Journal
COMPOSITES PART B-ENGINEERING
Volume 247, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2022.110279
Keywords
Carbon fiber; Interface; Modulus gradient; Electrochemical grafting
Funding
- Aeronautical Science Foundation of China [2019ZF019007]
- Jiangsu Science and Technology Project [BE2019091]
- Sichuan Key Research and Development Program [22ZDYF3323, 22ZDYF3193]
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The interface of carbon fiber reinforced polymer composites is a crucial research topic. This study utilized in-situ electrografting of different monomers on the fiber surface to improve interfacial bonding performance and enhance the mechanical properties of the composites.
The interface is a fundamental and crucial research topic throughout the development of carbon fiber reinforced polymer composites. However, it is a huge challenge to solve the problem of fiber surface inertness thoroughly to enhance the interfacial bonding with the resin, especially for high modulus carbon fibers with higher degree of graphitization and fewer microcrystalline active points for commercial production. This manuscript reports that different monomers were selected to in situ electrografting on the fiber surface to design and control the physical/chemical structure and rigidity/flexibility of the interface. The interfacial bonding performance of the composites was greatly improved, interlaminar shear strength (ILSS), interfacial shear strength (IFSS) and transverse fiber bundle tensile strength (TFBT) were increased by 15.9%, 46.8% and 39.6%, respectively, and the tensile strength of the single fiber was also increased by 12.7%. This simple, efficient (1-3min), environmental (water as solvent) and economical method shows great application prospects of fiber surface treatment tech-nology in the next generation.
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