pH-responsive flocculation and dispersion behavior of Janus particles in water

被引：8
|
作者：
Ito, Masanori [1 ]
Enomoto, Ryusuke [1 ]
Osawa, Kazuki [1 ]
Daiko, Yusuke [1 ]
Yazawa, Tetsuo [1 ]
Fujii, Syuji [2 ]
Yokoyama, Yuichi [2 ]
Miyanari, Yuki [2 ]
Nakamura, Yoshinobu [2 ]
Nakao, Aiko [3 ]
Iwasaki, Yasuhiko [4 ]
Yusa, Shin-ichi [1 ]
机构：
[1] Univ Hyogo, Dept Mat Sci & Chem, Himeji, Hyogo 6712280, Japan
[2] Osaka Inst Technol, Dept Appl Chem, Asahi Ku, Osaka 535, Japan
[3] RIKEN, Beam Applicat Team, Discovery Res Inst, Wako, Saitama, Japan
[4] Kansai Univ, Dept Chem & Mat Engn, Fac Chem Mat & Bioengn, Suita, Osaka, Japan
来源：
POLYMER JOURNAL | 2012年 / 44卷 / 02期
关键词：
controlled radical polymerization; graft; Janus particles; pH-responsive polymer; POLYMERIZATION; NANOPARTICLES; FABRICATION; EVAPORATION; ANISOTROPY; POLYMERS; CLUSTERS; DESIGN;
D O I：
10.1038/pj.2011.94
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Gold was vacuum-deposited on one side of 6-mu m-diameter SiO2 particles to prepare Janus particles (JPs). A thiol-terminated pH-responsive polymer (pAaH-SH), prepared via reversible addition-fragmentation chain transfer (RAFT) -controlled radical polymerization, was immobilized on the gold surface of the JPs as confirmed by attenuated total reflection-Fourier transform infrared and X-ray photoelectron spectroscopy measurement techniques. A fluorescein-labeled polymer (p(AaH/Flu)-SH) was also prepared via RAFT, and immobilization of p(AaH/Flu)-SH only on the gold surface of the JPs was confirmed by fluorescence microscopy observations. The flocculation and dispersion behavior of pAaH-SH-grafted JPs was observed with an optical microscope and was found to be varied with the solution pH. Polymer Journal (2012) 44, 181-188; doi:10.1038/pj.2011.94; published online 2 November 2011
引用
收藏
页码：181 / 188
页数：8
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