The preparation of composite microsphere with hollow core/porous shell structure by self-assembling of latex particles at emulsion droplet interface

Journal of Colloid and Interface Science
Xiao Dong HeZhi Cheng Zhang

Abstract

A submicrometer-scaled polystyrene/melamine-formaldehyde hollow microsphere composite was prepared by self-assembling of sulfonated polystyrene (SPS) latex particles at the interface of emulsion droplets and then being fixed in place using a hard melamine-formaldehyde (MF) composite layer. For control-released purposes, the influential factors that control the size and uniformity of the packed-droplets and the permeability of the composite shell, including the initial particle location, the hydrophilicity and the size of colloidal templates, the oil phase solvent and reserving time of emulsions after the addition of MF prepolymer, were further studied. Relatively uniform sized particle packed-droplets with an average diameter of 10 microm were obtained. The assembled SPS particles kept ordering and minimal conglutination after the preparation of composite microspheres, which allows of controlling the permeability from the interstices between the particles. Porous-mesh-structured MF composite layer was formed to further control the permeability. The morphology of emulsions and composite microspheres were characterized by optical microscopy, scanning and transmission electron microscopy.

References

Apr 24, 1999·Science·C A MorrisD R Rolison

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Citations

Dec 17, 2010·Angewandte Chemie·Zhongwei NiuQian Wang
Aug 26, 2006·Colloids and Surfaces. B, Biointerfaces·Hyuk Sang Yoo
May 17, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Asep Bayu Dani NandiyantoKikuo Okuyama
Nov 1, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Jian Li, Harald D H Stöver
Nov 6, 2018·Biomacromolecules·Jianrui ZhangBernhard V K J Schmidt

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