Synthesis of silver-polystyrene nanocomposite particles using water in supercritical carbon dioxide medium and its antimicrobial activity

被引：30
作者：
Kamrupi, I. R. [1 ]
Phukon, P. [2 ]
Konwer, B. K. [2 ]
Dolui, S. K. [1 ]
机构：
[1] Tezpur Univ, Dept Chem Sci, Tezpur, Assam, India
[2] Tezpur Univ, Dept Mol Biol & Biotechnol, Tezpur, Assam, India
来源：
JOURNAL OF SUPERCRITICAL FLUIDS | 2011年 / 55卷 / 03期
关键词：
Supercritical carbon dioxide; Nanocomposites; Antimicrobial activity; DISPERSION; POLYMERIZATION; NANOPARTICLES;
D O I：
10.1016/j.supflu.2010.09.027
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel method based on ex situ dispersion of silver nanoparticles within the monomers and subsequent emulsion polymerization using water-in-sc-CO2 medium is introduced in this paper. Silver nanoparticles were synthesized by chemical reduction of silver nitrate using sodium borohydrate as a reducing agent and polydimethylsiloxane (PDMS) as a stabilizer in the water-in-sc-CO2 medium. The stable dispersion of silver nanoparticles was added slowly during the polymerization of styrene in the water-in-sc-CO2 maintaining the temperature at 70 degrees C and pressure at 20.68 MPa, respectively. The silver nanoparticles encapsulated within polymer particles were characterized by UV-visible spectroscopy, XRD, TGA, SEM and TEM. The silver/polystyrene nanocomposite particles exhibited antimicrobial activity against a number of bacteria. The current work represents a simple, reproducible and universal way to prepare a variety of metal-polymer nanocomposite particles. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1089 / 1094
页数：6
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