Lub lim tiam dhau los, peb tau tham txog qee cov khoom siv roj thiab hmoov hauv cov khoom siv tshuaj pleev ib ce. Niaj hnub no, peb yuav piav qhia ntxiv txog cov khoom siv matrix ntxiv: cov pos hniav thiab cov khoom hnyav.
Colloidal raw khoom - tus neeg saib xyuas ntawm viscosity thiab stability
Glial raw cov ntaub ntawv yog dej-soluble polymer tebchaw. Feem ntau ntawm cov tshuaj no tuaj yeem nthuav dav rau hauv colloid hauv dej los ua cov hmoov nplaum thiab daim ntawv. Lawv tuaj yeem siv los ua emulsifiers kom ruaj khov emulsions lossis tshem tawm. Tsis tas li ntawd, lawv tuaj yeem tsim cov yeeb yaj kiab thiab ua kom tuab gel. glial raw cov ntaub ntawv siv nyob rau hauv cov tshuaj pleev ib ce yog tsuas yog muab faib ua peb pawg: ntuj thiab hluavtaws, thiab semi hluavtaws.
Ntuj dej-soluble polymer tebchaw: feem ntau yog muab los ntawm cov nroj tsuag lossis tsiaj txhu, xws li cov hmoov txhuv nplej siab, cov pos hniav (xws li cov pos hniav Arabic), tsiaj gelatin, thiab lwm yam. thaj chaw ib puag ncig, thiab muaj kev pheej hmoo ntawm kev kis kab mob los ntawm cov kab mob lossis pwm.
Synthetic dej-soluble polymer tebchaw, suav nrog polyvinyl cawv, polyvinylpyrrolidone, polyacrylic acid, thiab lwm yam., muaj cov khoom ruaj khov, tsis tshua muaj tawv nqaij khaus, thiab tus nqi qis, yog li hloov cov dej-soluble polymer tebchaw ua lub ntsiab ntawm cov ntaub ntawv colloidal. Nws feem ntau yog siv los ua ib qho nplaum, thickener, zaj duab xis-tsim tus neeg sawv cev, thiab emulsifying stabilizer hauv tshuaj pleev ib ce.
Semi hluavtaws dej-soluble polymer tebchaw: Cov feem ntau muaj xws li methyl cellulose, ethyl cellulose, carboxymethyl cellulose sodium hydroxyethyl cellulose, guar gum thiab nws cov derivatives, thiab lwm yam.
Solvent raw cov ntaub ntawv - tus yuam sij rau dissolution thiab stability
Cov ntaub ntawv nyoos yog cov khoom tseem ceeb hauv ntau cov kua, muab tshuaj txhuam, thiab muab tshuaj txhuam raws li daim tawv nqaij. Thaum ua ke nrog lwm cov khoom xyaw hauv cov mis, lawv tuav qee yam khoom ntawm lub cev ntawm cov khoom. Cov khoom siv hnyav hnyav hauv cov tshuaj pleev ib ce feem ntau muaj xws li dej, ethanol, isopropanol, n-butanol, ethyl acetate, thiab lwm yam. Cov dej yog feem ntau siv hauv cov khoom siv tawv nqaij.
Post lub sij hawm: Lub Xya hli ntuj-30-2024
