hauv cov khoom noj ntxiv.
5. Cov Khoom Siv Khoom Tshwj Xeeb
HPMC thiab HPMC thiab HPMC ntau muaj ntau yam ntawm cov khoom lag luam cov khoom lag luam, uas feem ntau tau faib raws li cov tsis haum xws li lub cev hnyav dua li molecular hnyav, qib kaum, thiab solubility. Cov khoom lag luam ntawm cov sib txawv sib txawv yuav qhia tau cov kev ua tau sib txawv hauv cov ntawv thov sib txawv.
HPMC muaj cov qib sib txawv ntawm etherification ntawm cov vascosities thiab solubility sib txawv, thiab haum rau txawv teb. Cov kev qhia tshwj xeeb muaj xws li viscosity qis, nruab nrab viscosity, siab viscosity, thiab lwm yam.
Cov kev qhia tshwj xeeb ntawm HPMC feem ntau yog faib raws li cov tsis xws li qib sulfation, solubility thiab hydrophilicity. HPMCs ntawm cov kev sib txawv tuaj yeem hloov kho raws li cov kev xav tau sib txawv.
HPMC thiab HPMC muaj qhov sib txawv tseem ceeb hauv cov qauv tshuaj, kev ua tau zoo thiab cov chaw thov. HPMC yog cov pa hydroxypropyl methylcellose, uas tau siv dav hauv ntau thaj teb; Thaum HPMCs yog ib qho sulfated kimacell®hpmc, uas tau muaj kev ua haujlwm ntau dua hauv cov kws tshaj lij, thiab xws li kev tso tshuaj yeeb zoo.
Hauv kev siv tiag tiag, kev xaiv ntawmHPMCLossis HPMC yuav tsum txiav txim siab raws li cov kev xav tau thiab kev siv. Yog tias muaj cov cai tshwj xeeb rau solubility, ruaj khov, thiab lwm yam, HPMC yuav tau muab ua ntej. Yog tias tsis muaj cov kev xav tau tshwj xeeb rau cov nqi thiab kev ua tau zoo, HPMC yog kev xaiv ntau dua thiab kev xaiv nyiaj txiag.
Lub Sijhawm Post: Jan-27-2025