单根碳纤维的电化学活性与损伤

Electrochemical Activity and Damage of Single Carbon Fiber.

作者信息

Chen Xiaodong, Zhang Chi, Song Guang-Ling, Zheng Dajiang, Guo Yang, Huang Xiaosong

机构信息

Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, 422th. Siming Rd, Xiamen 361005, China.

State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, 422th. Siming Rd, Xiamen 361005, China.

出版信息

Materials (Basel). 2021 Apr 2;14(7):1758. doi: 10.3390/ma14071758.

DOI:10.3390/ma14071758

PMID:33918487

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8038226/

Abstract

The electrochemical activity of a carbon fiber was characterized at different potentials in 3.5 wt.% NaCl solution, and the fiber cylindrical surface changed by polarization at different potentials was revealed by SEM, AFM, optical microscopy, FTIR spectroscopy, Raman spectroscopy, and XRD. The results showed that the carbon fiber exhibited different electrochemical activities at some polarization potentials; within a 3V potential range the anodic and cathodic polarization current densities stepped up by more than 5 orders of magnitude, and the carbon fiber (CF) surface dramatically changed with time. Strong anodic polarization appeared to facilitate the breakdown of C-C covalent bonds in the carbon fiber and enhance the amorphization of the fiber surface.

摘要

在3.5 wt.%的NaCl溶液中，对碳纤维在不同电位下的电化学活性进行了表征，并通过扫描电子显微镜（SEM）、原子力显微镜（AFM）、光学显微镜、傅里叶变换红外光谱（FTIR）、拉曼光谱和X射线衍射（XRD）揭示了在不同电位下极化导致的纤维圆柱表面变化。结果表明，碳纤维在某些极化电位下表现出不同的电化学活性；在3V的电位范围内，阳极和阴极极化电流密度跃升超过5个数量级，并且碳纤维（CF）表面随时间发生了显著变化。强阳极极化似乎有助于碳纤维中C-C共价键的断裂，并增强纤维表面的非晶化。