取向增强抗CO2腐蚀纤维薄膜的制备及其性能

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取向增强抗CO₂腐蚀纤维薄膜的制备及其性能

Preparation and properties of orientation reinforced CO₂ corrosion resistant fiber membrane

取向增强抗CO₂腐蚀纤维薄膜的制备及其性能

Preparation and properties of orientation reinforced CO₂ corrosion resistant fiber membrane

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doi:10.13475/j.fzxb.20231003001

纺织学报 ›› 2024, Vol. 45 ›› Issue (12): 33-40.doi: 10.13475/j.fzxb.20231003001

卢海龙¹, 于影²(), 左雨欣³, 王浩然¹, 陈洪立¹, 汝欣¹

1.浙江理工大学机械工程学院, 浙江杭州 310018
2.嘉兴大学信息科学与工程学院,浙江嘉兴 314001
3.嘉兴南湖学院, 浙江嘉兴 314001

收稿日期:2023-10-10 修回日期:2024-03-06 出版日期:2024-12-15 发布日期:2024-12-31
通讯作者: 于影(1988—),女,副教授,博士。主要研究方向为功能化纤维材料制备与柔性电子器件。E-mail:yingyu@zjxu.edu.cn。
作者简介:卢海龙(2000—),男,硕士生。主要研究方向为功能纤维的制备。
基金资助:
国家自然科学基金项目(52305059);浙江省自然科学基金项目(LGG21E050021);嘉兴市应用性基础研究专项项目(2020AY10015);嘉兴市应用性基础研究专项项目(2020AD10015);嘉兴市应用性基础研究专项项目(2021AY30020)

LU Hailong¹, YU Ying²(), ZUO Yuxin³, WANG Haoran¹, CHEN Hongli¹, RU Xin¹

1. School of Mechanical Engineering, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
2. College of Information Science and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, China
3. Jiaxing Nanhu University, Jiaxing, Zhejiang 314001, China

Received:2023-10-10 Revised:2024-03-06 Published:2024-12-15 Online:2024-12-31

摘要：

针对柔性金属空气电池阴极腐蚀问题,采用静电纺丝技术在不同滚筒转速条件下制备了4组聚乙烯亚胺(PEI)/聚丙烯腈(PAN)复合纤维薄膜。采用傅里叶变换红外光谱仪、X射线衍射仪、扫描电子显微镜、比表面积和孔径分析仪、同步热分析仪和柔性电子器件综合测试平台等对复合纤维薄膜的物理特性、CO₂吸附性能及力学性能进行表征。结果表明:静电纺丝制备的PEI/PAN复合纤维薄膜的纤维表面较粗糙,存在沟壑、褶皱和微孔等形貌结构;当接收滚筒转速在1 500 r/min时,PEI/PAN复合纤维薄膜中纤维排列较规整,结晶度高,取向性显著;相比接收滚筒转速为500 r/min时制备的随机取向的纤维薄膜,接收滚筒转速为1 500 r/m时制备的高取向纤维薄膜的比表面积增大了82.29%,CO₂吸附性能提升了62.06%,纵向拉伸断裂强度增强了178.57%。本研究通过取向增强获得了兼具抗CO₂腐蚀性能和优异力学性能的静电纺丝柔性金属空气电池阴极隔膜,为柔性金属空气电池阴极抗CO₂腐蚀薄膜的制备工艺方法提供参考。

关键词: 取向纳米纤维膜, 静电纺丝, CO₂吸附, 力学性能, 电池隔膜材料

Abstract:

Objective CO₂ corrosion of the cathode in flexible metal-air batteries severely reduces its electrochemical performance and greatly hinders the further development of flexible metal-air batteries. Existing research shows that the amino functional group in PEI has strong adsorption capacity for CO₂. By increasing the orientation of the fiber membrane, the specific surface area and pore volume of the fiber membrane can be increased, thereby enhancing the adsorption capacity of the fiber membrane. A high degree of orientation can also enhance the mechanical properties of the membrane to a certain extent. However, there are few studies on cathode separators for flexible metal-air batteries offering both excellent CO₂ adsorption capacity and good mechanical properties. As such, this study aims to use electrospinning technology to prepare highly oriented Polyethyleneimine(PEI)/polyacryloni-trile(PAN) composite fiber membrane by adjusting the drum speed, and to characterize its physical properties, mechanical properties and CO₂ adsorption properties.

Method Four different groups of PEI/PAN composite fiber membranes were prepared at the drum rotation speeds of 500, 1 000, 1 500 and 2 000 r/min respectively. Fourier transform infrared spectroscopy, X-ray diffractometer, Scanning electron microscopy, and a flexible electronic comprehensive test platform were used to characterize the physical properties and mechanical properties of the composite fiber membranes. The CO₂ adsorption performance of the composite fiber membranes was characterized by a specific surface area and pore size analyzer and a simultaneous thermal analyzer, and the influence of orientation on the CO₂ adsorption capacity and mechanical properties of the PEI/PAN composite fiber membrane was explored.

Results The results of infrared spectroscopy and scanning electron microscopy show that the PEI/PAN composite fiber membrane was successfully prepared by electrospinning, and as the drum speed increases, the fiber diameter decreases. The rotation speed of the drum greatly affected the orientation of the fibers. When the rotation speed was 1 500 r/min, the orientation of the fibers seemed the best. The high degree of orientation obtained by increasing the rotation speed of the drum can obtain a larger specific surface area and pore volume of the PEI/PAN composite fiber membrane, thus improving its ability to adsorb CO₂. This is mainly due to the smaller fiber diameter and the larger gap formed by fiber stacking between the non-oriented and oriented directions. The increase in fiber orientation also enhances the crystallinity of fibers, which greatly affects their mechanical properties. High orientation caused increase the tensile breaking strength and Young's modulus of the fibers in the longitudinal direction. This is mainly because the nanofibers arew able to withstand greater tensile stress when they are aligned.

Conclusion The PEI/PAN composite fiber membrane prepared by electrospinning at 1 500 r/min has excellent orientation. Compared with the randomly oriented composite fiber membrane prepared by electrospinning at 500 r/min, the CO₂ adsorption capacity of the prepared membrane is increased by 62.06%, the longitudinal tensile breaking strength is enhanced by 178.57%, and the Young's modulus is enhanced by 245.3%. The research reported in this article provides a reference for the preparation of cathode anti-CO₂ corrosion membranes for flexible metal-air batteries.

Key words: oriented nanofiber membrane, electrospinning, CO₂ adsorption, mechanical property, battery diaphragm material

中图分类号:

TQ152

卢海龙, 于影, 左雨欣, 王浩然, 陈洪立, 汝欣. 取向增强抗CO₂腐蚀纤维薄膜的制备及其性能[J]. 纺织学报, 2024, 45(12): 33-40.

LU Hailong, YU Ying, ZUO Yuxin, WANG Haoran, CHEN Hongli, RU Xin. Preparation and properties of orientation reinforced CO₂ corrosion resistant fiber membrane[J]. Journal of Textile Research, 2024, 45(12): 33-40.

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链接本文: http://www.fzxb.org.cn/CN/10.13475/j.fzxb.20231003001

http://www.fzxb.org.cn/CN/Y2024/V45/I12/33

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样品编号	比表面积/ (m²·g^-1)	累计孔体积/ (cm³·g^-1)
P/P-r500	3.762	0.005 097
P/P-r1000	5.974	0.007 534
P/P-r1500	6.858	0.008 943
P/P-r2000	6.258	0.008 262

样品	拉伸断裂强度/ MPa	断裂伸长率/ %	弹性模量/ MPa
P/P-r500	2.8±0.1	27.4±0.1	10.22
P/P-r1000	4.0±0.1	25.3±0.1	15.81
P/P-r1500	7.8±0.1	22.1±0.1	35.29
P/P-r2000	6.2±0.1	23.4±0.1	26.49

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