DIELECTRIC PERMITTIVITY, EMW FILTERING AND MECHANICAL STRENGTH BEHAVIOUR OF Cu-PARTICLE/MICROWIRE-MESH REINFORCED UNSATURATED POLYESTER COMPOSITE IN 2-18GHz MICROWAVE REGION

[摘要] Electromagnetic wave filtering materials with conductive nano copper particles and micro-wire mesh was fabricated and analyzed for its performance. The principal aim of this research work is to evolve the importance of high purity copper nano particles into copper wire-mesh reinforced unsaturated polyester resin composite in electromagnetic wave filtering behaviour. Copper particles of 70 nm where prepared via electrolysis process. The prepared nano copper particles were surface activated by 3-Aminopropyletriethoxysilane (APTES). The copper micro wire-mesh is also treated by strong acid for more porous surfaceto ensure better adsorption. The unsaturated polyester copper/copper wire-mesh hybrid composites were prepared using hand layup process. The dielectric results show that additions of ultra fine copper particles into copper wire-mesh reinforced unsaturated polyester composite give maximum dielectric constant of 12. The wave attenuation coefficient and noise level of particle and wire-mesh reinforced unsaturated polyester composite gives 0.32 and -38 dB at frequency 16 GHz for composite contain copper wire-mesh reinforced along with 15 wt.% of treated copper particles.The tensile and flexural results of 85 MPa and 115 MPa were observed for composite, which contain 50 wt.% of micro-wire mesh and 10 wt.% of copper nano particles.

[学科分类] 生物技术

[关键词] Polymer composite;Cu-particle/wire-mesh;APTES;EM filtering;TEM