Evolution of microstructure and properties of various types of PAN-based carbon fibers under the action of a mild electric field

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2025-02-13 DOI:10.1007/s42823-025-00871-0

Hongshuo Cao, Yanhong Tian, Jiangman Sun, Xuejun Zhang

引用次数: 0

Abstract

Electrochemical treatment has a significant effect on the properties of carbon fibers (CFs). In this study, the effect of mild electric field action on the microstructure and properties of polyacrylonitrile (PAN)-based high-modulus CFs (HMCFs) and high-strength CFs (HSCFs) was investigated. Under the action of a mild electric field, CFs did not show obvious defects, but their microstructure, mechanical properties and electrical properties were affected. For HMCFs, the graphitization degree in both axial and radial directions of the fibers had a decreasing trend, the grain spacing increased, and the grain size and degree of orientation decreased, which led to a decrease in the tensile strength, tensile modulus and axial conductivity. However, for HSCFs, the pattern of change was exactly opposite to that of HMCFs. The results of this study can provide useful guidance for optimizing the production process and surface modification of CFs.

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弱电场作用下不同类型聚丙烯腈基碳纤维的微观结构和性能演变

电化学处理对碳纤维的性能有显著影响。本文研究了弱电场作用对聚丙烯腈（PAN）基高模量碳纤维（HMCFs）和高强碳纤维（HSCFs）微观结构和性能的影响。在弱电场作用下，碳纤维没有表现出明显的缺陷，但其微观结构、力学性能和电学性能受到影响。对于HMCFs，纤维轴向和径向石墨化程度均呈减小趋势，晶粒间距增大，晶粒尺寸和取向度减小，导致拉伸强度、拉伸模量和轴向电导率下降。然而，对于HSCFs，变化模式与HMCFs完全相反。研究结果可为碳纤维的生产工艺优化和表面改性提供有益的指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.