Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (5): 864.

• Letters • Previous Articles     Next Articles

Janus Particles Prepared by Pickering Emulsion Template

WANG Chao-Yang*, YANG Rui, CHEN Yun-Hua, TONG Zhen   

  1. Research Institute of Materials Science, South China University of Technology, Guangzhou 510640, China
  • Received:2009-11-16 Online:2010-05-10 Published:2010-05-10
  • Contact: WANG Chao-Yang. E-mail: zhywang@scut.edu.cn
  • Supported by:

    国家自然科学基金(批准号: 20874030, 50973034)和中央高校基本科研业务费专项资金(批准号: 2009ZZ0036)资助.

Abstract:

“Semi-decoration” of silica particles(so-called Janus particles) with polydimethylamino ethylmethacrylate(PDMAEMA) grafts was carried out using surface-initiated atom transfer radical polymerization(SI-ATRP) based on Pickering emulsion template. ATRP initiator-immobilized silica particles assembled at the interfaces of paraffin oil-in-water emulsions and an ultimately stable Pickering emulsion was formed. SI-ATRP of water-soluble monomer DMAEMA was conducted in the water phase of the Pickering emulsion from the outer side of silica nanoparticles. Janus particles were obtained. Ag nanoparticles absorbed onto the PDMAEMA region of silica particles could be observed by transmission electron microscopy(TEM) image which indicated that Janus particles were successfully prepared. The semi-decoration by SI-ATRP based on Pickering emulsion technique offers a new route to designing Janus particles.

Key words: Atom transfer radical polymerization(ATRP); Pickering emulsion; Janus particle

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