Templated Synthesis of Silica Hollow Particles by Using Spray Pyrolysis

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Yun Seup Chung²  Seung Bin Park²  Jung Sun Lim²  Kikuo Okuyama¹ 

[1] Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University;Department of Chemical and Biomolecular Engineering, KAIST

关键词: Hollow Particle;    Spray Pyrolysis;    Polystyrene Template;   

DOI  :  10.1252/jcej.37.1099

来源: Maruzen Company Ltd

【 摘 要 】

References(19)Cited-By(13)It is commonly accepted that one hollow particle is formed from one droplet in conventional spray pyrolysis or drying. Therefore, the particles size distribution is closely related to the droplet size distribution. In this report, however, a new aerosol process was proposed, in which multiple hollow particles were produced from one liquid droplet with the aid of salt and polystyrene (PS) bead. In this process, the particles size and size distribution were determined by the PS beads, not by the droplets. Silica hollow particles of 160 nm in diameter and 10 nm in shell thickness were prepared after washing off the salt with water. Geometric mean dispersion of hollow particles were 1.02, whereas the geometric mean deviation of droplets was 1.3. The role of salt was to keep nano-size hollow particles desegregated while the PS template beads were burnt off at 500°C.

【 授权许可】

Unknown