Organic/inorganic nano-composites by dispersion of porous silica through pseudo-

2020-01-28 10:34:32

The silica particles inner inorganic

责任者: Matsuda, N.;Hirose, M.;Tanahashi, M.;Takeda, K. 单位: Nagoya Univ., Japan 来源出处: Journal of the Society of Materials Science, Japan(J. Soc. Mater. Sci. Jpn. (Japan)),2004/12/,53(12):1295-300 摘要: Prior to the preparation of nano-scale composites, porous silica was prepared by the pseudo-phase separation method previously researched by the authors. The structure of the particle consists of two layers. One was the outer shape whose diameter was about 100 μm and the inner structure was constructed by very fine particles. The diameter of the inner particles, formed by the agglomeration of the original silica particles, was about 20~30 nm. The bonding strength between the inner agglomerated particles was controlled by the sintering temperature. The porous silica was blended with ethylene-vinyl alcohol copolymer and polystyrene in a Microlabo kneader. The diameter of the inner particles dispersed within the organic/inorganic composite was less than 100 nm. Although the inner particles pull strongly against each other, the re-agglomeration was probably prevented by the insertion of the viscous polymeric materials between the inner particles. The relation between the force of agglomeration by the surface potential and the dispersion by the shear in the kneader is discussed and the fundamental characteristics are preliminarily studied 关键词: nanocomposites;nanoparticles;organic-inorganic hybrid materials;particle size;phase separation;plastics;polymer blends;silicon compounds;sintering;surface potential;organic-inorganic nanocomposites;porous silica;pseudo-phase separation;engineering plastics;agglomeration;silica particles;bonding strength;sintering;ethylene-vinyl alcohol copolymer;polystyrene;microlabo kneader;viscous polymeric materials;surface potential;agglomerated particle;100 micron;SiO2