Hydroxypropyl methylcellulose (HPMC) yog ib qho tseem ceeb ntawm cov dej-soluble nonionic cellulose ether nrog zoo thickening, gelling, bonding, film-forming, lubricating, emulsifying thiab suspending functions, yog li nws yog dav siv nyob rau hauv lub tsev cov ntaub ntawv, tshuaj, khoom noj khoom haus, tshuaj pleev ib ce thiab lwm yam teb. .
Thickening mechanism ntawm hydroxypropyl methylcellulose
Cov nyhuv thickening ntawm HPMC feem ntau yog los ntawm nws cov qauv molecular. HPMC molecular saw muaj hydroxyl thiab methyl pawg, uas tuaj yeem tsim hydrogen bonds nrog dej molecules, yog li txwv tsis pub txav ntawm cov dej molecules thiab ua kom cov viscosity ntawm cov tshuaj. Thaum HPMC yaj hauv dej, nws cov saw hlau molecular nthuav tawm hauv dej thiab cuam tshuam nrog cov dej molecules los tsim cov qauv sib txuas, yog li ua kom cov viscosity ntawm cov tshuaj. Lub peev xwm thickening ntawm HPMC kuj cuam tshuam los ntawm cov yam xws li nws qhov kev hloov pauv, qhov hnyav molecular thiab concentration.
Kev siv hydroxypropyl methylcellulose hauv cov khoom siv hauv tsev
Hauv cov khoom siv hauv tsev, HPMC feem ntau yog siv rau hauv cov khoom xws li cov cement mortar, gypsum-raws li cov ntaub ntawv thiab coatings ua cov thickener thiab dej retainer. Nws cov nyhuv thickening tuaj yeem txhim kho kev tsim kho ntawm cov khoom siv thiab txhim kho nws cov kev ua haujlwm los tiv thaiv sagging, yog li ua rau cov txheej txheem tsim kho smoother. Piv txwv li, hauv cov cement mortar, qhov sib ntxiv ntawm HPMC tuaj yeem ua kom cov viscosity ntawm cov mortar thiab tiv thaiv cov mortar los ntawm sagging thaum nws yog tsim los ntawm ib tug ntsug nto. Nws tseem tuaj yeem txhim kho cov dej tuav ntawm lub mortar thiab tiv thaiv cov mortar kom qhuav sai heev, yog li txhim kho lub zog thiab durability ntawm mortar.
Kev siv Hydroxypropyl Methylcellulose hauv Pharmaceutical Field
Hauv kev lag luam tshuaj, HPMC tau siv dav hauv cov ntsiav tshuaj, tshuaj ntsiav, gels, tshuaj kho qhov muag thiab lwm yam tshuaj ua cov thickener, zaj duab xis qub thiab nplaum. Nws cov nyhuv thickening zoo tuaj yeem txhim kho cov khoom rheological ntawm cov tshuaj thiab txhim kho kev ruaj ntseg thiab bioavailability ntawm cov tshuaj. Piv txwv li, nyob rau hauv kev npaj ophthalmic, HPMC tuaj yeem siv los ua cov roj nplua nyeem thiab cov thickener, thiab nws cov nyhuv thickening zoo tuaj yeem ua rau lub sijhawm nyob ntawm cov tshuaj nyob rau ntawm lub qhov muag, yog li txhim kho cov txiaj ntsig ntawm cov tshuaj.
Kev siv Hydroxypropyl Methylcellulose hauv Khoom Noj
Hauv kev lag luam khoom noj khoom haus, HPMC feem ntau siv rau hauv cov khoom noj xws li cov khoom siv mis nyuj, jelly, dej haus thiab cov khoom ci ua cov thickener, emulsifier thiab stabilizer. Nws cov nyhuv thickening tuaj yeem txhim kho qhov saj thiab kev ntxhib los mos ntawm cov khoom noj, thiab ua kom cov viscosity thiab stability ntawm cov zaub mov. Piv txwv li, hauv cov khoom siv mis nyuj, HPMC tuaj yeem ua kom cov viscosity ntawm cov khoom thiab tiv thaiv whey nag lossis daus, yog li txhim kho cov saj thiab ruaj khov ntawm cov khoom.
Kev siv Hydroxypropyl Methylcellulose hauv Tshuaj pleev ib ce
Hauv kev lag luam tshuaj pleev ib ce, HPMC tau siv dav hauv cov khoom lag luam xws li tshuaj pleev, tshuaj pleev, tshuaj zawv plaub hau thiab cov tshuaj pleev ib ce ua cov thickener, emulsifier thiab stabilizer. Nws cov nyhuv thickening tuaj yeem txhim kho kev ntxhib los mos thiab ruaj khov ntawm cov tshuaj pleev ib ce, thiab txhim kho kev siv cov nyhuv thiab cov neeg siv khoom ntawm cov khoom. Piv txwv li, nyob rau hauv cov tshuaj pleev ib ce thiab tshuaj pleev ib ce, qhov sib ntxiv ntawm HPMC tuaj yeem ua rau kom cov viscosity ntawm cov khoom, ua kom yooj yim rau kev thov thiab nqus, thaum tseem txhim kho cov nyhuv moisturizing ntawm cov khoom.
Hydroxypropyl Methylcellulose tau siv dav hauv cov khoom siv hauv tsev, tshuaj, khoom noj khoom haus thiab tshuaj pleev ib ce vim nws cov khoom thickening zoo heev. Nws cov txheej txheem thickening yog tsuas yog ua kom cov viscosity ntawm cov tshuaj los ntawm kev tsim hydrogen bonds nrog dej molecules, txwv tsis pub txav ntawm cov dej molecules. Cov teb sib txawv muaj cov ntawv thov sib txawv rau HPMC, tab sis nws txoj haujlwm tseem ceeb yog los txhim kho cov viscosity thiab ruaj khov ntawm cov khoom. Nrog rau kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev txhim kho txuas ntxiv ntawm kev siv thev naus laus zis, daim ntawv thov kev cia siab ntawm HPMC yuav dav dua.
Post lub sij hawm: Lub Xya hli ntuj-31-2024