Surface and core modification of carbon fibers
作者:
Yi-Ning Lee,
Shu-Min Chiao,
期刊:
Composite Interfaces
(Taylor Available online 1996)
卷期:
Volume 4,
issue 4
页码: 213-222
年代: 1996
DOI:10.1163/156855497X00172
出版商: Taylor & Francis Group
关键词: Carbon fiber;surface modification;dynamic contact angle;epoxy
数据来源: Taylor
摘要:
Thermal and thermochemical treatments with amines have been shown to improve both the mechanical strengths of carbon fibers and their interfacial bonding forces with polymer matrix. In this report, the wettabilities of the surface-treated carbon fibers were studied by dynamic contact angles with epoxy resin. Two mechanisms occur during the fiber modification processes, namely, the fiber core restructuring and surface etching. The former occurs at elevated temperature and increases the fiber strength significantly. When surface reaction occurs, the number of surface oxides increases to improve the surface wettabilities, which may be observed by the decreased dynamic contact angles. Accompanying the etch-cleaning effects, the fiber strength would also increase initially. Deeper penetration of amine would destroy the graphite crystallinity on fiber surfaces and lower the fiber strength.
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