1. Pib
HydroxyPropyyl methylcellueculose (HPMC) yog ib qho hluavtaws tseem ceeb siv hauv cov khoom siv hauv tsev, chaw npaj khoom siv, tshuaj ntxiv, khoom noj ntxiv thiab tshuaj pleev ib ce. Nws cov dej zoo khaws cia yog ib qho ntawm cov yam ntxwv tseem ceeb ntawm HPMC cov ntawv thov dav.
2. Cov qauv thiab cov khoom ntawm HPMC
2.1 Cov Qauv Tshuaj
HPMC yog cov khoom siv hluavtule sandi-hluavtaws ether. Lub hydroxypropyl thiab methyl chaw nyob rau hauv cov qauv tshuaj muab nws cov cim solubility thiab colloidal cov khoom. Cov qauv yooj yim ntawm HPMC muaj β-d-kua roj ntawm cov pawg cellulose, nyob rau qee pawg hydroxyl tau hloov los ntawm methyl thiab hydroxypropropyl pawg. Txoj hauj lwm thiab qib degree hloov chaw ntawm cov chaw nyob ncaj qha cuam tshuam rau solubility, viscosity thiab dej khaws cia ntawm HPMC.
2.2 Cov Khoom Siv Lub Cev
Dej solubility: HPMC yog yooj yim soluble hauv dej txias thiab ua cov tshuaj colloidal hauv dej kub.
Cov cuab yeej thickening: nws tuaj yeem tsim cov tshuaj tua kab hauv dej thiab muaj cov nyhuv zoo.
Zaj duab xis-ua cov cuab yeej: nws tuaj yeem tsim lub pob tshab thiab kev ua yeeb yaj kiab ywj.
Kev Ncua Ntawv: Nws muaj kev tshem tawm cov kev kawm zoo nyob rau hauv kev daws teeb meem thiab tuaj yeem tsim cov teeb meem tsis txaus ntseeg.
3. Dej khaws cia ntawm HPMC
3.1 Kev Ua Haujlwm Rau Dej
Cov dej khaws cia ntawm HPMC yog feem ntau yog ntaus nqi rau cov kev sib cuam tshuam ntawm pawg ntawm hydroxyl thiab hloov chaw ntawm cov qauv molecules. Tshwj xeeb, HPMC khaws dej los ntawm cov txheej txheem hauv qab no:
Hydrogen Kev Ua Haujlwm: Cov pab pawg hydroxyl hauv HPMC lwg me me ua cov ntawv hydrogen nrog cov lwg dej. Lub zog no ua rau cov molecules yuav khov kho ib puag ncig HPMC, txo cov dej evaporation.
Cov viscosity siab: Kev daws siab viscosity tsim los ntawm HPMC hauv dej tuaj yeem cuam tshuam rau kev txav ntawm dej, yog li txo dej poob.
Cov qauv network: Tus qauv network tsim los ntawm HPMC hauv dej tuaj yeem ntes thiab khaws dej cov dej me me.
Cov nyhuv colloid: lub colloid tsim los ntawm HPMC tuaj yeem kaw dej hauv qhov colloid thiab nce cov dej khaws cia lub sijhawm.
3.2 Cov ntsiab lus cuam tshuam rau cov dej ua ke
Qib ntawm hloov chaw: Cov dej tuav tseg ntawm HPMC cuam tshuam los ntawm qib degree (DS). Qhov siab dua qib ntawm kev hloov pauv, lub zog ntawm hydrophilicity ntawm HOLMC thiab qhov zoo dua nws cov dej khaws cia.
Molecular Qhov hnyav: Qhov hnyav siab dua yuav pab tau cov saw molecular muaj zog, li kev txhim kho dej rov qab.
Cov kev xav: Cov concentration ntawm HPMC kev daws teeb meem muaj qhov cuam tshuam tseem ceeb ntawm cov dej khaws cia. Cov kev daws teeb meem siab muaj peev xwm ua cov kev daws teeb meem ntau dua thiab muaj cov qauv network ntau ruaj khov, yog li khaws dej ntau dua.
Qhov kub thiab txias: dej khaws cia ntawm HPMC sib txawv nrog kub. Thaum qhov kub nce, lub piscos txog ntawm HPMC txo qis, ua rau muaj kev txo qis hauv cov dej khaws cia.
4. Daim ntawv thov ntawm HPMC hauv cov teb sib txawv
4.1 Cov Ntaub Ntawv Hauv Tsev
Hauv cov ntaub ntawv hauv tsev, HPMC yog siv los ua dej tuav cia rau cov khoom noj thiab cov khoom lag luam gypsum. Nws lub ntsiab ua haujlwm suav nrog:
Txhim kho kev tsim kho kev tsim kho: los ntawm kev tsim kho cov dej noo, qhib lub sij hawm ntawm xis mas thiab Gypsum yog txuas ntxiv, ua cov txheej txheem kev tsim kho.
Txo cov kab nrib pleb: kev tuav kom zoo yuav pab txo cov kab nrib pleb uas tsim cov teeb meem kom qhuav thiab txhim kho lub zog thiab cov khoom siv tsawg.
Txhim kho txoj hlua khi nyiaj: nyob rau hauv cov nplais nplaum, HPMC tuaj yeem ua kom muaj zog ntxiv thiab txhim kho txoj kev sib raug zoo.
4.3 Pharmopleutical
Hauv kev npaj tshuaj, cov dej tuav tseg ntawm HPMC plays Lub luag haujlwm tseem ceeb hauv kev tso tawm thiab kev ruaj khov ntawm cov yeeb tshuaj:
Kev So kom txaus-tso tawm: HPMC tuaj yeem siv ua cov ntawv tso tawm cov tshuaj kom ua tiav cov tshuaj tso tawm los ntawm kev tswj cov dej sib txawv.
Thickeners thiab Kev Siv: Hauv cov tshuaj thiab cov ntsiav tshuaj, HPMC ua raws li cov tuab thiab muaj cov tshuaj muaj zog thiab muaj zog.
4.3 Cov Khoom Noj Ntxiv
Hauv kev lag luam khoom noj khoom haus, HPMC ua raws li cov tuab thiab muaj stabilizer thiab cov dej tuav cia yog siv rau:
Txhim kho Sajlaj: Los ntawm cov dej khaws cia, HPMC tuaj yeem txhim kho kev ntxhib los mos thiab saj ntawm cov khoom noj, ua rau nws ntau lubricated thiab qab.
Kev sib zog ua lub neej: Los ntawm kev khaws cov dej, HPMC tuaj yeem tiv thaiv cov dej poob thaum lub sijhawm cia, yog li txuas lub txee lub neej.
4.4 Tshuaj pleev ib ce
Hauv cov tshuaj pleev ib ce, dej khaws cia ntawm HPMC yog siv rau:
Cov nyhuv noo: raws li lub moisturizer, HPMC tuaj yeem pab ntsuas kom noo ntawm cov tawv nqaij thiab muab cov nyhuv ntev ntev.
Kev tshem tawm kom raug: Hauv emulsions thiab raug tshem tawm, HPMC stabilizes cov khoom lag luam thiab tiv thaiv stratification thiab pedimentation.
Cov dej tuav tseg ntawm HPMC ua rau nws ua haujlwm tseem ceeb hauv ntau thaj teb. Nws khaws dej thiab txo cov dej evaporation los ntawm hydrogen tsev, siab viscosity los xij, qauv network thiab colloid cuam tshuam. Dej khaws cia yog cuam tshuam los ntawm cov qib hloov chaw, hnyav thiab ntsuas kub, uas txiav txim siab cov kev ua tau zoo ntawm HPMC hauv ib daim ntawv thov tshwj xeeb. Txawm hais tias nyob rau hauv lub tsev cov ntaub ntawv, chaw npaj khoom, khoom noj khoom haus, dej khaws tseg ntawm HPMC ua haujlwm tseem ceeb hauv kev txhim kho qhov zoo thiab ua haujlwm ntawm cov khoom.
Lub Sijhawm Post: Jun-26-2024