Preparation of SiO2@polystyrene@polypyrrole sandwich composites and hollow polypyrrole capsules with movable SiO2 spheres inside

Tongjie Yao; Quan Lin; Kai Zhang; Dengfeng Zhao; Hui Lv; Junhu Zhang; Bai Yang

doi:10.1016/j.jcis.2007.06.072

Preparation of SiO2@polystyrene@polypyrrole sandwich composites and hollow polypyrrole capsules with movable SiO2 spheres inside

J Colloid Interface Sci. 2007 Nov 15;315(2):434-8. doi: 10.1016/j.jcis.2007.06.072. Epub 2007 Aug 13.

Authors

Tongjie Yao¹, Quan Lin, Kai Zhang, Dengfeng Zhao, Hui Lv, Junhu Zhang, Bai Yang

Affiliation

¹ Key Laboratory for Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China.

PMID: 17706240
DOI: 10.1016/j.jcis.2007.06.072

Abstract

In this paper, we describe a flexible method for preparing conducting building blocks: SiO2@polystyrene@polypyrrole sandwich multilayer composites and hollow polypyrrole (PPy) capsules with movable SiO2 spheres inside. First, SiO2@polystyrene (PS) core/shell composites were synthesized, and then SiO2@PS@PPy sandwich multilayer composites were prepared by chemical polymerization of pyrrole monomer on the surface of SiO2@PS composites. Furthermore, hollow polypyrrole capsules with movable SiO2 spheres inside were obtained after removal of the middle PS layer. The diameter of sandwich multilayer composites could easily be controlled by adjusting the dosage of pyrrole monomer. The conductivities of composites increased with the increase of PPy content. After the insulating PS layer was selectively etched, the conductivities of hollow capsules with movable SiO2 spheres inside were much higher than those of the corresponding sandwich multilayer composites.