强激光与粒子束2012，Vol.24Issue(9)：2125-2129,5.DOI:10.3788/HPLPB20122409.2125
聚苯乙烯多孔薄膜的密度梯度控制
Control of density gradient in polystyrene porous films
摘要
Abstract
Silica colloidal crystals and multilayer heterostructures were fabricated by using monodisperse silica micro-spheres. Non-closely-packed colloidal crystals, whose volume ratio of voids was larger than 26% in face-centered closely-packed structure, were obtained after calcining and etching silica colloidal crystals sequentially. The volume ratio of voids increases as the etching time is prolonged. It was found that the smaller the spheres forming colloidal crystals were, the bigger the ratio of voids was, after colloidal crystals were etched under the same condition. Graded silica colloidal films were obtained by calcining and etching silica multilayer heterostructures, which were used as templates to prepare polystyrene porous films with graded density. The different layers in porous films displayed a smooth transition where there were no obvious interlayer defects. Moreover, there were no large channels between pores that existed in conventional three-dimensionally ordered porous structures.关键词
密度梯度/聚苯乙烯/多孔/胶体晶体/刻蚀Key words
density gradient/ polystyrene/ porous/ colloidal crystal/ etching分类
化学化工引用本文复制引用
严鸿维,张林,吕海兵,袁晓东,任洪波..聚苯乙烯多孔薄膜的密度梯度控制[J].强激光与粒子束,2012,24(9):2125-2129,5.基金项目
中国工程物理研究院发展基金项目(2009A0302021) （2009A0302021）
