Thickener hom thiab cov yam ntxwv
Cellulosic thickeners muaj cov thickening efficiency, tshwj xeeb tshaj yog rau cov thickening ntawm cov dej theem; lawv muaj kev txwv tsawg dua ntawm cov txheej txheem txheej thiab tau siv dav; lawv tuaj yeem siv rau ntau yam pH. Txawm li cas los xij, muaj qhov tsis zoo xws li kev ua haujlwm tsis zoo, kev sib tsoo ntau dua thaum lub sij hawm cov menyuam txheej, tsis muaj kev ruaj ntseg, thiab muaj kev cuam tshuam rau microbial degradation. Vim tias nws muaj viscosity tsawg nyob rau hauv siab shear thiab siab viscosity nyob rau hauv zoo li qub thiab qis shear, lub viscosity nce sai tom qab txheej, uas tuaj yeem tiv thaiv sagging, tab sis ntawm qhov tod tes, nws ua rau tsis zoo. Cov kev tshawb fawb pom tau hais tias raws li cov txheeb ze molecular hnyav ntawm cov thickener nce, lub spattering ntawm latex xim kuj nce. Cellulosic thickeners yog nquag txaws vim lawv cov txheeb ze molecular loj. Thiab vim tias cellulose ntau hydrophilic, nws yuav txo cov dej tsis kam ntawm cov xim zaj duab xis.
cellulosic thickener
Polyacrylic acid thickeners muaj zog thickening thiab leveling zog, thiab zoo lom neeg stability, tab sis rhiab heev rau pH thiab muaj dej tsis zoo.
polyacrylic thickener
Lub associative qauv ntawm associative polyurethane thickener raug puas tsuaj nyob rau hauv qhov kev txiav txim ntawm shear quab yuam, thiab lub viscosity txo. Thaum lub zog shear ploj lawm, lub viscosity tuaj yeem rov qab los, uas tuaj yeem tiv thaiv qhov tshwm sim ntawm sag hauv kev tsim kho. Thiab nws cov viscosity rov qab muaj qee yam hysteresis, uas yog qhov tsim nyog rau qib ntawm txheej zaj duab xis. Cov txheeb ze molecular loj (txhiab rau kaum tawm txhiab) ntawm polyurethane thickeners yog tsawg dua li cov txheeb ze molecular loj (ntau pua txhiab mus rau lab) ntawm thawj ob hom thickeners, thiab yuav tsis txhawb splashing. Polyurethane thickener molecules muaj ob pawg hydrophilic thiab hydrophobic pawg, thiab pawg hydrophobic muaj kev sib raug zoo nrog cov matrix ntawm txheej zaj duab xis, uas tuaj yeem txhim kho cov dej tsis kam ntawm cov yeeb yaj kiab txheej.
Post lub sij hawm: Mar-24-2023