Synthesis of PS/Ag asymmetric hybrid particles via phase separation and self-assembly--颗粒学报PARTICUOLOGY

Fan, X., Zhang, Q., Zhang, H., Zhang, B., Li, C., Li, X., & Lei, X. (2013). Synthesis of PS/Ag asymmetric hybrid particles via phase separation and self-assembly. Particuology, 11(6), 768–775. https://doi.org/10.1016/j.partic.2012.09.012

Synthesis of PS/Ag asymmetric hybrid particles via phase separation and self-assembly

Xinlong Fan, Qiuyu Zhang^*, Hepeng Zhang, Baoliang Zhang, Chunmei Li, Xiangjie Li, Xingfeng Lei

Key Laboratory of Applied Physics and Chemistry in Space of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi’an 710072, China

10.1016/j.partic.2012.09.012

Volume 11, Issue 6, December 2013, Pages 768-775

Received 7 June 2012, Revised 18 September 2012, Accepted 26 September 2012, Available online 22 April 2013.

E-mail: qyzhang1803@gmail.com

Highlights

• A facile method was used to prepare polystyrene/Ag asymmetric hybrid particles.

• The synthesis consisted of phase separation, functionalization and self-assembly.

• Ag was asymmetrically distributed on the surface of particles.

Abstract

This article presents a facile approach to preparation of polystyrene/silver (PS/Ag) asymmetric hybrid particles. In this method, polystyrene/polyglycidyl methacrylate (PS/PGMA) Janus particles were synthesized via internal phase separation triggered by evaporation of dichloromethane (DCM) from PS/PGMA/DCM-in water emulsion droplets. Then, the Janus particles were aminated and sequentially carboxylated to obtain PS/PGMA-NH₂ and PS/PGMA-COOH particles. Ag⁺ self-assembled on the surface of PGMA hemisphere of the functionalized PS/PGMA particles by coordinating with amine/carboxyl. PS/Ag asymmetric hybrid particles with 7.29 wt% of Ag were obtained by reduction of Ag⁺. Scanning electron microscopy, energy-dispersive X-ray spectroscopy and transmission electron microscopy results confirmed that Ag was asymmetrically distributed on the surface of polymer particles.

Graphical abstract

Keywords

Phase separationInterfacial interaction; Amination; Carboxylation; Coordination; Self-assembly

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