期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 69, 期 -, 页码 132-138出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2014.11.015
关键词
Carbon fibers; Nano-structures; Mechanical properties; Fiber/matrix bond
资金
- DAPA
- ADD
- Korea Science and Engineering Foundation (KOSEF) Grant - Korean government (MEST) through the Intelligent Textile System Research Center (ITRC) [R11-2005-065]
Carbon nanotube (CNT)-grafted carbon fibers (CFs) have emerged as new reinforcements for improving the mechanical properties of CF-reinforced composites but such enhancement in macroscale composites has not been realized. This paper reports a facile method for preparing CNT-grafted CFs and improving the tensile strength of their composites. A CNT/polyacrylonitrile solution was sprayed onto the surface of the CF woven fabrics, and the CNTs were grafted by a thermal treatment at 300 C. CNT-grafted CF composites were fabricated using the CNT-grafted CF woven fabrics using a vacuum-assisted resin transfer molding process with epoxy resin. The CNT-grafted CF composite exhibited 22% enhancement in the tensile strength compared to that of the pristine CF composite. Fracture surfaces of the CNT-grafted CF composites showed that the grafted CNTs obstructed the propagation of micro-cracks and micro-delamination around the CFs and also yarn boundaries, resulting in improved tensile strength of CNT-grafted CF composites. (C) 2014 Elsevier Ltd. All rights reserved.
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