Title: Development and Characterization of Graphene Nanoplatelets Filled Carbon Fiber/Benzoxazine/Epoxy Composites
Authors: Poom Narongdej, Steven J. Nava, Jack T. Denk and Ehsan Barjasteh
Abstract: In this study, we report an advancement in electrical, mechanical, and thermo-mechanical properties of benzoxazine-epoxy copolymer and its resultant composites by the addition of Graphene Nanoplatelets (GNPs). The GNPs were incorporated at different loadings in a copolymer consisting of bisphenol-A based benzoxazine (BZ) and bi-functional cycloaliphatic epoxy resins (CER). A three-roll mill (3RM) calendering device was utilized to disperse the GNPs in the copolymer matrix. The composites were characterized for their electrical, mechanical, and thermomechanical properties. The addition of GNPs showed an improvement of greater than 35 % in both modulus and strength with the addition of GNPs at 0.9 wt.%. A similar trend was observed in the storage moduli, where the maximum value was obtained from the sample at the same nanoparticle loading. The electrical conductivity was achieved at the electrical percolation threshold between 0.6 and 0.9 wt.% of the GNP loadings. The BZ/CER/GNPs composites were used as a matrix to impregnate carbon fibers through the vacuum-assisted resin transfer molding (VARTM) process. The resultant composite laminates were then tested for their mechanical and electrical properties.
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Conference: SAMPE 2020 | Virtual Series
Publication Date: 2020/06/01
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