Electrical and EMI shielding properties of sonication and irradiation modified graphene nanoplatelets filled thermoplastic polymer natural rubber nanocomposites

Wan Khairudin, Wan Mohd Amirul Farhan (2020) Electrical and EMI shielding properties of sonication and irradiation modified graphene nanoplatelets filled thermoplastic polymer natural rubber nanocomposites. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The electromagnetic activity has arisen from the rising complexity of electronic devices in the form of higher package density for shorter reaction time. Therefore, the need for efficient protection of materials from their harmful effects has been a great concern. To reduce these issues arising due to EMI, effective shielding materials are required to protect the proficient operation of electronics and electrical systems. In general, polymers such as polypropylene (PP) are insulators, with a developing category of polymer conducting being an exemption, although it is difficult, low elasticity, and expensive to use conducting polymers as stand-alone structures for EMI shielding purposes. Therefore, the hybridization of non-filler polymer with graphene and cheaper carbon black is suggested as an EMI shielding material. The hybrid filler filled polymer natural rubber nanocomposites are prepared using internal melt mixing. The shielding properties of the hybrid thermoplastic are obtained using Vector Network Analysis test. The data are further analyzed via morphological characteristics by SEM, structural analysis through XRD, electrical properties through thermal analysis, and surface resistivity test. It is expected that the effectiveness of shielding of the hybrid thermoplastic elastomer nanocomposites turns out to be better than existing shielding materials. Addition of only 1phr of Graphene Nanoplatelets are sufficient to significantly increase the electrical conductivity and addition minimal amount of Carbon Nanotubes also contributes to improve the thermal stability of the composites. With certain doses of irradiation exposed on the Graphene Nanoplatelets also helps in increasing the shielding effectiveness of the composites sample. This study’s results are critical in contributing to the development of the electronic technology industry as well as beneficial to the environment.

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