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Thermo-responsive Hercosett / Poly(N-isopropylacrylamide) films: A new, fast, optically responsive coating
來源:王井研究員個人網(wǎng)站 發(fā)布日期:2014-01-23
作者:J. Wang, A. Sutti, X. Wang, T. Lin
關(guān)鍵字:Hydrogel, Nanofibres,Electrosinning
論文來源:期刊
具體來源:Journal of Colloid and Interface
發(fā)表時間:2012年
Poly(N-isopropylacrylamide) (PNIPAM) is a common thermo-responsive, water-soluble polymer, while Hercosett is a cationic resin commonly employed in the paper industry. In this paper, Hercosett? and poly(N-isopropylacrylamide) (PNIPAM) nanoparticles were used to prepare composite films that show thermo-responsive behavior and swelling–shrinking properties in water. First, size-controlled PNIPAM hydrogel nanoparticles were synthesized. These were then embedded within a matrix of the cationic resin Kymene 577H by film casting. The distribution of nanoparticles in the resin film was investigated. The thermo-responsive properties of the as-synthesized PNIPAM hydrogel nanoparticles and of the composite films were characterized together with the repeatability of the swelling–shrinking cycles. The presence of nanoparticles endowed the film with highly enhanced water retention (in comparison with resin-only films) and, most importantly, thermo-responsiveness. A very fast optical and morphological response was in fact observed. Due to the dual (optical and morphological) response, this new system is suitable for applications in optical or morphological actuation and gating.
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