Excellent electromagnetic interference shielding and mechanical properties accomplished in a manganese dioxide decorated graphene/polymer composite

Abstract

In this work, we have incorporated pristine graphene and graphene sheets decorated with α and δ forms of manganese dioxide in a hydrogenated nitrile butadiene rubber matrix to obtain high‐performance composites. The dual mixing technique was adopted to fabricate the composites having enhanced tensile, dielectric, and electromagnetic interference (EMI) shielding properties. The pristine graphene was introduced at various loadings, however, the α and δ manganese dioxide doped graphene was integrated at a single 8 phr concentration onto the rubber matrix. At an optimized concentration of 8 phr graphene in the matrix, a 101% increase in the tensile strength was observed compared to the unfilled rubber. An excellent improvement in the dielectric properties and a high EMI shielding value of 24.5 dB was observed for the15 phr loaded composite having a thickness of 2 mm. The composites should principally find applications as a robust and lightweight EMI shielding material.

Graphene nanoplatelet filled elastomer composites; influence of different matrices on the dispersion, electrical and mechanical properties

“…This technique was already established by the same author in the earlier publications. [17,23] In this process, first the elastomer is dissolved in the THF solvent, then a calculated amount of GnP (activation is carried out using ultrasonication) is added to the mixture and stirring is continued until dispersion of GnP in the matrix is achieved. The mixture was cast onto a glass petri dish for initial drying, which was then transferred to a vacuum oven for drying until a constant weight was achieved.…”

Fabrication of electrically conductive interconnected microcellular thermoplastic elastomeric foam composite for absorption dominating electromagnetic interference shielding with ultra low reflection

“…5 Unlike traditional metal-based EMI shielding materials, which have limited application prospects, conductive polymer composites (CPC) are expected to play a growing role in EMI shielding applications due to their low density, low cost, corrosion resistance, superior processability, and tailorable mechanical and functional properties. [6][7][8] Conductive carbonaceous fillers like carbon black, [9][10][11][12] single-walled 13,14 and multi-walled carbon nanotubes, [15][16][17][18] graphene 19,20 or reduced graphene oxide, [21][22][23][24] and carbon fiber, metallic nanofillers such as MXene [25][26][27][28] and Fe 3 O 4 were widely used to induce conductivity in the insulative polymer matrix. The addition of filler material enhances conductivity but compromises material density and flexibility, which are desirable, especially in aerospace and automobile applications.…”

Superior electromagnetic interference shielding effectiveness of functionalized MWCNTs filled flexible thermoplastic polymer nanocomposites

“…Mitigating all the shortcomings possessed by metals, conductive fillers, when reinforced with electrically insulating polymers, can emerge as a flexible and lightweight shielding material that can be processed with ease and operated in a harsh environment. Due to the excellent electrical conductivity, the carbonaceous fillers such as carbon nanotubes (CNTs), [5][6][7] short carbon fibers (SCF), 8,9 carbon nanofibers (CNFs), 10,11 graphene, [12][13][14][15] graphite, [16][17][18][19][20][21][22] conductive carbon black, 8,[23][24][25][26][27] and metal nanoparticles, [28][29][30][31][32] have been extensively used in polymeric composites which exhibited outstanding EMI SE.…”