Titanium dioxide yog ib qho ntawm feem ntau siv dawb pigments nyob rau hauv niaj hnub txheej ntau lawm. Nws zoo heev zais lub zog, whiteness, thiab huab cua tsis kam ua lub luag haujlwm txiav txim siab hauv cov tsos thiab ua haujlwm ntev ntawm cov khoom xim. Txawm li cas los xij, txawm tias titanium dioxide muaj kev ua tau zoo heev, kev tuav tsis raug thaum lub sij hawm tsim khoom lossis daim ntawv thov tuaj yeem cuam tshuam rau qhov kawg txheej zoo. Yog li ntawd, kev nkag siab txog cov lus ceeb toom tseem ceeb rau kev siv titanium dioxide hauv cov txheej txheej yog qhov tseem ceeb rau kev ua kom cov khoom sib xws thiab kev ua kom zoo dua qub.
1. Xaiv txoj cai ntawm Titanium Dioxide
Xaiv cov qib tsim nyog thiab siv lead ua hom titanium dioxide yog lub hauv paus ntawm cov qauv txheej txheem ruaj khov.
Rutile titanium dioxidemuaj ntau dua refractive index, zoo heev huab cua tsis kam, thiab muaj zog UV tiv thaiv, ua rau nws nyiam xaiv rau sab nrauv thiab industrial coatings.
Anatase titanium dioxidemuab siab dawb ntawm tus nqi qis thiab feem ntau yog siv rau hauv cov txheej sab hauv lossis cov ntawv thov nrog cov kev xav tau ntawm kev ua haujlwm nruab nrab.
Cov neeg tsim khoom yuav tsum xaiv cov qauv siv lead ua tsim nyog, qhov loj me, thiab kev kho saum npoo raws li txheej txheej, daim ntawv thov ib puag ncig, thiab cov hom phiaj ua haujlwm kom ntseeg tau tias qhov zoo tshaj plaws whiteness, zais lub zog, thiab kav ntev.
2. Tswj tus nqi ntxiv thiab ua ntu zus
Ntau titanium dioxide tsis yog ib txwm txhais tau tias kev ua tau zoo dua.
Kev sib ntxiv ntau dhau tuaj yeem txhim kho cov xim dawb tab sis kuj tuaj yeem ua rau tsis zoo, kev ntxhib los mos ntawm qhov chaw, thiab txawm tias ntab lossis hmoov teeb meem.
Titanium dioxide yuav tsum tau ntxivmaj mammus rau hauv lub dispersion system thiab tag nrho sib xyaw los ntawm siab - ceev dispersion, sib tsoo, los yog milling khoom los tiv thaiv agglomeration.
Dispersion kom zoo pab ua kom tiav cov txheej txheej smoother, txhim kho gloss, thiab kev ua haujlwm zais zoo dua.
3. Ua tib zoo saib kom ntub dej thiab tawg
Titanium dioxide particles muaj ib qho℃ntawm hydrophobicity. Yog tias tsis muaj dej txaus, lawv zoo li tsim cov sib sau ua ke uas cuam tshuam rau zaj duab xis uniformity.
Yuav kom ntseeg tau tias dispersion zoo, manufacturers yuav tsum:
- Ua ntej-disperse titanium dioxide ua ntej kev koom ua ke;
- Siv cov tshuaj dispersants los yog cov khoom ntub dej sib haum nrog cov txheej txheem xaiv;
- Kho cov mis raws li seb lub cev puas yog dej -raws lossis hnyav-raws li.
Ib qhov zoo-tsim dispersion system ua kom zoo dua qub, ua kom du, thiab npog.
4. Tswj kom zoo pH thiab kub thaum lub sij hawm tsim khoom
Titanium dioxide tuaj yeem ua rau muaj kev cuam tshuam saum npoo raws li muaj zog acidic lossis alkaline tej yam kev mob, uas tuaj yeem txo nws cov dispersibility thiab tag nrho kev ua tau zoo.
Thaum lub sij hawm tsim khoom, nws yog ib qho tseem ceeb rau:
- Khaws tus nqi pH ntawm cov qauv tsim nyob rau hauv qhov chaw ruaj khov thiab tsim nyog;
- Tsis txhob cuam tshuam ntev rau qhov kub siab, tshwj xeeb tshaj yog thaum lub sij hawm siab - shear processing;
- Saib xyuas qhov kub thiab txias hloov los tiv thaiv particle agglomeration lossis kev ua haujlwm degradation.
Cov txheej txheem ua haujlwm ruaj khov pab tswj cov titanium dioxide cov khoom muaj txiaj ntsig.
5. Tiv thaiv Photocatalytic Reactions thiab Pigment Degradation
Txawm tias rutile titanium dioxide, paub txog nws cov huab cua zoo heev, tuaj yeem ua rau muaj kev cuam tshuam degradation thaum muaj lub teeb muaj zog, ua rau muaj xim tsis zoo lossis kev laus ntxov ntawm cov txheej.
Txhawm rau zam cov teeb meem zoo li no:
- Xaivnto - kho titanium dioxide, xws li qib coated nrog alumina los yog silica, kom txo cov kev ua haujlwm photocatalytic;
- Ua tib zoo sib npaug cov additives kom txo qis cov tshuaj lom neeg tsis zoo;
- Siv cov qib tshwj xeeb uas tsim los rau sab nraum zoov lossis ntev - tiv thaiv lub sijhawm.
Cov kev ntsuas no zoo heev txhim kho cov txheej txheem ntev thiab ntev -lub sij hawm whiteness.
6. Ua raws li kev khaws cia thiab kev coj ua kom raug
Titanium dioxide yog cov hmoov zoo thiab tuaj yeem nqus dej noo, ncuav mog qab zib, lossis nyiam cov kab mob.
Cov kev coj ua uas pom zoo muaj xws li:
- Khaws rau hauv qhov chaw qhuav, ventilated;
- Tsis txhob muaj cov av noo thiab ncaj qha tshav ntuj;
- Do los yog loosen cov hmoov ua ntej siv los xyuas kom meej flowability;
- Siv cov cuab yeej tiv thaiv kom tsis txhob raug cov plua plav thaum tuav.
Kev khaws cia zoo thiab cov txheej txheem ua haujlwm nyab xeeb txhawb nqa cov khoom zoo ib yam thiab txhim kho kev nyab xeeb ntawm chaw ua haujlwm.
Xaus
Kev siv zoo ntawm titanium dioxide hauv txheej txheej yuav tsum tau ua tib zoo xaiv cov khoom siv, sib txuas ntxiv, dispersion thiab ntub dej, pH thiab kub tswj, photocatalytic tsis kam, thiab cia kom zoo.
Thaum siv kom raug, titanium dioxide ho txhim kho cov xim dawb, zais lub zog, gloss, thiab lub neej kev pab cuam -thaum kuj txo cov nqi tsim khoom. Cov neeg tsim khoom yuav tsum tsim kom muaj tus qauv tsim, kev tshawb fawb- raws li cov txheej txheem kev khiav hauj lwm raws li lawv cov qauv txheej txheem los xyuas kom meej tias titanium dioxide ua tau zoo tshaj plaws thiab pab txhawb kom ruaj khov, siab - cov khoom zoo kawg nkaus.