Titanium dioxide(TiO2) yog ntau yam xim siv nyob rau hauv ntau yam kev lag luam, nrog rau cov xim, coatings, plastics thiab tshuaj pleev ib ce. Nws cov khoom tshwj xeeb ua rau nws muaj qhov tseem ceeb hauv kev ua tiav cov xim uas xav tau, opacity thiab tiv thaiv UV. Txawm li cas los xij, kom paub txog tag nrho cov peev txheej ntawm TiO2 hmoov, kev ua kom muaj txiaj ntsig zoo yog qhov tseem ceeb. Dispersion kom raug txawm tias kev faib khoom thiab kev siv ntau tshaj plaws ntawm cov xim, ua rau kev txuag nqi thiab txhim kho cov khoom ua haujlwm.
Ib qho ntawm cov teeb meem tseem ceeb hauv kev siv TiO2 hmoov yog ua kom muaj kev sib cais tsis sib xws. Tsis zoo dispersion ua rau cov xim tsis sib xws, txo opacity, thiab txo cov khoom zoo. Txhawm rau daws qhov teeb meem no, cov tuam ntxhab thiab cov kws tshawb fawb tau tshawb nrhiav cov tswv yim tshiab los txhim kho kev siv TiO2 hmoov los ntawm kev siv thev naus laus zis zoo.
Ib txoj hauv kev zoo los txhim kho TiO2 dispersion yog siv cov cuab yeej dispersion siab heev. High-speed dispersers, hlaws mills, thiab ultrasonic homogenizers feem ntau yog siv cov cuab yeej ua kom tiav TiO2 nplua particle loj txo thiab sib faib faib nyob rau hauv ntau yam kua thiab khoom matrices. Cov khoom siv no pab ua kom tawg ntawm agglomerates thiab ntub dej ntawm TiO2 hais, yog li txhim kho qhov tawg thiab kev ua haujlwm ntawm cov khoom kawg.
Ntxiv nrog rau cov cuab yeej siv siab heev, xaiv cov khoom tawg yooj yim kuj tseem ceeb heev rau kev ua kom zoo dua ntawm TiO2 hmoov. Dispersants, xws li surfactants thiab polymer additives, ua lub luag haujlwm tseem ceeb hauv kev ruaj khov dispersions, tiv thaiv rov ua dua thiab txhawb nqa adhesion rau lub substrate. Los ntawm kev ua tib zoo xaiv cov dispersant tsim nyog raws li cov ntawv thov tshwj xeeb thiab matrix, cov tuam ntxhab tuaj yeem ua tiav cov txiaj ntsig zoo ntawm TiO2 hmoov thiab txhim kho nws cov kev ua tau zoo tag nrho.
Tsis tas li ntawd, kev sib xyaw ua ke ntawm cov thev naus laus zis kho saum npoo tuaj yeem cuam tshuam rau kev tawg thiab kev siv ntawm TiO2 hmoov. Cov txheej txheem kev hloov kho saum npoo av, xws li kev kho silane thiab alumina txheej, tuaj yeem txhim kho kev sib raug zoo ntawm TiO2 nrog cov matrices sib txawv, yog li txhim kho dispersion thiab adhesion. Cov kev kho saum npoo no tseem pab txhim kho huab cua tiv thaiv thiab ua haujlwm ntev ntawm TiO2-muaj cov khoom, ua rau lawv tsim nyog rau kev siv sab nraum zoov.
Lwm yam ntawm optimizing kev siv ntawmTiO2 hmoovyog txoj kev loj hlob ntawm customized dispersion daws rau tej kev siv. Kev lag luam sib txawv thiab cov khoom lag luam yuav xav tau cov tswv yim sib txawv tshwj xeeb kom ua tiav qhov kev ua tau zoo. Piv txwv li, nyob rau hauv cov xim thiab coatings kev lag luam, titanium dioxide dispersions formulated nrog rheology modifiers thiab stabilizers tuaj yeem txhim kho cov khoom ntws thiab tiv thaiv kev daws teeb meem, ua kom muaj xim zoo ib yam thiab kev pab cuam. Ib yam li ntawd, hauv kev lag luam plastics, masterbatch formulations nrog optimized TiO2 dispersion tuaj yeem txhim kho cov khoom siv kho qhov muag thiab kho qhov muag ntawm cov khoom kawg.
Hauv cov ntsiab lus, kev ua kom zoo rau kev siv cov hmoov TiO2 los ntawm kev ua kom muaj txiaj ntsig zoo yog qhov tseem ceeb rau kev ua kom nws cov txiaj ntsig zoo tshaj plaws hauv ntau yam kev siv. Los ntawm kev siv cov cuab yeej dispersion siab heev, xaiv cov dispersants uas tsim nyog, sib txuas cov thev naus laus zis kho deg thiab kho cov kev daws teeb meem dispersion, cov tuam txhab tuaj yeem ua tiav cov dispersion ntawm TiO2 thiab txhim kho nws cov kev ua tau zoo hauv cov khoom kawg. Cov tswv yim no tsis yog tsuas yog pab txuag cov nqi thiab txhim kho cov khoom zoo, tab sis kuj yog txoj hauv kev rau kev txuas ntxiv tshiab thiab kev nce qib ntawm titanium dioxide-based cov ntaub ntawv hauv kev lag luam thoob ntiaj teb.
Post lub sij hawm: Aug-13-2024