Synthesis and Characterization of pH Sensitive Core-Shell-Corona Micelles of Poly(styrene-block-2-vinylpyridine-block-ethylene oxide) ABC Triblock Copolymer in Aqueous Solutions

被引：5

作者：

Bharatiya, Bhavesh ^{[1
]}

Yusa, Shin-Ichi ^{[2
]}

Aswal, Vinod ^{[3
]}

Abezgauz, Ludmila ^{[4
,5
]}

Danino, Dganit ^{[4
,5
]}

Bahadur, Pratap ^{[1
]}

机构：

[1] VNSG Univ, Dept Chem, Surat 395007, India

[2] Univ Hyogo, Dept Mat Sci & Chem, Himeji, Hyogo 6712280, Japan

[3] Bhabha Atom Res Ctr, SSPD, Bombay 400085, Maharashtra, India

[4] Technion Israel Inst Technol, Dept Biotechnol & Food Engn, IL-32000 Haifa, Israel

[5] Technion Israel Inst Technol, Russell Berrie Nanotechnol Inst, IL-32000 Haifa, Israel

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2011年 / 84卷 / 11期

基金：

以色列科学基金会;

关键词：

BLOCK-COPOLYMERS; ELECTRON-MICROSCOPY; CONFORMATIONAL TRANSITIONS; LIGHT-SCATTERING; MORPHOLOGY; POLY-2-VINYLPYRIDINE; NEUTRALIZATION; MICELLIZATION; DEPENDENCE; WATER;

D O I：

10.1246/bcsj.20110184

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The core-shell-corona forming ABC triblock copolymer poly(styrene-block-2-vinylpyridine-block-ethylene oxide), PS-P2VP-PEO, was synthesized using reversible addition fragmentation chain transfer (RAFT) radical polymerization and characterized by NMR and GPC as PS13-P2VP(62)-PEO47. The aggregation behavior in aqueous solution as a function of pH and temperature was studied. Turbidity measurements were used to monitor the effects associated with change in pH. The pH-sensitive P2VP block (insoluble above pH >5) and resultant protonation/deprotonation phenomenon plays decisive role in the aggregation. We found that spherical micelles of considerably low aggregation number form at pH <5. SANS and DLS characterization indicate the micelles' size and spherical shape remained virtually constant in the pH range 1 to 5. The size and shape were further confirmed by cryo-TEM.

引用

页码：1227 / 1233

页数：7

共 31 条

[31] Synthesis, pH- and temperature-induced micellization and gelation of doubly hydrophilic triblock copolymer of poly(N,N-dimethylamino-2-ethylmethacrylate)-b-poly(ethylene glycol)-b-poly(N,N-dimethylamino-2-ethylmethacrylate) in aqueous solutions
Peng, Zhiping
Li, Guangzhao
Liu, Xinxing
Tong, Zhen
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2008, 46 (17) : 5869 - 5878

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