Cov yam ntxwv cuam tshuam rau Dispersion ntawm Titanium
Dioxide nyob rau hauv Solvent-based Coatings
Titanium dioxide yog ib qho kev ua yeeb yaj kiab thib ob rau txheej txheej, uas tsis tsuas yog ua rau saum npoo ntawm cov khoom kom coated ci thiab dawb, tab sis kuj txhim kho huab cua tsis kam, tiv thaiv hmoov av thiab rheological zog ntawm txheej. Lub dispersion ntawm titanium dioxide muaj kev cuam tshuam ncaj qha rau cov txheej txheem tsim khoom, cov cuab yeej tsim khoom thiab cov khoom zoo. Kev nkag siab txog cov xwm txheej cuam tshuam rau kev tawg ntawm titanium dioxide hauv cov txheej txheem yuav tsis tsuas yog txhim kho cov txheej txheem zoo, tab sis kuj tseem yuav txo cov pa phem thiab ua kom muaj kev ua tau zoo ntawm kev lag luam huv hauv lub tebchaws.
Nyob rau hauv cov kuab tshuaj raws li coatings, ib zaug cov resin thiab hnyav roj tau txiav txim, daim ntawv thov cov yam ntxwv thiab kev ua tau zoo yam ntxwv ntawm titanium dioxide txiav txim qhov degree ntawm dispersion thiab dispersion stabilization ntawm titanium dioxide.
Ua ntej, qhov nruab nrab qhov loj me thiab qhov loj me ntawm kev faib tawm cuam tshuam rau titanium dioxide pigment kev ua haujlwm. Thaum cov titanium dioxide particle loj ntawm tsawg dua 200nm huab hwm coj feem pua ntawm 30 feem pua, qhov zeta muaj peev xwm yog li ntawm -70mv; yog tias qhov loj feem pua tsawg dua 20 feem pua, qhov zeta muaj peev xwm yog li ntawm -40mv, pom titanium dioxide particle loj qhov xwm txheej cuam tshuam rau nws cov khoom hluav taws xob saum npoo av, yog li cuam tshuam rau kev ua haujlwm ntawm qhov chaw adsorption. Nws yuav tsum tau muab sau tseg tias particle loj yuav tsum tsis txhob me dhau, txwv tsis pub nws yuav cuam tshuam rau lwm yam khoom ntawm titanium dioxide, nws yog qhov zoo tshaj plaws los tswj cov particle loj hauv (0115 ~ 013) Lm.
Qhov thib ob, cov ntsiab lus ntawm cov khoom siv soluble cuam tshuam rau kev ua haujlwm ntawm titanium dioxide. Nyob rau hauv cov txheej txheem sib xyaw ua ke, cov polarity ntawm cov ions muaj zog inorganic yuav offset titanium dioxide nto nqi, tab sis kuj tsis tuaj yeem tsim cov txheej txheem hluav taws xob muaj zog, kom cov adsorption ntawm titanium dioxide nto tsis muaj zog, yog li cov resin tsis tuaj yeem ua tau. yuav ruaj khov adsorbed nyob rau hauv titanium dioxide particle nto, yog li txo qhov degree ntawm titanium dioxide dispersion stabilization, uas ua rau nws rov qab mus rau ntxhib nyob rau hauv hnyav-raws li coatings.
Thib peb, qib ntawm cov roj nqus tau cuam tshuam rau titanium dioxide dispersion lossis dispersion stability. Kev nqus roj siab ntawm titanium dioxide sib tsoo dispersion, ib feem ntawm cov roj hnyav yuav nqus tau los ntawm titanium dioxide, kom cov roj yaj yaj tsis txaus, cov qib resin hnyav tau txo qis, ua rau cov adsorption ntawm titanium dioxide tsis muaj zog, ua rau nws tawg. thiab dispersion stability yog txo.
