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Super-dispersant ntawm cov kho mob deg Titanium Dioxide thiab nws cov ntawv thov Masterbatch
Nov 17, 2015

Hyperdispersant pib hauv lub xyoo 1970 los txog rau xyoo pua 20th, txog thaum nyob hauv lub 1980 txog qhov lawv npaj siab ua nyob rau lub mid 1990 ntawm lub xyoo pua 20th, hyperdispersants rau nws cov nuj nqi li, xyoo pua 20th sawv nyob rau hauv ntau dispersants, kuj yog ib qho lub additives zoo kawg li mas.

Titanium dioxide uas muaj xim inorganic masterbatches cov lug siv. Tab sis, nyob hauv tus txheej txheem, cov finer cov xim hais together, zaub loj hais rau zoo yam khoom, uas yuav siv tsis tau ncaj qha mus, nws yuav tsum tau decentralized. Xim dispersion txheej txheem cai yuav tsum muab faib ua peb theem: stabilization ntxoov, thinning thiab thinning. Deg kho yog txoj kev stabilization txog thinned pigments, xim hais rau tus deg sediments los yog coated ib leeg-molecule lossis molecules tej, xws li surfactants, modifiers, derivatives ntawm cov xim xwb.

Siv dispersants rau deg kho titanium dioxide, kev txhim kho dispersibility ntawm titanium dioxide, thwmsim nrhiav tau siv cov dispersants deg tshuaj titanium pab kev pom, txoj kev noj tej yam mob (kub, pH-tus nqi).

Hyperdispersant tus qauv molecular faib ua ob yam, qhov kev thauj tog rau nkoj pawg, xws li-NR2, - COOH, - SO3H, thiab hais txog, cov ncov qaumteb qabteb pawg ionic bonds, hydrogen bonds thiab van ua dawb Waals rog, thiab nruj nreem adsorbed rau ntawm qhov chaw, txwv tsis pub cov superplasticizer daws. Lwm yog solvated chains, uas ncaj qha thiab txiav txim seb tus stability ntawm dispersed pigments rau qhov hnyav. Rau no kawg, qhov yuav tsum tau muaj dispersing kuab tshuaj, solvated chains muaj lub siab affinity kom zoo solvation, Super-dispersant hauv hais xim tsim ib cov thickness ntawm txheej tiv rau ntawm qhov chaw, solvated chains ncab nyob hauv dispersing cov kuab tshuaj. Thaum cov xim hais adsorbed superplasticizer approached, vim adsorption txheej repulsion tias hais npleem sib, sij after dispersion ruaj khov ntawm cov xim hais nyob hauv nruab nrab.

Muab tshuaj TiO2, granule nto Day xwb, yog yooj yim thiab Super-dispersant anchoring pawg (- kom-), nyob rau ntawm qhov chaw uas titanium dioxide hais tsim ib txheej khoom kev pab tiv thaiv los ntawm Super dispersant solvated chains (hydrocarbon saw) tus barrier spatial, after ib dispersion ruaj khov nyhuv titanium dioxide.


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