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聚离子液负载金纳米粒子水凝胶的制备及阴离子响应性

李军波*,韩晨,张世杰,周惠云   

  1. (河南科技大学化工与制药学院 洛阳 471003)
  • 收稿日期:2012-05-29 修回日期:2012-08-09 出版日期:2013-04-10 发布日期:2013-04-10
  • 通讯作者: 李军波，副教授; Tel/Fax:0379-64231915; E-mail:Li.junbo@yahoo.com.cn; 研究方向：智能响应性功能高分子
  • 基金资助:
    国家自然科学基金（51103035）资助项目

Preparation of Poly(ionic liquid) Hydrogel Containing Gold-nanoparticle and Its Anion Responsiveness

LI Junbo*, HAN Chen, ZHANG Shijie, ZHOU Huiyun   

  1. (College of Chemical Engineering & Pharmaceutics,Henan University of Science & Technology,Luoyang 471003,China)
  • Received:2012-05-29 Revised:2012-08-09 Published:2013-04-10 Online:2013-04-10

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摘要： 通过咪唑基离子液单体与二乙烯苯的自由基聚合制备了聚离子液水凝胶，并通过一步还原得到了离子液水凝胶负载金纳米粒子的复合材料。 用UV-Vis光谱和透射电子显微镜研究了金纳米粒子在离子液水凝胶内部的分散状态及阴离子响应性聚集。 结果表明，由于空间位阻和静电作用，制得的金纳米粒子的表面等离子共振吸收峰为527 nm，在离子液水凝胶中呈均匀分散的球形(2~5 nm)；在PF-6阴离子的作用下，形成了疏水性水凝胶，使凝胶收缩，凝胶内部的金纳米粒子发生聚集，其吸收峰红移到532 nm，初步证实了此水凝胶具有阴离子响应性。

关键词: 金纳米粒子, 离子液, 水凝胶, 阴离子响应

Abstract: Poly(ionic liquid) hydrogel was synthesized by radical polymerization of N-vinly-N′-ethylimidazolebromize and divinylbenzene, and then the hydrogel loading gold nanoparticles(GNPs) was obtained by one step in situ reduction. The dispersion of the gold nanoparticles in the poly(ionic liquid) hydrogel was studied, and the anion responsive aggregation was investigated by UV-Vis spectrum and TEM. It was found that the GNPs was well dispersed in the net of poly(ionic liquid) hydrogel with a spherical form(2~5 nm) and surface plasmon resonance(SPR) absorption peak at 527 nm due to the steric hindrance and electrostatic interactions. The hydrophobic hydrogel was formed due to the effect of PF-6, causing the contraction of the gel and the aggregation of the GNPs inside the gel. Consequently, the SPR absorption peak was shifted to 532 nm. The results indicate that this hydrogel has an anion responsiveness.

Key words: gold nanoparticles, Polymer ionic liquid, hydrogel, anion responsiveness

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