Fabrication of Integrated Composite Particles by Electrostatic Adsorption Technique and Microstructural Control of Functional Nanocomposits

Abstract

In the conventional processing technique for fabricating nanocomposites, mechanical mixing of raw powders in a ball mill has often been conducted. However, this technique might be insufficient to fabricate nanocomposites with homogeneous microstructures due to the aggregation of nano-sized raw powder. In order to overcome these issues, novel processing technique was successfully developed to fabricate integrated composite powders by present author. The fabrication of integrated composite powder involves the sequential adsorption of oppositely charged polyelectrolytes, i.e., PSS (Poly(sodium 4-styrene sulfonate)) and PDDA (poly(diallyldimethylanm oniumchloride)) on surface of matrix and additive grains, respectively in order to produce electrically charged particles. And then, the integrated composite particles, i.e., large-sized-particles coated with nanoparticles were successively obtained by the mixing with oppositely charged particles in the solvent. The proposed technique was one of the simplest and the most versatile processing techniques for fabricating integrated composite particles for nanocomposite materials. It was concluded that the proposed technique examined in this study provides an efficient tool for fabricating the microstructural controlled nanocomposite.