Anisotropically conductive polypropylene/nickel coated glass fiber composite via magnetic field inducement
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In this work, we have reported a facile strategy to prepare an anisotropic conductive polypropylene/nickel coated glass fiber (PP/NCGF) composite with aligned NCGF network, through magnetic-assistant compression molding method. Owing to the high aspect ratio and particular magnetism, the conductive NCGF exhibits significant responsivity to the magnetic field during the molding process and thus aligns automatically in the PP matrix. The resultant PP/NCGF composite shows obvious anisotropy in electrical and electromagnetic interference (EMI) shielding performance. The electrical conductivity parallel to the magnetic field direction (1.46 S/m) is 18 times higher than that of perpendicular direction (8.06 × 10−2 S/m), and the EMI shielding effectiveness shows 8 dB disparity (15 dB in parallel direction and 23 dB in perpendicular direction). The anisotropic PP/NCGF composite would be considered as promising EMI shielding material where discrepant shielding level is required in orthogonal directions.
KeywordsConductive Filler Conductive Network Magnetic Field Direction Shield Effectiveness Magnetic Field Inducement
The authors gratefully acknowledge the financial support of this work by Natural Science Foundation of Shanxi Province (No. 2014021018-5). We also thanks for the support by Science and Technology Innovation Team of New Functional Polymeric Composites of Shanxi Province.
- 29.R.H. Zhou, H.Y. Chen, C.J. Xu, X. Hou, G.L. Liu, Y.Q. Liu, J. Mater. Sci. 6, 3530–3537 (2015)Google Scholar