Organic Pigment Particles Coated with Colloidal Nano-Silica Particles via Layer-by-Layer Assembly

• DOI: 10.1021/cm048000b
• Publication Date: 2005-07-05T12:44:57Z
• Authors: Junjie Yuan; Shuxue Zhou; Bo You; Limin Wu
• Keywords: Colloidal Silica; Particle (ecology); Layer by layer

An organic pigment was successfully coated with colloidal silica particles using the layer-by-layer assembly technique to improve weatherability and dispersion ability in waterborne systems. It found that nano-silica content or thickness of shell could be modulated by numbers both polyelectrolyte layers layers. The first layer obviously increased particle size pigment, causing a relatively rough surface, an obvious augment thickness, broad pore distribution, but second third preferred fill pores caused silica, smooth slight increases surface Si content, narrow distribution. on surfaces scatter UV light especially after assembly.