Synthesis of PS/Ag asymmetric hybrid particles via phase separation and self-assembly |
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| Authors: | Xinlong Fan Qiuyu Zhang Hepeng Zhang Baoliang Zhang Chunmei Li Xiangjie Li Xingfeng Lei |
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| Affiliation: | Key Laboratory of Applied Physics and Chemistry in Space of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi＇ an 710072, China |
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| 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. |
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| Keywords: | Phase separation Interracial interaction Amination Carboxylation Coordination Self-assembly |
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