Effect of carbon fiber surface functionality on the moisture absorption behavior of carbon fiber/epoxy resin composites

被引：49
作者：
Qian, X. [1 ]
Zhang, Y. G. [1 ]
Wang, X. F. [1 ]
Heng, Y. J. [1 ]
Zhi, J. H. [1 ]
机构：
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Natl Engn Lab Carbon Fiber Preparat Technol, Ningbo 315201, Zhejiang, Peoples R China
来源：
SURFACE AND INTERFACE ANALYSIS | 2016年 / 48卷 / 12期
基金：
中国国家自然科学基金;
关键词：
carbon fiber; chemistry; epoxy resin; composites; interface; INTERLAMINAR SHEAR-STRENGTH; WATER-ABSORPTION; ELECTROCHEMICAL OXIDATION; BISMALEIMIDE RESIN; MATRIX COMPOSITES; EPOXY COMPOSITES; GLASS; XPS; TEMPERATURE; INTERFACE;
D O I：
10.1002/sia.6031
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polyacrylonitrile (PAN)-based carbon fibers were electrochemically oxidized in aqueous ammonium bicarbonate with increasing current density. The electrochemical treatment led to significant changes of surface physical properties and chemical structures. The oxidized fibers showed much cleaner surfaces and increased levels of oxygen functionalities. However, it was found that there was no correlation between surface roughness and the fiber/resin bond strength, i.e. mechanical interlocking did not play a major role in fiber/resin adhesion. Increases in surface chemical functionality resulted in improved fiber/resin bonding and increased interlaminar shear strength (ILSS) of carbon fiber reinforced epoxy composites. The relationship between fiber surface functionality and the hydrothermal aging behavior of carbon fiber/epoxy composites was investigated. The existence of free volume resulted from poor wetting of carbon fibers by the epoxy matrix and the interfacial chemical structure were the governing factors in the moisture absorption process of carbon fiber/epoxy composites. Copyright (c) 2016 John Wiley & Sons, Ltd.
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收藏
页码：1271 / 1277
页数：7
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