物理化学学报 >> 2011, Vol. 27 >> Issue (05): 1267-1272.doi: 10.3866/PKU.WHXB20110429

材料物理化学 上一篇    

磁性高强度聚丙烯酰胺/Fe3O4纳米复合水凝胶

相梅, 贺昌城, 汪辉亮   

  1. 北京师范大学化学学院, 北京 100875
  • 收稿日期:2010-10-20 修回日期:2011-01-03 发布日期:2011-04-28
  • 通讯作者: 贺昌城 E-mail:plaschem@163.com
  • 基金资助:

    国家自然科学基金(50673013)及北京市有机化学重点学科资助项目

Magnetic Polyacrylamide/Fe3O4 Nanocomposite Hydrogel with High Mechanical Strength

XIANG Mei, HE Chang-Cheng, WANG Hui-Liang   

  1. College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
  • Received:2010-10-20 Revised:2011-01-03 Published:2011-04-28
  • Contact: HE Chang-Cheng E-mail:plaschem@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50673013) and Beijing Municipal Commission of Education,China.

摘要:

以辐射过氧化的表面活性剂胶束为引发中心和交联中心, 制得具有优异机械性能的聚丙烯酰胺(PAAm)水凝胶, 并通过原位化学共沉淀法向其中引入Fe3O4粒子, 得到了磁性复合水凝胶. 扫描电子显微镜(SEM)表征发现磁性粒子在凝胶中分布均匀, 其粒径约为30 nm. X射线衍射(XRD)表征证实所引入的纳米粒子为尖晶石型Fe3O4. 磁性能测试表明, PAAm/ Fe3O4复合水凝胶具有超顺磁性特征. 该复合凝胶具有较优异的机械性能, 其断裂伸长率可以达到1200%, 拉伸强度最大可达0.10 MPa. 另外, 该复合凝胶表现出良好的形变回复特性.

关键词: 水凝胶, Fe3O4, 磁性, 机械强度

Abstract:

Polyacrylamide (PAAm) hydrogels with very high mechanical strength were prepared using radiation-peroxidized micelles that were formed by surfactant molecules as initiating and crosslinking centers. PAAm/Fe3O4 nanocomposite hydrogels were obtained by introducing Fe3O4 nanoparticles into PAAm hydrogels through an in situ chemical co-precipitation method. Scanning electron microscopy (SEM) investigations showed that the nanoparticles were homogeneously distributed and the particles were about 30 nm in size. X-ray diffraction (XRD) analysis showed that the obtained nanoparticles were spinel Fe3O4. The PAAm/Fe3O4 nanocomposite hydrogels showed superparamagnetism. The ferrogels also had good mechanical properties, the elongation at break of some gels could be as high as 1200% and the maximum tensile strength was about 0.10 MPa, and they exhibited very good shape recoverability.

Key words: Hydrogel, Fe3O4, Magnetism, Mechanical strength

MSC2000: 

  • O645