纺织学报 ›› 2020, Vol. 41 ›› Issue (11): 19-26.doi: 10.13475/j.fzxb.20200302108

• 纤维材料 • 上一篇    下一篇

磺化聚醚砜纳米纤维复合质子交换膜的制备及其性能

王利媛1,2, 康卫民1,2, 庄旭品1,2, 鞠敬鸽1,2, 程博闻1,2()   

  1. 1.天津工业大学 纺织科学与工程学院, 天津 300387
    2.天津工业大学 分离膜与膜过程国家重点实验室, 天津 300387
  • 收稿日期:2020-03-09 修回日期:2020-08-14 出版日期:2020-11-15 发布日期:2020-11-26
  • 通讯作者: 程博闻
  • 作者简介:王利媛(1990—),女,博士生。主要研究方向为纳米纤维复合质子交换膜。
  • 基金资助:
    国家自然科学基金项目(51873152);天津市科技计划项目(19PTSYJC00010)

Preparation and properties of composite proton exchange membranes based on sulfonated polyethersulfone nanofibers

WANG Liyuan1,2, KANG Weimin1,2, ZHUANG Xupin1,2, JU Jingge1,2, CHENG Bowen1,2()   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. State Key Laboratory of Separation Membrane and Membrane Process, Tiangong University, Tianjin 300387, China
  • Received:2020-03-09 Revised:2020-08-14 Online:2020-11-15 Published:2020-11-26
  • Contact: CHENG Bowen

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摘要：

为开发燃料电池用高性能全氟磺酸(Nafion)质子交换膜,采用静电纺丝技术制备不同磺化度的磺化聚醚砜(SPES)纳米纤维,将其作为添加剂引入Nafion基体中,制备SPES纳米纤维/Nafion复合质子交换膜。探讨纺丝液浓度、纺丝电压、接收距离对SPES纳米纤维纺丝过程及纤维形貌的影响。在最优纺丝工艺下,着重研究不同磺化度SPES纳米纤维对复合膜微观结构、吸水率、溶胀率、质子传导率及甲醇渗透率等性能的影响。结果表明:在SPES质量分数为30%,纺丝电压为30 kV,接收距离为20 cm条件下制得磺化度为64%的SPES纳米纤维,将其作为添加剂构筑得到复合Nafion质子交换膜,该膜具有平衡的质子传导(0.144 S/cm)与甲醇渗透性(7.58×10-7 cm2/s),综合性能最佳,满足高性能甲醇燃料电池的应用需求。

关键词: 质子交换膜, 静电纺丝, 磺化聚醚砜, 纳米纤维, 质子传导率, 燃料电池

Abstract:

To develop high-performance Nafion proton exchange membranes for fuel cells, sulfonated polyethersulfone (SPES) nanofibers with different sulfonation degrees prepared via electrospinning technology were used as additives to construct SPES nanofibers/Nafion composite proton exchange membrane. The effects of solution concentration, spinning voltage and receiving distance on the spinning process and morphology of SPES nanofibers were discussed. Under the optimal process, the effects of SPES nanofibers with different sulfonation degrees on the microstructure, water absorption, swelling, proton conductivity, and methanol permeability of the composite membrane were studied. The results show that under the electrospinning parameters of solution concentration of 30%, spinning voltage of 30 kV and receiving distance of 20 cm, the composite Nafion membrane based on the optimal SPES nanofiber with sulfonation degree of 64% exhibits balanced proton conduction (0.144 S/cm) and methanol permeability (7.58×10-7 cm2/s). The composite membrane presents the best comprehensive performance, which meets the application needs of high-performance methanol fuel cells.

Key words: proton exchange membrane, electrospinning, sulfonated polyethersulfone, nanofiber, proton conductivity, fuel cell

中图分类号: 

  • TM911.48

图1

不同纺丝液质量分数SPES纳米纤维扫描电镜照片(×10 000)及其对应纤维直径分布图"

图2

不同纺丝电压下SPES纳米纤维扫描电镜照片(×10 000)及其对应纤维直径分布图"

图3

不同纺丝接收距离SPES纳米纤维扫描电镜照片(×10 000)及其对应纤维直径分布图"

图4

不同磺化度SPES纳米纤维扫描电镜照片(×10 000)及其对应纤维直径分布图"

图5

不同磺化度SPES/Nafion复合质子交换膜表面SEM照片(×2 000)"

图6

不同磺化度SPES/Nafion复合质子交换膜在40和80 ℃时的吸水率和溶胀率"

图7

不同磺化度SPES/Nafion复合膜的应力-应变曲线"

图8

不同磺化度SPES/Nafion复合膜的质子传导率与温度的关系"

图9

不同磺化度SPES/Nafion复合膜在40 ℃时的质子传导率及甲醇渗透率"

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