Viscosity yog qhov tseem ceeb rau kev ua haujlwm ntawm hydroxypropyl methylcellulose (HPMC). HPMC yog dav siv nyob rau hauv ntau yam lag luam vim nws cov dej-soluble polymer, non-ionic, non-toxic thiab lwm yam khoom. Nws muaj cov yeeb yaj kiab zoo heev, ua kom tuab thiab nplaum, ua rau nws muaj kev xaiv zoo rau ntau yam kev siv.
Viscosity yog ib qho kev ntsuas ntawm cov kua dej hauv lub cev kom ntws. Hauv lwm lo lus, nws ntsuas qhov tuab lossis nyias ntawm cov kua dej. Viscosity yog ib qho tseem ceeb rau HPMC kev ua tau zoo vim nws cuam tshuam cov yam ntxwv ntws ntawm cov tshuaj. Qhov siab dua qhov viscosity, qhov thicker cov tshuaj thiab qhov qeeb nws ntws. Viscosity muaj qhov cuam tshuam ncaj qha rau daim ntawv thov thiab kev ua haujlwm ntawm HPMC.
Ib qho ntawm cov ntawv thov tseem ceeb ntawm HPMC yog ua cov thickener. Vim nws qhov hnyav molecular hnyav thiab hydrogen bonding zog, HPMC tsim ib tug tuab gel zoo li cov khoom thaum yaj hauv dej. Lub viscosity ntawm HPMC yog qhov tseem ceeb hauv kev txiav txim siab qhov sib xws ntawm cov tshuaj. Qhov siab dua qhov viscosity, qhov thicker cov tshuaj. Cov cuab yeej no ua rau nws zoo tagnrho rau cov ntaub ntawv tuab hauv cov khoom xws li xim, coatings thiab adhesives.
Lwm daim ntawv thov tseem ceeb ntawm HPMC yog tshuaj. Nws yog siv los ua ib qho excipient nyob rau hauv ntau yam formulations xws li ntsiav tshuaj, tsiav tshuaj thiab tshuaj pleev. Lub viscosity ntawm HPMC ua lub luag haujlwm tseem ceeb hauv kev tsim cov khoom no. Nws cuam tshuam rau qhov ntws, sib xws thiab kev ruaj ntseg ntawm cov formulation. Tsim nyog viscosity yuav tsum tau los xyuas kom meej tias cov khoom yog ib qho yooj yim mus lis thiab yuav tsum tau dosed kom raug. HPMC muaj viscosity tsawg thaum yaj hauv dej, ua rau nws zoo tagnrho rau kev npaj cov kev daws teeb meem thiab kev ncua.
Viscosity tseem ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm ntawm HPMC rau kev tsim kho kev lag luam. Nws yog dav siv los ua ib qho thickener thiab binder hauv cov khoom siv cement xws li mortar thiab grout. Lub viscosity ntawm HPMC txiav txim siab txog kev ua tau zoo thiab yooj yim ntawm kev siv cov ntaub ntawv no. Kev tsim nyog viscosity yuav tsum tau ua kom ntseeg tau tias cov khoom siv tuaj yeem siv tau yooj yim thiab sib kis sib npaug. HPMC muaj viscosity stability zoo heev uas ua rau nws zoo tagnrho rau kev tsim kho.
Viscosity tseem cuam tshuam rau lub txee lub neej ntawm HPMC cov khoom. Lub viscosity ntawm HPMC tuaj yeem nce lossis txo vim muaj ntau yam xws li kub, pH thiab concentration. Kev hloov pauv hauv viscosity tuaj yeem cuam tshuam cov khoom lag luam thiab kev ua haujlwm, ua rau cov khoom lag luam tsis ua haujlwm lossis txo cov txiaj ntsig. Yog li, cov viscosity ntawm HPMC-raws li cov khoom yuav tsum tau tswj xyuas kom lawv ruaj khov thiab ua tau zoo.
Viscosity yog qhov tseem ceeb rau kev ua haujlwm ntawm hydroxypropylmethylcellulose (HPMC). Nws cuam tshuam cov yam ntxwv ntws, tuab thiab kev ua haujlwm ntawm HPMC cov khoom. Txoj cai viscosity yuav tsum tau ua kom ntseeg tau tias cov khoom siv tau yooj yim rau kev thov thiab ntsuas, muaj kev ruaj ntseg zoo thiab ua haujlwm zoo rau lub sijhawm. HPMC muaj viscosity ruaj khov zoo heev, uas ua rau nws muaj kev xaiv zoo rau ntau yam kev siv hauv kev lag luam xws li tshuaj, kev tsim kho thiab kev saib xyuas tus kheej.
Post lub sij hawm: Sep-07-2023