HPMC, tseem hu ua hydroxypropy kasthylulose, yog dej-soluble polymer dav siv nyob rau hauv lub tshuaj pleev ib ce, tshuaj thiab khoom noj khoom haus. Lub polymer yog muab los ntawm cellulose, lub ntuj muaj nyob hauv cov nroj tsuag. HPMC yog ib qho zoo tshaj plhuab tuab siv kom nce viscosity ntawm ntau yam kev daws teeb meem. Nws lub peev xwm los tsim cov kua nplaum thixotropic kuj tseem ua rau nws xaiv nrov hauv ntau daim ntawv thov.
Thickening cov khoom ntawm HPMC
Cov khoom siv thicking ntawm HPMC tau paub zoo hauv kev lag luam. HPMC tuaj yeem nce viscosity ntawm kev daws teeb meem los ntawm kev tsim cov gel network uas cuab cov dej ntxaij dej lwg. HPMC hais ua ib gel network thaum hydrated hauv dej thiab nyiam sib los ntawm hydrogen bonds. Lub network tsim ib qho peb-sablaj uas nce viscosity ntawm kev daws.
Ib qho ntawm qhov tseem ceeb ntawm kev siv HPMC ua cov tuab tuab yog tias nws tuaj yeem thicken kev daws teeb meem yam tsis muaj kev cuam tshuam rau nws cov xim lossis xim. HPMC yog cov tsis-ionic polymer, uas txhais tau tias nws tsis cuam tshuam dab tsi rau kev daws teeb meem. Qhov no ua rau nws zoo tagnrho rau kev siv hauv cov qauv ntshiab lossis pob tshab.
Lwm qhov zoo dua ntawm HPMC yog tias nws tuaj yeem ua cov kev daws teeb meem tuab ntawm cov kev ua kom muaj ntau. Qhov no txhais tau tias tsuas yog ib qho nyiaj me me ntawm HPMC xav tau kom ua tiav qhov xav tau. Qhov no tuaj yeem txuag cov nqi rau cov tuam ntxhab thiab muab cov qhua lag luam nrog cov khoom lag luam ntau dua.
Thixotropy ntawm hpmc
Thixotropy yog cov cuab yeej ntawm cov khoom kom txo qis hauv viscosity thaum raug rau shear kev nyuaj siab thiab rov qab mus rau nws cov viscosity thawj thaum cov kev ntxhov siab raug tshem tawm. HPMC yog cov khoom siv thixotropic, lub ntsiab lus nws kis lossis hliv tau yooj yim hauv qab shear kev ntxhov siab. Txawm li cas los xij, ib zaug cov kev ntxhov siab raug tshem tawm, nws rov qab los nplaum thiab tuab dua.
Lub Pixotropic cov khoom ntawm HPMC ua kom nws zoo tagnrho rau ntau daim ntawv thov. Piv txwv li, nws feem ntau siv hauv cov xim pleev xim, raws li lub tsho tuab tuab ntawm ib qho chaw. Lub tswv yim thixotropic ntawm HPMC ua kom paub meej tias cov txheej tseem nyob saum npoo yam uas tsis muaj Sagging lossis khiav. HPMC kuj tseem siv nyob rau hauv kev lag luam khoom noj ua cov tuab rau cov kua thiab hnav khaub ncaws. Lub zog thixotropic ntawm HPMC ua kom paub tseeb tias cov kua pleev xim lossis hnav khaub ncaws tsis txia los ntawm cov diav lossis cov phaj, tab sis hloov qis thiab xwm yeem.
HPMC yog cov neeg siv hluav taws xob ntau rau ntau yam nrog ntau cov kev siv hauv kev lag luam ntau yam. Nws cov khoom siv thickening thiab thixotropic cov khoom ua rau nws zoo tagnrho rau kev pleev xim, chaw muag tshuaj thiab khoom noj khoom haus. HPMC yog qhov zoo tshaj plaws thickener, nce viscosity ntawm kev daws teeb meem yam tsis cuam tshuam rau nws txoj kev pom meej lossis xim. Nws lub tswv yim thixotropic kom ntseeg tau tias kev daws tsis tau dhau los ua tuab lossis nyias nyias, nyob ntawm daim ntawv thov. HPMC yog qhov khoom siv tseem ceeb hauv ntau cov khoom, thiab nws cov txiaj ntsig ntau ua rau nws xaiv tau rau cov neeg tsim khoom lag luam thiab cov neeg lag luam.
Lub Sijhawm Post: Lub Yim Hli-25-2023