Hydroxypropyl methylcellulose (HPMC) yog ib qho uas tsis yog-ionic dej-soluble cellulose ether dav siv hauv kev tsim kho, tshuaj, zaub mov, tshuaj pleev ib ce thiab tshuaj industries. Cov yam ntxwv viscosity ntawm nws cov tshuaj aqueous yog qhov tseem ceeb cuam tshuam rau nws cov kev ua haujlwm.
1. Cov yam ntxwv tseem ceeb ntawm HPMC
AnxinCel®HPMC yog cellulose derivative synthesized los ntawm kev qhia hydroxypropyl thiab methyl pawg rau hauv cov saw molecular ntawm cellulose. Nws muaj cov dej solubility zoo thiab cov viscosity siab, thiab feem ntau yog siv los npaj cov kev daws teeb meem nrog cov khoom tshwj xeeb rheological. Cov yam ntxwv no ua rau HPMC tau siv dav hauv cov txheej txheem, cov nplaum, cov tshuaj tiv thaiv kev tso tawm, cov khoom noj ntxiv thiab lwm yam lag luam.
2. Viscosity yam ntxwv ntawm HPMC aqueous tov
Cov yam ntxwv viscosity ntawm HPMC aqueous tov yog cuam tshuam los ntawm ntau yam, feem ntau suav nrog cov concentration, kub, shear tus nqi, pH tus nqi thiab cov qauv molecular.
Kev cuam tshuam ntawm concentration ntawm viscosity
Lub viscosity ntawm HPMC aqueous tov nce nrog nce concentration. Thaum cov concentration ntawm HPMC tsawg, cov tshuaj aqueous yog nyias thiab muaj viscosity tsawg; Raws li qhov concentration nce, kev sib cuam tshuam ntawm cov molecules nce, thiab cov viscosity ntawm cov tshuaj aqueous nce ntau. Feem ntau, cov viscosity ntawm HPMC cov tshuaj yog exponentially muaj feem xyuam rau nws cov concentration, tab sis nws nyhav ruaj khov ntawm ib tug tej yam concentration, uas qhia cov viscosity yam ntxwv ntawm cov tshuaj.
Qhov cuam tshuam ntawm qhov kub thiab txias ntawm viscosity
Qhov kub thiab txias yog qhov tseem ceeb cuam tshuam rau viscosity ntawm AnxinCel®HPMC aqueous kua. Raws li qhov kub nce siab, cov hydrogen bonds thiab hydrophobic kev sib cuam tshuam hauv HPMC molecules yuav tsis muaj zog, ua rau txo qis hauv kev sib khi quab yuam ntawm cov molecules, yog li txo cov viscosity ntawm cov kua dej aqueous. Feem ntau hais lus, qhov viscosity ntawm HPMC aqueous tov qhia tau hais tias qhov kev poob qis tseem ceeb nrog qhov kub thiab txias, tshwj xeeb tshaj yog nyob rau hauv qhov kub siab dua. Cov yam ntxwv no ua rau HPMC muaj peev xwm tswj tau zoo dua hauv qee qhov kev siv ntsuas kub.
Cov nyhuv ntawm shear tus nqi ntawm viscosity
HPMC aqueous tov qhia pom cov yam ntxwv ntawm Newtonian kua dej ntawm tus nqi qis, uas yog, qhov viscosity kuj ruaj khov; Txawm li cas los xij, ntawm qhov siab shear tus nqi, viscosity ntawm HPMC cov tshuaj yuav txo qis, qhia tias nws muaj shear thinning zog. HPMC molecules muaj qee yam rheological zog. Ntawm qhov qis shear tus nqi, cov saw hlau molecular yog ntau twisted, tsim kom muaj kev tiv thaiv ntau dua, uas yog manifested li viscosity ntau dua; Nyob rau hauv siab shear tus nqi, lub molecular chains yuav stretch, lub fluidity yog enhanced, thiab lub viscosity txo.
Kev cuam tshuam ntawm pH tus nqi ntawm viscosity
HPMC aqueous tov feem ntau tswj cov viscosity ruaj khov nyob rau hauv nruab nrab rau cov tsis muaj zog alkaline tej yam kev mob. Nyob rau hauv ib puag ncig muaj zog acid lossis muaj zog puag ncig, HPMC cov molecules tuaj yeem raug cov tshuaj tiv thaiv protonation lossis deprotonation, uas ua rau muaj kev hloov pauv hauv hydrophilicity, hydrophobicity thiab kev sib cuam tshuam ntawm cov molecules, yog li cuam tshuam rau viscosity ntawm cov kua dej aqueous. Raws li ib txwm muaj, kev hloov pauv hauv pH tsis tshua muaj txiaj ntsig ntawm viscosity ntawm HPMC cov kev daws teeb meem, tab sis nyob rau hauv cov xwm txheej pH huab cua, qhov hloov pauv viscosity yuav pom tseeb dua.
Cov nyhuv ntawm cov qauv molecular ntawm viscosity
Cov yam ntxwv viscosity ntawm HPMC yog ze ze rau nws cov qauv molecular. Qib ntawm kev hloov ntawm hydroxypropyl thiab methyl pawg hauv cov molecule muaj qhov cuam tshuam loj rau cov viscosity ntawm cov tshuaj aqueous. Qhov siab dua qhov kev hloov pauv ntawm pab pawg, qhov muaj zog hydrophilicity ntawm HPMC thiab siab dua qhov viscosity ntawm cov tshuaj. Tsis tas li ntawd, qhov hnyav molecular ntawm HPMC kuj yog qhov tseem ceeb cuam tshuam rau nws cov viscosity. Qhov loj dua qhov hnyav molecular, qhov ntev ntawm cov saw hlau molecular, thiab qhov muaj zog ntawm kev sib cuam tshuam ntawm cov molecules, ua rau muaj viscosity ntau dua ntawm cov tshuaj aqueous.
3. Qhov tseem ceeb ntawm cov yam ntxwv viscosity ntawm HPMC aqueous tov hauv daim ntawv thov
Cov yam ntxwv viscosity ntawm HPMC aqueous tov yog qhov tseem ceeb rau nws daim ntawv thov hauv ntau qhov chaw.
Kev tsim kho: HPMC feem ntau yog siv hauv cov cement mortar thiab nplaum, thiab muaj cov haujlwm ntawm thickening, khaws cov dej noo, thiab txhim kho kev tsim kho. Nws cov yam ntxwv viscosity ncaj qha cuam tshuam rau kev ua haujlwm thiab adhesion ntawm mortar. Los ntawm kev kho cov concentration thiab molecular qauv ntawm HPMC, rheological zog ntawm mortar tuaj yeem tswj tau, yog li txhim kho qhov yooj yim ntawm kev tsim kho.
Kev lag luam kws tshuaj: AnxinCel®HPMC aqueous tov feem ntau yog siv rau hauv kev npaj xws li tshuaj tiv thaiv-tso tawm cov neeg ua haujlwm, lub plhaub capsule, thiab cov tee qhov muag. Nws cov yam ntxwv viscosity tuaj yeem cuam tshuam qhov tso tawm ntawm cov tshuaj thiab tswj cov txheej txheem tso tawm ntawm cov tshuaj hauv lub cev. Los ntawm kev xaiv HPMC nrog qhov hnyav molecular thiab qib ntawm kev hloov pauv, kev tso tawm cov yam ntxwv ntawm cov tshuaj tuaj yeem hloov kho kom ua tiav cov txiaj ntsig zoo.
Kev lag luam zaub mov: HPMC yog siv los ua cov thickener, stabilizer, thiab emulsifier hauv kev ua zaub mov. Cov yam ntxwv viscosity ntawm nws cov kua aqueous cuam tshuam rau saj thiab ruaj khov ntawm cov zaub mov. Los ntawm kev kho hom thiab tus nqi ntawm HPMC siv, qhov kev ntxhib los mos ntawm cov zaub mov tuaj yeem tswj tau meej.
Kev lag luam tshuaj pleev ib ce: HPMC, ua cov thickener thiab stabilizer hauv cov tshuaj pleev ib ce, tuaj yeem txhim kho qhov kev ntxhib los mos ntawm cov khoom, muab nws tsim nyog fluidity thiab zoo. Nws cov yam ntxwv viscosity muaj qhov cuam tshuam tseem ceeb rau cov neeg siv kev paub ntawm cov khoom xws li cream, gels, thiab tshuaj zawv plaub hau.
Cov yam ntxwv viscosity ntawmHPMC Cov kev daws teeb meem aqueous cuam tshuam los ntawm ntau yam xws li concentration, kub, shear rate, pH tus nqi, thiab cov qauv molecular. Los ntawm kev kho cov xwm txheej no, daim ntawv thov kev ua tau zoo ntawm HPMC tuaj yeem ua kom tau raws li qhov xav tau ntawm cov kev lag luam sib txawv rau nws cov khoom rheological. Kev tshawb fawb tob txog cov yam ntxwv viscosity ntawm HPMC aqueous cov kev daws teeb meem tsis tsuas yog pab kom nkag siab txog nws cov yam ntxwv yooj yim, tab sis kuj muab kev qhia theoretical rau nws daim ntawv thov hauv kev tsim khoom tiag tiag.
Post lub sij hawm: Jan-16-2025