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

页码：181 / 188

页数：8

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