qhia:
Hydroxypropylmethylcellulose (HPMC) yog cov khoom siv ntau yam siv dav hauv ntau qhov kev lag luam vim nws cov khoom muaj txiaj ntsig ntau.Nws yog ib qho derivative ntawm cellulose, tau los ntawm kev hloov kho cellulose nrog propylene oxide thiab methyl chloride.HPMC tau siv dav hauv kev lag luam tshuaj, zaub mov, kev tsim kho thiab tshuaj pleev ib ce vim nws cov dej tuav tau zoo heev.Daim ntawv no muab kev tshuaj xyuas qhov tob ntawm kev khaws dej ntawm HPMC.
Kev tuav dej ntawm HPMC:
Cov dej tuav cov khoom ntawm HPMC yog ib qho ntawm cov laj thawj tseem ceeb tshaj plaws rau nws txoj kev siv dav hauv ntau qhov kev lag luam.HPMC muaj peev xwm tuav tau dej siab vim nws qhov dej hydrophilic.Nws absorbs dej thiab swells mus rau ob peb zaug nws qhov loj me, ua rau nws cov dej tuav zoo heev.Cov dej tuav cov khoom ntawm HPMC nyob ntawm ntau yam xws li qib kev hloov pauv, viscosity ntawm HPMC cov tshuaj, thiab hom hnyav siv.
Degree ntawm kev hloov:
Qib ntawm kev hloov pauv (DS) ntawm HPMC yog qhov tseem ceeb cuam tshuam rau nws txoj kev tuav dej.DS ntawm HPMC yog hais txog tus naj npawb ntawm pawg hydroxyl hloov los ntawm hydroxypropyl thiab methyl pawg hauv cellulose molecule.HPMC nrog qib siab dua ntawm kev hloov pauv muaj peev xwm khaws dej ntau dua li HPMC nrog qib qis ntawm kev hloov pauv.Qhov siab dua DS ntawm HPMC nce hydrophilicity ntawm cov molecule, ua rau cov dej tuav tau zoo dua.
Viscosity ntawm HPMC tov:
Lub viscosity ntawm HPMC cov tshuaj yog lwm yam uas cuam tshuam rau kev tuav dej ntawm HPMC.Lub viscosity ntawm HPMC cov tshuaj nce nrog qhov nce ntawm HPMC concentration hauv cov kuab tshuaj.Vim tias muaj ntau dua HPMC molecules nyob rau hauv cov kuab tshuaj, qhov siab dua qhov viscosity ntawm HPMC cov tshuaj, qhov zoo dua cov dej tuav.High viscosity HPMC cov kev daws teeb meem tsim cov qauv zoo li gel uas cuam tshuam cov dej molecules thiab tiv thaiv lawv ntawm evaporating.
Khoom siv Solvent:
Hom kuab tshuaj siv los npaj cov tshuaj HPMC kuj tuaj yeem cuam tshuam rau nws cov khoom tuav dej.HPMC yog soluble hauv dej thiab ntau yam organic solvents, xws li cawv, esters, thiab ketones.Cov kuab tshuaj siv los npaj cov tshuaj HPMC tuaj yeem cuam tshuam rau tus cwj pwm o ntawm cov molecule.HPMC swells ntau dua hauv dej thiab nqus dej ntau dua li HPMC hauv cov kuab tshuaj organic.Piv nrog rau cov organic solvent daws, HPMC muaj cov khoom tuav dej zoo dua hauv cov tshuaj aqueous.
Kev siv HPMC hauv ntau qhov kev lag luam:
Vim nws cov dej tuav tau zoo heev, HPMC tau siv dav hauv ntau lub lag luam xws li tshuaj, khoom noj, kev tsim kho thiab tshuaj pleev ib ce.
Pharmaceutical kev lag luam:
Hauv kev lag luam kws tshuaj, HPMC feem ntau yog siv los ua ib qho kev sib khi, disintegrant thiab coating agent.Nws yog siv los ua ib daim ntawv khi hauv cov ntsiav tshuaj npaj los tuav cov khoom xyaw ua ke.Raws li ib tug disintegrant, HPMC pab zom cov ntsiav tshuaj mus rau hauv me me hais nyob rau hauv lub plab, uas pab txoj kev nqus tshuaj.HPMC yog siv los ua txheej txheej los tiv thaiv cov tshuaj los ntawm ya raws thiab tswj cov tshuaj tso tawm.
kev lag luam zaub mov:
Hauv kev lag luam khoom noj khoom haus, HPMC yog siv los ua emulsifier, stabilizer thiab thickener.Nws yog siv los ua emulsify roj thiab dej-raws li kua, stabilize zaub mov, thiab thicken sauces thiab gravy.HPMC kuj tseem siv los ua cov khoom siv ntxiv rau cov khoom noj.
Kev tsim kho kev lag luam:
Hauv kev tsim kho kev lag luam, HPMC feem ntau yog siv hauv cov khoom siv cement xws li mortar thiab pob zeb.Nws yog siv los ua tus neeg saib xyuas dej los tiv thaiv cov evaporation ntawm cov dej hauv cov cement sib tov.HPMC tseem tuaj yeem txhim kho kev ua haujlwm ntawm cov cement sib tov thiab txo qhov tawg ntawm cov khoom.
Kev lag luam tshuaj pleev ib ce:
Hauv kev lag luam tshuaj pleev ib ce, HPMC yog siv los ua thickener, emulsifier thiab txias tus neeg sawv cev.Nws yog siv los ua cov tshuaj pleev xim thiab cov nplaum nplaum, emulsify cov roj thiab cov khoom xyaw hauv dej, thiab kho cov plaub hau.
nyob rau hauv xaus:
Hauv kev xaus, cov khoom tuav dej ntawm HPMC yog ib qho ntawm nws cov khoom tseem ceeb tshaj plaws thiab muaj txiaj ntsig zoo.HPMC muaj lub peev xwm khaws dej siab vim nws qhov dej hydrophilic, ua kom nws nqus tau thiab khaws dej thiab tiv thaiv nws los ntawm evaporating.Qib ntawm kev hloov pauv, kev daws viscosity thiab hom kuab tshuaj siv yog qhov tseem ceeb cuam tshuam rau kev tuav dej ntawm HPMC.HPMC yog dav siv nyob rau hauv ntau yam lag luam xws li tshuaj, khoom noj khoom haus, kev tsim kho thiab tshuaj pleev ib ce vim nws zoo heev dej tuav cov khoom.
Post lub sij hawm: Lub Xya hli ntuj-19-2023