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聚酰胺酸可控合成及其在质子交换膜的应用

作者：董玥，张英杰，董霄，王金可，罗琛

单位：中国石油天然气股份有限公司石油化工研究院，北京 102206

关键词：聚酰胺酸；可控制备；静电纺丝；质子交换膜

DOI号： 10.16159/j.cnki.issn1007-8924.2025.04.019

分类号： TQ323.6

出版年,卷(期):页码： 2025,45(4):182-193

摘要：

以磺化聚醚醚酮（SPEEK）为代表的非氟类磺酸质子交换膜，因低成本、耐热性等优势成为研究热点，但其电导率、稳定性和耐久性难以协同优化。聚酰亚胺（PI）凭借高力学强度与化学稳定性，成为SPEEK复合改性的理想材料。本研究围绕 SPEEK 性能提升，在聚酰胺酸（PAA）可控合成、PI纳米纤维膜制备、PI/SPEEK/PI三明治结构复合质子交换膜研究三个方面展开工作，成功探索了PAA溶液和PI纤维膜的制备工艺，显著提升了复合膜的质子传导性能。分子模拟表明，PI酰胺键与SPEEK磺酸根的氢键作用是界面优化的关键。本研究为非氟质子交换膜的高性能化提供了新路径。

Non-fluorinated sulfonic acid proton exchange membranes represented by sulfonated polyether ether ketone (SPEEK) have become a research hotspot due to their advantages such as low cost and excellent heat resistance. However, it is difficult to synergistically optimize their ionic conductivity, stability and durability. With its high mechanical strength and chemical stability, polyimide (PI) has become an ideal material for the composite modification of SPEEK. This work was carried out in three aspects: the controllable synthesis of polyamic acid (PAA), the preparation of PI nanofiber membranes, and the research on the composite proton exchange membranes with a PI/SPEEK/PI sandwich structure. The preparation processes of the PAA solution and the PI fiber membrane have been successfully explored, and the proton conduction performance of the composite membrane has been significantly improved. Molecular simulation results indicated that the hydrogen bonding interaction between the amide bond of PI and the sulfonate group of SPEEK was the keypoint to interface optimization. This study provides a new path for improving the performance of non-fluorinated proton exchange membranes.

基金项目：

作者简介：

董玥（1993-），女，山东济南人，三级工程师，工学博士，主要研究方向为聚合物制备与加工

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