物理化学学报 >> 1999, Vol. 15 >> Issue (08): 704-708.doi: 10.3866/PKU.WHXB19990808

研究论文 上一篇    下一篇

聚合物-锂改性蒙脱石复合材料离子迁移

陈文, 徐庆, 袁润章, 任海兰, 岳勇, 叶朝辉   

  1. 武汉工业大学材料科学与工程学院,材料复合新技术国家重点实验室,武汉 430070|中国科学院武汉物理与数学研究所,武汉 430072
  • 收稿日期:1998-09-28 修回日期:1998-12-28 发布日期:1999-08-15
  • 通讯作者: 陈文

Study on the lonic Transport of Polymer-Lithium Exchanged Montmorlillonite Composites

Chen Wen, Xu Qing, Yuan Run-Zhang, Ren Hai-Lan, Yue Yong, Ye Chao-Hui   

  1. Institute of Materials Science Engineering,State Key Laboratory of Advanced Techology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070|Wuhan Physics and Mathematics Institute,Chinese Academy of Science,Wuhan 430072
  • Received:1998-09-28 Revised:1998-12-28 Published:1999-08-15
  • Contact: Chen Wen

摘要:

以聚合物(PEO,PEO-PMMA)和锂改性蒙脱石作为主要原料,采用聚合物粉末直接熔融嵌入的方法,制备聚合物-蒙脱石复合材料.利用NMR、AC阻抗等分析方法探讨了复合材料中聚合物链对 Li+离子迁移的影响.结果表明,聚合物(PEO)嵌入蒙脱石层间,层间聚合物链的无序度增大,有利于Li+离子迁移.PMMA引入对PEO链的改性,进一步加大聚合物链的无序度,更易于层间Li+离子迁移;复合材料的常温离子电导率接近10-2S•cm-1,且具有良好的温度稳定性.

关键词: 聚合物, 嵌入, 蒙脱石, 离子迁移

Abstract:

The effects of polymer chains on Li + ionic transport were investigated using NMR, AC impedance in polymer-montmorillonite composites synthesized by melt intercalation of polymer in lithium-exchanged montmorillonite. The results show that the intercalation of polymer(PEO) in montmorillonite increases the random arrangement of polymer chains Which is beneficial to the mobility of interlayer Li + ions. PMMA intercalation and modification of PEO with PMMA bring about more random arrangement of polymer chains which are more beneficial to Li + ionic transport. The ionic conductivity of composites is about 10-3 S•cm-1 at room temperature and there is good temperature stability of electrical properties.

Key words: Polymer, Intercalation, Montmorillonite, Ionic transport