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Mechanical characterization of epoxy composite with multiscale reinforcements: Carbon nanotubes and short carbon fibers
Affiliation:1. Department of Mechanical and Manufacturing Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;2. Materials and Processing Laboratory, Institute of Advanced Technology, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;3. Department of Chemical and Environmental Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;4. Department of Aerospace Engineering, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China;2. Technical University of Denmark, Department of Wind Energy, Risø Campus, DK-4000 Roskilde, Denmark;3. KU Leuven, MTM, B-3001 Heverlee, Belgium;1. State Key Laboratory of Organic–Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;2. School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA;1. Department of Astronautics Science and Mechanics, Harbin Institute of Technology, Harbin, PR China;2. School of Aerospace, Transport and Manufacturing, Cranfield University, United Kingdom;3. Structural Integrity and Composites Group, Faculty of Aerospace Engineering, Delft University of Technology, The Netherlands
Abstract:Carbon nanotubes (CNT) and short carbon fibers were incorporated into an epoxy matrix to fabricate a high performance multiscale composite. To improve the stress transfer between epoxy and carbon fibers, CNT were also grown on fibers through chemical vapor deposition (CVD) method to produce CNT grown short carbon fibers (CSCF). Mechanical characterization of composites was performed to investigate the synergy effects of CNT and CSCF in the epoxy matrix. The multiscale composites revealed significant improvement in elastic and storage modulus, strength as well as impact resistance in comparison to CNT–epoxy or CSCF–epoxy composites. An optimum content of CNT was found which provided the maximum stiffness and strength. The synergic reinforcing effects of combined fillers were analyzed on the fracture surface of composites through optical and scanning electron microscopy (SEM).
Keywords:Nanocomposite  Carbon nanotube  Multiscale composite  Experimental study  Mechanical property
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