Hydroxypropyl methylcellulose (HPMC) yog ib qho cellulose ether uas yaj tau hauv dej uas tsis yog ionic siv dav hauv kev tsim kho, tshuaj, khoom noj, tshuaj pleev ib ce thiab kev lag luam tshuaj lom neeg. Cov yam ntxwv viscosity ntawm nws cov kua dej yog cov yam tseem ceeb uas cuam tshuam rau nws cov kev ua tau zoo ntawm daim ntawv thov.
1. Cov yam ntxwv tseem ceeb ntawm HPMC
AnxinCel®HPMC yog ib qho cellulose derivative uas tau tsim los ntawm kev qhia hydroxypropyl thiab methyl pawg rau hauv cov saw molecular ntawm cellulose. Nws muaj cov dej solubility zoo thiab viscosity siab, thiab feem ntau siv los npaj cov kua dej nrog cov khoom rheological tshwj xeeb. Cov yam ntxwv no ua rau HPMC siv dav hauv cov txheej txheem, cov nplaum, cov tshuaj tso tawm tas mus li, cov khoom noj khoom haus ntxiv thiab lwm yam lag luam.
2. Cov yam ntxwv ntawm viscosity ntawm HPMC aqueous kua
Cov yam ntxwv viscosity ntawm HPMC aqueous kua yog cuam tshuam los ntawm ntau yam, feem ntau suav nrog kev sib xyaw, kub, shear tus nqi, pH tus nqi thiab cov qauv molecular.
Cov nyhuv ntawm kev sib sau ua ke ntawm viscosity
Qhov viscosity ntawm HPMC aqueous kua nce nrog rau qhov nce concentration. Thaum qhov concentration ntawm HPMC qis, cov kua aqueous yog nyias thiab muaj viscosity qis; raws li qhov concentration nce, kev sib cuam tshuam ntawm cov molecules nce, thiab viscosity ntawm cov kua aqueous nce ntxiv ntau heev. Feem ntau, qhov viscosity ntawm HPMC kua yog exponentially cuam tshuam nrog nws qhov concentration, tab sis nws feem ntau ruaj khov ntawm qee qhov concentration, qhia txog cov yam ntxwv viscosity ntawm cov kua.
Cov nyhuv ntawm qhov kub thiab txias rau qhov viscosity
Kub yog ib qho tseem ceeb uas cuam tshuam rau qhov viscosity ntawm AnxinCel®HPMC aqueous solution. Thaum kub nce siab, cov hydrogen bonds thiab hydrophobic interactions hauv HPMC molecules yuav qaug zog, ua rau lub zog khi ntawm cov molecules txo qis, yog li txo qhov viscosity ntawm cov aqueous solution. Feem ntau, qhov viscosity ntawm HPMC aqueous solution qhia txog qhov sib txawv qis nrog rau qhov kub nce siab, tshwj xeeb tshaj yog nyob rau hauv qhov kub siab dua. Qhov cwj pwm no ua rau HPMC muaj peev xwm tswj tau zoo dua hauv qee qhov kev siv tswj kub.
Cov nyhuv ntawm qhov nrawm ntawm shear rau viscosity
HPMC cov kua dej qhia txog cov yam ntxwv ntawm Newtonian kua ntawm qhov qis shear rates, uas yog, qhov viscosity yog qhov ruaj khov; txawm li cas los xij, ntawm qhov siab shear rates, qhov viscosity ntawm HPMC kua yuav txo qis heev, qhia tias nws muaj shear thinning cov khoom. HPMC molecules muaj qee yam rheological khoom. Ntawm qhov qis shear rates, cov saw hlau molecular yog twisted ntau dua, tsim cov qauv tsis kam siab dua, uas yog manifested ua viscosity siab dua; ntawm qhov siab shear rates, cov saw hlau molecular feem ntau ncab, qhov fluidity yog txhim kho, thiab viscosity txo qis.
Cov nyhuv ntawm tus nqi pH rau ntawm viscosity
Feem ntau, cov kua dej HPMC tswj tau qhov viscosity ruaj khov nyob rau hauv qhov tsis muaj zog mus rau alkaline tsis muaj zog. Hauv qhov chaw muaj zog acid lossis lub hauv paus muaj zog, HPMC molecules yuav dhau los ua protonation lossis deprotonation reactions, 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. Nyob rau hauv cov xwm txheej ib txwm muaj, kev hloov pauv hauv pH muaj me ntsis cuam tshuam rau viscosity ntawm HPMC cov kev daws teeb meem, tab sis nyob rau hauv cov xwm txheej pH hnyav, qhov kev hloov pauv viscosity yuav pom tseeb dua.
Cov nyhuv ntawm cov qauv molecular ntawm viscosity
Cov yam ntxwv viscosity ntawm HPMC muaj feem cuam tshuam nrog nws cov qauv molecular. Qib ntawm kev hloov pauv ntawm hydroxypropyl thiab methyl pawg hauv molecule muaj qhov cuam tshuam loj rau viscosity ntawm cov kua dej. Qhov siab dua qib ntawm kev hloov pauv ntawm pawg, qhov muaj zog ntawm hydrophilicity ntawm HPMC thiab qhov siab dua viscosity ntawm cov kua. Tsis tas li ntawd, qhov hnyav molecular ntawm HPMC kuj yog qhov tseem ceeb uas cuam tshuam rau nws viscosity. Qhov loj dua qhov hnyav molecular, qhov ntev dua cov saw molecular, thiab qhov muaj zog ntawm kev sib cuam tshuam ntawm cov molecules, ua rau muaj viscosity ntau dua ntawm cov kua dej.
3. Qhov tseem ceeb ntawm cov yam ntxwv viscosity ntawm HPMC aqueous kua hauv daim ntawv thov
Cov yam ntxwv viscosity ntawm HPMC aqueous kua yog qhov tseem ceeb rau nws daim ntawv thov hauv ntau qhov chaw.
Kev Tsim Kho: HPMC feem ntau siv rau hauv cov cement mortar thiab cov nplaum, thiab muaj cov haujlwm ntawm kev ua kom tuab, khaws cov dej noo, thiab txhim kho kev ua haujlwm ntawm kev tsim kho. Nws cov yam ntxwv viscosity cuam tshuam ncaj qha rau kev ua haujlwm thiab kev nplaum ntawm mortar. Los ntawm kev kho qhov concentration thiab cov qauv molecular ntawm HPMC, cov khoom rheological ntawm mortar tuaj yeem tswj tau, yog li txhim kho qhov yooj yim ntawm kev tsim kho.
Kev lag luam tshuaj: AnxinCel®HPMC cov kua dej feem ntau siv rau hauv kev npaj xws li cov tshuaj tso tawm tas mus li, cov plhaub tshuaj ntsiav, thiab cov tshuaj qhov muag. Nws cov yam ntxwv viscosity tuaj yeem cuam tshuam rau qhov kev 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 kev hloov pauv, cov yam ntxwv tso tawm ntawm cov tshuaj tuaj yeem hloov kho kom ua tiav cov txiaj ntsig kho mob meej.
Kev lag luam zaub mov: HPMC siv ua cov khoom ua kom tuab, ruaj khov, thiab emulsifier hauv kev ua zaub mov. Cov yam ntxwv viscosity ntawm nws cov kua dej cuam tshuam rau qhov saj thiab kev ruaj khov ntawm cov zaub mov. Los ntawm kev kho hom thiab qhov ntau ntawm HPMC siv, cov qauv ntawm cov zaub mov tuaj yeem tswj tau meej.
Kev lag luam pleev kom zoo nkauj: HPMC, ua tus thickener thiab stabilizer hauv cov tshuaj pleev kom zoo nkauj, tuaj yeem txhim kho cov qauv ntawm cov khoom, muab nws cov kua dej kom zoo thiab muaj kev xav zoo. Nws cov yam ntxwv viscosity muaj qhov cuam tshuam tseem ceeb rau kev paub ntawm cov neeg siv khoom xws li tshuaj pleev, gels, thiab tshuaj zawv plaub hau.
Cov yam ntxwv ntawm viscosityHPMC Cov tshuaj aqueous raug cuam tshuam los ntawm ntau yam xws li kev sib xyaw, kub, shear rate, pH tus nqi, thiab cov qauv molecular. Los ntawm kev kho cov yam no, kev ua haujlwm ntawm daim ntawv thov ntawm HPMC tuaj yeem ua kom zoo dua los ua kom tau raws li qhov xav tau ntawm ntau yam lag luam rau nws cov khoom rheological. Kev tshawb fawb tob txog cov yam ntxwv viscosity ntawm HPMC cov tshuaj aqueous tsis yog tsuas yog pab kom nkag siab txog nws cov khoom yooj yim, tab sis kuj muab cov lus qhia theoretical rau nws daim ntawv thov hauv kev tsim khoom tiag tiag.
Lub sijhawm tshaj tawm: Lub Ib Hlis-16-2025