Hydroxypropyl Methylcellulose (HPMC) yog ib qho khoom siv polymer uas siv dav hauv kev lag luam tshuaj, zaub mov, tshuaj pleev ib ce thiab kev tsim kho kev lag luam. Nws muaj cov thickening zoo heev, film-forming, stabilizing thiab lubricating zog thiab plays lub luag hauj lwm tseem ceeb nyob rau hauv ntau yam khoom formulations. Lub viscosity ntawm HPMC yog ib qho ntawm nws cov khoom tseem ceeb thiab muaj feem cuam tshuam rau cov khoom lag luam thiab kev siv.
1. Thickening nyhuv
Lub viscosity ntawm HPMC feem ntau yog txiav txim siab los ntawm nws qhov hnyav molecular thiab qib ntawm kev hloov pauv (hom thiab qib ntawm cov khoom hloov). High viscosity HPMC tuaj yeem ua kom cov viscosity ntawm cov kev daws teeb meem, yog li ua lub luag haujlwm thickening hauv ntau cov qauv. Piv txwv li, hauv kev lag luam khoom noj khoom haus, HPMC feem ntau yog siv los ua cov thickener hauv cov khoom noj siv mis, dej haus, kua ntses thiab cov khoom ci los txhim kho saj thiab ruaj khov ntawm cov khoom. HPMC nrog viscosity siab dua tuaj yeem tiv thaiv cov kua stratification thiab txhim kho cov khoom sib xws.
2. Tswj kev tso tawm
Hauv kev lag luam kws tshuaj, HPMC feem ntau yog siv los tswj cov tshuaj tsim tawm. High-viscosity HPMC tuaj yeem tsim cov viscosity gel hauv dej, uas maj mam yaj hauv lub cev thiab maj mam tso cov tshuaj, pab kom ua tiav cov tshuaj tso tawm ntev. Piv txwv li, hauv cov ntsiav tshuaj txuas ntxiv thiab cov tshuaj ntsiav, qhov viscosity ntawm HPMC muaj kev cuam tshuam ncaj qha rau tus nqi ntawm cov tshuaj tso tawm. Xaiv HPMC nrog cov viscosity tsim nyog tuaj yeem kho cov tshuaj tso tawm profile raws li qhov xav tau, txhim kho kev kho mob thiab txo cov kev mob tshwm sim.
3. Zaj duab xis-forming zog
HPMC muaj cov khoom ua yeeb yaj kiab zoo heev, uas yog qhov tseem ceeb tshwj xeeb hauv ntau daim ntawv thov. High-viscosity HPMC tuaj yeem tsim cov yeeb yaj kiab uas muaj zog thiab tsis sib xws thiab feem ntau yog siv los ua cov khoom siv txheej rau cov tshuaj ntsiav tshuaj los tiv thaiv cov khoom xyaw tshuaj los ntawm cov teebmeem ntawm lub teeb, noo noo thiab oxygen thiab txuas ntxiv lub txee lub neej ntawm cov khoom. Tsis tas li ntawd, nyob rau hauv cov tshuaj pleev ib ce, high-viscosity HPMC yuav siv tau nyob rau hauv cov khoom xws li lub ntsej muag lub ntsej muag, gels thiab tshuaj pleev ib ce los muab kev pab zoo thiab moisturizing los.
4. Kev ruaj ntseg
HPMC muaj kev ruaj ntseg zoo thiab thermal stability hauv cov kua dej. High viscosity HPMC tuaj yeem txhim kho lub cev ruaj khov ntawm cov khoom thiab tiv thaiv kev sib haum xeeb thiab stratification. Hauv emulsions, suspensions thiab colloidal kev daws teeb meem, cov nyhuv thickening ntawm HPMC tuaj yeem txhim kho kev ruaj ntseg ntawm lub cev thiab xyuas kom meej tias cov khoom tseem tsis sib xws thaum khaws cia thiab siv.
5. Lubricity
High viscosity HPMC muaj lubricity zoo, uas tseem ceeb heev nyob rau hauv ntau daim ntawv thov kev lag luam. Piv txwv li, hauv kev lag luam khoom siv hauv tsev, HPMC feem ntau siv hauv cov cement mortar thiab gypsum cov khoom ua cov roj nplua nyeem thiab cov thickener los txhim kho kev tsim kho kev ua haujlwm thiab cov khoom siv dag zog ntawm cov khoom. Tsis tas li ntawd, hauv kev ua zaub mov, siab viscosity HPMC tuaj yeem txhim kho qhov extensibility thiab viscoelasticity ntawm mov paj thiab txhim kho cov saj thiab kev ntxhib los mos ntawm cov khoom noj.
6. Kev xaiv viscosity
Hauv kev siv tswv yim, nws yog ib qho tseem ceeb uas yuav tau xaiv HPMC nrog cov viscosity tsim nyog. Lub viscosity uas siab dhau yuav ua rau kev daws teeb meem nyuaj thiab ua haujlwm, thaum lub viscosity tsawg dhau yuav tsis muab cov nyhuv thickening txaus thiab ruaj khov. Yog li ntawd, nyob rau hauv cov khoom tsim qauv, nws yog feem ntau yuav tsum tau xaiv HPMC uas tsim nyog viscosity raws li tej daim ntawv thov yuav tsum tau, thiab optimize cov mis los ntawm kev sim kom ua tau zoo tshaj plaws.
Lub viscosity ntawm HPMC muaj qhov cuam tshuam loj rau nws txoj haujlwm thiab kev ua haujlwm hauv ntau yam khoom tsim. Los ntawm kev xaiv thiab kho cov viscosity ntawm HPMC, ntau lub zog xws li thickening, tswj kev tso tawm, tsim zaj duab xis, stabilization thiab lubrication ntawm cov khoom tuaj yeem ua tiav kom tau raws li cov kev xav tau ntawm kev lag luam sib txawv thiab kev siv. Hauv kev siv tswv yim, kev nkag siab tob txog cov yam ntxwv viscosity ntawm HPMC thiab kev xaiv tsim nyog thiab kev ua kom zoo raws li cov qauv tsim nyog yuav pab txhim kho cov khoom zoo thiab kev sib tw.
Post lub sij hawm: Aug-12-2024