HydroxyPropyyl methylulose, feem ntau yog hu ua HPMC, yog lub cellulose dav siv nyob rau hauv ntau yam kev lag luam, thiab lwm yam ntawm HPMC yog nws lub peev xwm los khaws dej. HPMC tuaj yeem nqus thiab khaws cov dej ntau dua, muab cov thicking zoo heev, kev ua kom muaj zog rau ntau yam khoom. Txawm li cas los xij, lub peev txheej hauv dej khaws cia ntawm HPMC muaj feem xyuam rau ntau yam, suav nrog kub.
Qhov kub yog ib qho tseem ceeb cuam tshuam rau cov dej tuav tseg ntawm HPMC. Lub solubility thiab viscosity ntawm HPMC yog nyob ntawm. Feem ntau, HPMC yog ntau soluble thiab voscous ntawm ntau dua qhov kub. Raws li qhov ntsuas kub nce ntxiv, cov molecular chains ntawm HPMC ua ntau lub Txawb, thiab Dej lwg ntau ntxiv los cuam tshuam nrog Hydrophilic Chaw ntawm Hydmc, ua rau muaj ntau cov dej cia. Ntawm qhov tsis sib xws, ntawm qis dua qhov kub, cov molecular chains ntawm HPMC muaj kev nyuaj dua, thiab nws yog qhov nyuaj rau cov lwg me me los nkag rau hauv HPMC matrix, ua rau muaj dej tsawg dua.
Qhov kub kuj cuam tshuam rau cov kinetics dej diffusion hauv HPMCS. Vim yog qhov nce toj ntawm HPMC cov saw, nqus dej thiab dej nqus dej hauv HPMC muaj siab dua ntawm kev kub siab dua. Ntawm qhov tod tes, dej tso tawm ntawm HPMC sai dua vim tias cov cua sov ntau ntxiv rau lawv kom lawv khiav tawm ntawm HPMC matrix. Yog li no, ntsuas kub muaj qhov cuam tshuam tseem ceeb rau cov dej nqus thiab tso tawm cov khoom HPMC.
Cov dej khaws cia ntawm HPMC ntawm ntau qhov kub muaj ntau cov kev ua haujlwm cuam tshuam. Hauv kev lag luam hauv kws tshuaj, HPMC tau siv dav ua ib phau ntawv qhia, tsis sib haum xeeb, thiab tso-tswj cov tshuaj ntsiav hauv cov ntsiav tshuaj. Cov dej tuav tseg ntawm HPMC yog qhov tseem ceeb los ua kom ntseeg tau tias muaj kev sib xws thiab kev ua kom zoo tshaj plaws Los ntawm kev nkag siab cov nyhuv ntawm HPMC dej khaws cia, cov qauv siv ntsiav tshuaj tuaj yeem tsim cov ntsiav tshuaj uas muaj peev xwm tiv thaiv sib txawv thiab cov xwm txheej xa khoom. Piv txwv li, yog tias cov ntsiav tshuaj tau khaws cia lossis thauj hauv cov kev mob siab, hpmc nrog cov dej siab dua tuaj yeem raug xaiv los txo cov kev ruaj khov thiab ua tau zoo ntawm cov ntsiav tshuaj.
Hauv kev lag luam khoom noj khoom haus, HPMC yog siv los ua emulsifier, thickener thiab stabilizer nyob rau ntau cov khoom xws li cov kua qaub, kua zaub thiab khoom qab zib. Cov khoom siv dej ceev ceev ntawm HPMC tuaj yeem cuam tshuam cov qauv, viscosity thiab kev ruaj khov ntawm cov khoom noj khoom noj. Piv txwv li, HPMC nrog dej ntau dua tuaj yeem muab cov mis nyuj khov nrog cov ntaub ntawv cuav thaum tswj hwm nws qhov chaw ruaj khov thaum lub sijhawm sib txawv. Ib yam li ntawd, hauv cov tshuaj pleev ib yam, HPMC yog siv los ua cov tuab, binder thiab emulsion stabilizer. Cov dej khaws cia ntawm HPMC tuaj yeem cuam tshuam qhov cuam tshuam ntau ntxiv rau kev sib xws, sib kis thiab txee rau cov khoom siv kom pleev xim. Yog li ntawd, cov qauv yuav tsum xav txog qhov cuam tshuam ntawm cov khoom siv tsis tau ntawm HPMC kom ntseeg tau tias kev ua tau zoo thiab zoo ntawm cov khoom kawg.
Cov dej khaws cia hauv HPMC tau cuam tshuam ntau heev los ntawm qhov kub. Cov solubility, viscosity, kev nqus dej thiab hloov pauv ntawm HPMC tau hloov pauv ntawm HPMC hauv kev siv sib txawv. Nkag siab txog cov khoom siv kub ntawm HPMC yog qhov tseem ceeb rau kev txhim kho cov qauv ua haujlwm tau zoo thiab muaj kev lag luam zoo rau ntau yam kev lag luam. Yog li, cov kws tshawb nrhiav thiab cov kws tshawb fawb thiab cov kws tshawb fawb yuav tsum xav txog qhov cuam tshuam ntawm cov khoom siv hauv HPMC los ua kom lawv txoj kev siv thiab txhim kho lawv cov haujlwm.
Lub sij hawm Post: Aug-31-2023