title: Polyphosphazene Microcapsules Fabricated through Covalent Assembly.
abstract: Hollow polyphosphazene microcapsules have been fabricated by the covalent layer-by-layer assembly of polydichlorophosphazene (PDCP) and hexamethylenediamine (HDA) on aminosilanized silica particles, followed by core removal in a HF/NH(4) F solution. The hollow and intact microcapsules in both wet and dry states have been characterized by transmission electron microscopy and confocal laser scanning microscopy. The chemical structure of the microcapsules has been verified by FT-IR spectroscopy. The microcapsules could be hydrolytically degraded in a phosphate buffer at biological pH.
authors.affiliation: Key Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, and Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China.
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Feng
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Fan
authors.forename: Hongxia
authors.initials: H
authors.lastname: Wang
authors.forename: Changyou
authors.initials: C
authors.lastname: Gao
authors.forename: Jiacong
authors.initials: J
authors.lastname: Shen