Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 169, Issue -, Pages 34-44Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2018.10.034
Keywords
Carbon fibers; Hybrid composites; Polymer-matrix composites (PMCs); Interfacial strength; Surface treatments
Categories
Funding
- Key Project of Chinese National Programs [2016YFB0101704]
- National Natural Science Foundation of China [51703232]
- Zhejiang Provincial Natural Science Foundation [LQ16E030001]
- Ningbo International Cooperation Project [2017D10025]
- Ningbo Key Industrial Project [2017B10007]
- Chinese Academy of Sciences and Technology Services Network Program
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The mechanical properties of carbon fiber (CF) reinforced composites are greatly dependent on the interfacial adhesion between fiber and resin matrix. Introducing nanoscale reinforcements into the interface is an effective approach to improve the interfacial adhesion of CF composites. In this paper, we proposed a facile and effective method for assembling poly(cyclotriphosphazene-co-4,4'-sulfonyldiphonel) nanotube onto CF surface as a novel multi-scale hybrid reinforcement through in situ template polymerization. The effects of surface modification on the surface and interface properties of CF and the resulting composite were investigated. After modification, the interfacial shear strength of fiber reinforced epoxy composites showed an increase of 26.4%. The reinforcing mechanisms were also analyzed, and the improvements on interfacial properties should mainly be attributed to mechanical interlocking effect. In addition, the modification even improved the fiber tensile strength by 6.6-16.3%, rather than deteriorating it.
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