高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    

聚丙烯酸锂与1-丁基-3-甲基咪唑溴离子液体的阳离子交换反应

张晓萌1, 李君1, 刘正平2, 张丽新1   

    1. 北京师范大学化学学院高分子化学与物理研究所,
    2. 环境友好与功能高分子材料重点实验室, 北京 100875
  • 收稿日期:2008-05-14 修回日期:1900-01-01 出版日期:2009-03-10 发布日期:2009-03-10
  • 通讯作者: 李君, 刘正平

Cation Exchange Reaction of Poly(lithium acrylate) with 1-Butyl-3-methylimidazolium Bromide

ZHANG Xiao-Meng1, LI Jun1*, LIU Zheng-Ping2*, ZHANG Li-Xin1   

    1. Institute of Polymer Chemistry and Physics, College of Chemistry,
    2. BNU Key Lab of Environmentally Friendly and Functional Polymer Materials, Beijing Normal University, Beijing 100875, China
  • Received:2008-05-14 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10
  • Contact: LI Jun, LIU Zheng-Ping

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摘要： 通过聚丙烯酸锂(PAALi)与1-丁基-3-甲基咪唑溴(BmimBr)离子液体进行阳离子交换, 将1-丁基-3-甲基咪唑阳离子引入到聚丙烯酸锂结构中, 形成了丙烯酸锂(AALi)与1-丁基-3-甲基咪唑丙烯酸盐(BmimAA)离子液体的无规共聚物[P(AALi-BmimAA)]. 研究了反应时间、温度、投料比、反应物浓度及聚丙烯酸锂分子量等对离子交换程度的影响. 对不同离子交换程度时聚合物电导率的研究结果表明, 所有共聚物的电导率均比聚丙烯酸锂的有明显提高, 并且随着阳离子交换程度的增加, 电导率出现极值. 在聚丙烯酸锂的15%水溶液中, 当Bmim+与Li+的投料摩尔比为1∶1时, 在80 ℃下交换反应24 h, 得到的共聚物的Bmim+与Li+摩尔比为0.0387, 其电导率最高, 为1.44×10-8 S/cm, 比聚丙烯酸锂的电导率(1.06×10-11 S/cm)提高了3个数量级. 向此共聚物中掺杂LiTFSI, 电导率再次提高2个数量级, 最高可达2.90×10-6 S/cm.

关键词: 聚丙烯酸锂, 1-丁基-3-甲基咪唑溴, 无规共聚物, 阳离子交换反应, 离子电导率

Abstract: A new kind of conducting random copolymer of lithium acrylate with 1-butyl-3-methylimidazolium acrylate[P(AALi-BmimAA)] was prepared by the cation exchange reaction of PAALi with 1-butyl-3-methylimidazolium bromine ionic liquid. As a result, well-ordered structure of poly(lithium acrylate)(PAALi) was destroyed by introducing the 1-butyl-3-methylimidazolium cation and the formed copolymers had lower Tg and more than PAALi. Thus, the ionic conductivity of copolymer became higher than PAALi. The highest ionic conductivity of copolymer is 1.44×10-8 S/cm which is higher than that of PAALi in three orders of magnitude. After mixing with LiTFSI, the ionic conductivity of copolymer increased two orders of magnitude to 2.90×10-6 S/cm again.

Key words: PAALi, 1-Butyl-3-methylimidazolium bromine, Random copolymer, Cation exchange reaction, Ion conductivity

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