Smart secondary polyurethane dispersions

被引：11

作者：

Chen, Fei ^{[1
]}

Hehl, Judith ^{[1
]}

Su, Yu ^{[1
]}

Mattheis, Claudia ^{[1
]}

Greiner, Andreas ^{[2
]}

Agarwal, Seema ^{[1
,2
]}

机构：

[1] Univ Bayreuth, Bayreuth Ctr Colloids & Interfaces BZKG, D-95440 Bayreuth, Germany

[2] Univ Marburg, D-35032 Marburg, Germany

来源：

POLYMER INTERNATIONAL | 2013年 / 62卷 / 12期

关键词：

polyurethane; antibacterial; dispersion; UCST; thermoresponsive; DRUG RELEASE; BEHAVIOR; TEMPERATURE; POLYMERS;

D O I：

10.1002/pi.4481

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Secondary dispersions of cationic segmented polyurethanes (PUs) with thermoresponsivity (upper critical solution temperature (UCST) in water), high solid contents and antibacterial properties are highlighted in this paper. PUs were prepared by polyaddition reactions and subsequent quaternization with methyl iodide. No additional stabilizers, organic solvents or special procedures were required to obtain stable aqueous dispersions containing up to 10wt% PU; in contrast, stable dispersions were straightforwardly accessed by a combination of UCST behavior and repulsive electrostatic forces among the positively charged segments, which meets the requirements of a green chemistry process. Particle size and UCST strongly depended on the solid content of the dispersions and the content of poly(ethylene glycol) segments in the copolymers. The dispersions exhibited fast-acting antibacterial properties against Escherichia coli. (c) 2013 Society of Chemical Industry

引用

页码：1750 / 1757

页数：8

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