Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 99, Issue -, Pages 58-64Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2017.04.003
Keywords
Carbon fiber; Grafting; Interfacial strength; Poly(oxypropylene) diamines
Funding
- Chang Jiang Scholars Program
- National Natural Science Foundation of China [51073047]
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We report on a green method of using poly(oxypropylene) diamines (D-400) as coupling and curing agent to functionalize carbon fiber in water. We propose to enhance the interfacial properties of carbon fiber composites, together with the tensile strength of carbon fibers. The microstructure and mechanical properties of carbon fibers before and after modification are investigated. The results show that D-400 do not change the surface morphology, but significantly increase the polarity, wettability and roughness of the carbon fiber surface. The interfacial shear strength (IFSS) of modified carbon fiber/epoxy composite and the tensile strength of carbon fibers increase by 79.1% and 8.2%, respectively. It is believed that D-400 can effectively improve the interfacial adhesion of the composites by improving resin wettability, increasing chemical bonding and mechanical interlocking. This green and simple method can have applications in continuous production of high-performance carbon fiber composites. (C) 2017 Elsevier Ltd. All rights reserved.
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