化学学报 ›› 2011, Vol. 69 ›› Issue (04): 492-496. 上一篇    下一篇

研究简报

金纳米粒子杂化超分子水凝胶的制备与性能

赵三平*,曹孟杰,李利燕,徐卫林   

  1. (武汉纺织大学 新型纺织材料绿色加工及其功能化教育部重点实验室 武汉 430073)
  • 收稿日期:2010-06-20 修回日期:2010-08-17 出版日期:2011-02-28 发布日期:2010-10-17
  • 通讯作者: 赵三平 E-mail:zhaosanping@163.com
  • 基金资助:

    湖北省教育厅项目;国家重点基础研究发展规划项目

Preparation and Properties of Supramolecular Hydrogels Hybridized with Au Nanoparticles

ZHAO San-Ping, CAO Meng-Jie, LI Li-Yan, XU Wei-Lin   

  1. (Key Laboratory of Green Processing and Functional Textiles of New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan 430073)
  • Received:2010-06-20 Revised:2010-08-17 Online:2011-02-28 Published:2010-10-17
  • Contact: San-Ping ZHAO E-mail:zhaosanping@163.com

在制备水溶性硫辛酸酯封端的甲氧基聚乙二醇-聚己内酯嵌段共聚物(MPEG-PCL-ALA)单层包覆金纳米粒子的基础上, 在水溶液中, 利用α-环糊精(α-CD)与单层包覆金纳米粒子的包合作用构建杂化超分子水凝胶. 透射电子显微(TEM)照片显示, 金纳米粒子的尺寸为6~8 nm. X射线衍射测试表明, 所制备的水凝胶中含有α-环糊精与MPEG-PCL嵌段共聚物包合形成的多聚准轮烷的特征衍射峰(2θ=19.7°). 紫外-可见吸收光谱显示, 单层包覆金纳米粒子的水溶液及其与α-CD包合形成的水凝胶在525 nm处均出现表面等离子共振吸收峰, 单层包覆金纳米粒子溶液存放3个月后, 其表面等离子共振吸收峰未发生明显红移, 表明单层包覆金纳米粒子的水溶液具有较好的稳定性.

关键词: 单层包覆金纳米粒子, 环糊精, 包合作用, 超分子水凝胶, 表面等离子共振

On the basis of the preparation of water-soluble Au nanoparticles protected with methoxypolyethylene glycol-poly(ε-caprolactone) block copolymer end-capped with α-thioctate ester (MPEG-PCL- ALA), hybrid supramolecular hydrogels were fabricated by the inclusion complexation between MPEG-PCL monolayer-protected Au nanoparticles and α-cyclodextrin (α-CD) in aqueous solution. TEM photograph showed that the size of gold nanoparticles was about 6~8 nm. XRD results confirmed that there existed the characteristic peak (2θ=19.7°) of polypseudorotaxanes formed from MPEG-PCL block copolymer with α-CD in as-obtained hydrogels. UV-visible spectra displayed that the surface plasma resonance absorption peaks appeared at about 525 nm for both aqueous solution of monolayer-protected Au nanoparticle and its hydrogel with α-CD, and there is no shift of the surface plasma resonance absorption peak after three-month storage of its aqueous solution, showing a good colloidal stability.

Key words: monolayer-protected Au nanoparticle, cyclodextrin, inclusion complexation, supramolecular hydrogel, surface plasma resonance

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