Kev txhim kho ntawm Dej Dispersibility ntawm Titanium Dioxide
Titanium dioxide tau siv ntau thiab ntau dua hauv cov xim emulsion, ntawv, tshuaj pleev ib ce thiab tshuaj fibers rau whitening, matting, tiv thaiv tshav ntuj thiab txhim kho opacity vim nws zoo heev nkaum hwj chim, whiteness, lub teeb reflectivity thiab lub teeb refractivity. Raws li cov ntawv thov no yog tag nrho cov dej-raws li, titanium dioxide siv yuav tsum muaj dej dispersibility zoo heev.
Los ntawm aqueous dispersion peb txhais tau hais tias cov titanium dioxide yog sib npaug zos rau hauv lub aqueous system thiab tsis ntab rau saum npoo dej los yog nws puas mus rau hauv qab. Hauv lwm lo lus, qhov saum npoo ntawm titanium dioxide yuav tsum nyob rau hauv lub xeev tseem ceeb uas nws tsis yog hydrophilic lossis hydrophobic.
Yog tsis muaj kev kho deg lossis tsuas yog tom qab cov txheej txheem txheej txheem, qhov saum npoo ntawm titanium dioxide feem ntau yog hydrophobic lossis hydrophobic, thiab cov dej dispersion tsis zoo heev. Thaum titanium dioxide ntxiv rau hauv lub cev dej, nws tog hauv qab los yog ntab rau saum npoo dej sai heev, txawm tias nws tau sib zog nrog cov neeg kho tshuab sab nraud, nws yuav nkag mus rau hauv qab los yog ntab rau saum npoo dej dua hauv. 0 5-1 teev. Hauv lwm lo lus, titanium dioxide tsis tuaj yeem nyob ruaj khov hauv cov dej hauv dej. Hauv cov txheej txheem tshwj xeeb ntawm kev siv, vim qhov tsis zoo ntawm cov titanium dioxide dispersion pigments, lawv zoo li delaminate nrog resins los yog dispersion cov cab kuj (xws li dej), ua rau tsis ua hauj lwm los yog siv kom zoo. Yog li ntawd, rau titanium dioxide siv nyob rau hauv aqueous systems, tshwj xeeb organic nto kho yuav tsum tau siv los txhim kho lawv cov dej dispersibility.
Feem ntau, cov tshuaj kho qhov chaw tseem ceeb siv los txhim kho cov dej dispersibility ntawm titanium dioxide yog cov pa roj carbon polyhydroxy tsawg, ntev carbon chain unit alcohols, ntev carbon chain unit acids, tsawg carbon polyhydroxy acids, fatty acids ntsev, organic amines, lipids, tsis. -ionic surfactants, thiab lwm yam. Nrog rau cov ntaub ntawv no, tom qab ib txoj kev kho kom haum, ib tug kuj zoo dispersion dej kuj yuav tau. Txawm li cas los xij, cov tshuaj kho saum npoo no muaj qee qhov tsis zoo rau qhov sib txawv.
Nyob rau hauv cov ntaub ntawv ntawm cov dej dispersible titanium dioxide nto kho mob, cov khoom siv tseem ceeb siv yog polymeric active silicone, uas tsis muaj cov kuab tshuaj phem thiab tsis tso cov pa phem lossis electrolytes thaum siv. Qhov kev kho dej-dispersible nto no tsis ua rau muaj kev nce ntxiv hauv kev tsim cov titanium dioxide los yog siv cov txheej txheem, tab sis tib lub sijhawm kuj tseem tuaj yeem txhim kho cov xim dawb ntawm titanium dioxide, xim ploj thiab huab cua tsis kam thiab lwm yam xim xim.
