Simulation of Straw Checkerboard Barriers Structural and Growth of Go/Zno/Dspe on Fiber Surface to Construct Multiple Stress Transfer Pathways to Increase Mechanical Properties and Electromagnetic Shielding Properties of Cfrp

Abstract

Inspired by the straw checkerboard barriers for wind and sand control, we design a three-dimensional hybrid structure on the carbon fabric surface, GO/ZnO/DSPE, which simulates the straw checkerboard barriers structure interlocking the fibers and resin closely for enhancing mechanical strength and electromagnetic shielding properties of composite materials. 2D/3D joint interfacial phase has been constructed by graphene oxide (GO) nanosheet, zinc oxide nanoclusters (ZnO NWs), and polymer film phospholipid-polyethylene glycol (DSPE). The flexural strength (945.3 MPa), flexural modulus (75.5 GPa), and interlaminar shear strength (92.9 MPa) of the carbon fiber composites after assembly on the fiber surface increased by 71.8%, 90.2%, and 93.5%, respectively, compared with that of the pristine materials, which was attributed to the π-π interactions, covalent bonding and synergistic effect to the hydrogen-bonding among GO/ZnO/DSPE, fibers and resin. In addition, the composite megaliths also have a strong electromagnetic absorption (42.89 dB) compared to the original fiber composite EMI increased by 65.40%, taking advantage of electronic transfer capability. This study provides a promising way to produce multilayered composites with high mechanical properties.

Keywords: Carbon fibers, Electromagnetic interference shielding (EMI), Interfacial strength, Stress transfer