| 磁性高强度聚丙烯酰胺/Fe3O4纳米复合水凝胶 |
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| 引用本文： | 相梅,贺昌城,汪辉亮.磁性高强度聚丙烯酰胺/Fe3O4纳米复合水凝胶[J].物理化学学报,2011,27(5):1267-1272. |
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| 作者姓名： | 相梅 贺昌城 汪辉亮 |
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| 作者单位： | College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China |
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| 基金项目： | 国家自然科学基金，北京市有机化学重点学科资助项目 |
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| 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.
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| 关 键 词： | 水凝胶 Fe3O4 磁性 机械强度 |
| 收稿时间： | 2010-10-20 |
| 修稿时间： | 2011-03-14 |
Magnetic Polyacrylamide/Fe3O4 Nanocomposite Hydrogel with High Mechanical Strength |
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| XIANG Mei,HE Chang-Cheng,WANG Hui-Liang.Magnetic Polyacrylamide/Fe3O4 Nanocomposite Hydrogel with High Mechanical Strength[J].Acta Physico-Chimica Sinica,2011,27(5):1267-1272. |
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| Authors: | XIANG Mei HE Chang-Cheng WANG Hui-Liang |
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| Institution: | College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China |
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| 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... |
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| Keywords: | Fe3O4 |
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