Synergistic effects of micro-/nano-fillers on conductive and electromagnetic shielding properties of polypropylene nanocomposites

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Title:	Synergistic effects of micro-/nano-fillers on conductive and electromagnetic shielding properties of polypropylene nanocomposites
Authors:	Li, TT (Li, Ting-Ting) Chen, AP (Chen, An-Pang) Hwang, PW (Hwang, Po-Wen) Pan, YJ (Pan, Yi-Jun) Hsing, WH (Hsing, Wen-Hao) Lou, CW (Lou, Ching-Wen) Chen, YS (Chen, Yueh-Sheng) Lin, JH (Lin, Jia-Horng)
Contributors:	紡織工程學系
Keywords:	ELECTRICAL-CONDUCTIVITY GRAPHENE CARBON COMPOSITES NANOPARTICLES EFFICIENCY FILMS GAS
Date:	2018
Issue Date:	2019-01-22 15:19:15 (UTC+8)
Abstract:	This study presents the synergistic effects of graphene nanosheets (GNSs) and carbon fibers (CFs) additions on the electrical and electromagnetic shielding properties of GNS/CF/polypropylene (PP) composites. These composites were fabricated by the melt blending of different ratios of GNSs and CFs (20: 0, 15: 5, 10: 10, 5: 15 and 0: 20 wt/wt%) into a PP polymer matrix using a Brabender mixer. Besides, the chemical and crystalline structures and the thermal stability of the resultant GNS/CF/PP composites were characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD) and thermo-gravimetric analysis (TGA). FT-IR and XRD showed that with the addition of GNSs content, transmittances at 1373.4 cm(-1) and 1454.4 cm(-1) became smaller and the characteristic peak at 26.82 degrees became stronger. TGA showed that the GNS/CF/PP composite can be used at high temperature below 456 degrees C. Blending 10 wt% CFs and 10 wt% GNSs into the PP polymer resulted in excellent conductivity (0.397 S/cm), which indicated the occurrence of the critical percolation threshold phenomenon, and also reached the maximum electromagnetic shielding effectiveness (EMSE) of 20 dB at 1.28-2.00 GHz. Laminated with five layers of composites, its EMSE achieved 25-38 dB at 0.3-3.0 GHz, corresponding to blocking of 94.38-98.74% electromagnetic waves.
Appears in Collections:	[Department of Textile Engineering ] journal articles

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