交联嵌段磺化聚芳醚砜质子交换膜的制备及性能.doc


交联嵌段磺化聚芳醚砜质子交换膜的制备
及性能#
唐卫芬,凌瑛,陈珊珊,胡朝霞,陈守文**
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(南京理工大学环境与生物工程学院,南京 210094)
摘要:为了提高磺化聚芳醚砜(SPAES)质子交换膜的质子导电率及稳定性,制备了一系列
交联嵌段 SPAES 质子交换膜(cbSPAES)。采用嵌段共聚工艺合成嵌段聚合物,然后在 P2O5
存在下利用磺酸基团与聚合物主链上活泼氢的脱水反应进行交联改性。采用电化学阻抗谱技
术测定 cbSPAES 膜的质子导电率、通过测试水中膜平面及厚度方向的尺寸变化率评价膜的
尺寸稳定性、通过加速老化试验评价膜的水解稳定性。结果表明:与 SPAES 膜相比,cbSPAES
膜的尺寸稳定性及水解稳定性明显提高;交联程度相同时,cbSPAES 膜的吸水率和质子电
导率随着磺化链段长度的增加呈上升的趋势。如 cbSPAES(30/10)-10 膜在 60℃水中的吸水率
为 65%,平面方向和厚度方向的尺寸变化率分别为 和 ,质子导电率为 163 mS/cm。
关键词:高分子化学;质子交换膜;磺化聚芳醚砜;嵌段;交联
中图分类号:
Synthesis and properties of proton exchange membranes
based oncross-linked block sulfonated poly(arylene ether
sulfone)s
TANG Weifen, LING Ying, CHEN Shanshan, HU Zhaoxia, CHEN Shouwen
(School of Environmental and Biological Engineering,Nanjing University of Science and
Technology,Nanjing 210094)
Abstract: In order to improve the proton conductivity and stability of proton exchange membranes
based on sulfonated poly(arylene ether sulfone) (SPAES), a series of cross-linked block SPAES
membranes (cbSPAES) were prepared. The block SPAES copolymers were synthesized through block
copolymerization and subsequently subjected to cross-linking modification in the presence of P2O5,
where the cross-linking reaction taken place between –SO3H groups and active hydrogen atoms
attached to the polymer backbones. Proton conductivity of the cbSPAES membr