Hydrated alumina surface treatment on a titanium dioxide pigment: changes at acidic and basic pH.
作者： S.G. Croll , C.A. Taylor
DOI: 10.1016/J.JCIS.2007.06.008
关键词: Dissolution 、 Suspension (chemistry) 、 Thermogravimetry 、 Titanium 、 Particle 、 Chemistry 、 Titanium oxide 、 Aqueous solution 、 Inorganic chemistry 、 Titanium dioxide
摘要: Amphoteric, inorganic particles used as pigments and extenders in dried coatings are not completely inert, particularly when exposed to acidity similar atmospheric pollution, or a water-borne paint suspension at alkaline pH. Changes these materials may harm the integrity of coating thus its performance during weathering affect colloidal stability storage within liquid paint. The effect on aqueous titanium dioxide pigment suspensions was examined under various pH conditions. A substantial amount aluminum dissolved, but little silicon titanium. Dissolution occurred both acid alkali leaving different balance hydrated alumina phases overall surface composition. particle were apparent topography, properties by thermogravimetry. Such changes show that other, more complicated, be possible, an medium where there many other ingredients solution suspension.
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