Abstract
Silicone rubber (SR)/polyolefin elastomer (POE) blends containing ionic liquids modified with carbon blacks (CB-IL) and multi-walled carbon nanotubes (CNT-IL) were prepared by melt-blending and hot pressing. SR/POE/CB-IL and SR/POE/CB-CNT-IL composites showed co-continuous structural morphologies. The cation–π interactions between ILs and CNTs were stronger than those between ILs and CBs due to the large length and high surface area of CNTs, which promoted better dispersion of carbon fillers. SR/POE/CB-CNT-IL composites showed higher EMI SE than SR/POE/CB-IL composites containing identical filler contents because the CNTs with larger aspect ratios helped form more electrically-conductive networks.
Highlights
In the rapidly-growing information age, silicone rubber has seen extensive application in the electronic and electrical equipment industries due to its excellent chemical resistance, non-toxic nature, heat-resistance, freeze-resistance, and good flexibility [1]
The synergistic effect of Ionic liquids (ILs) modified with carbon blacks (CBs) and carbon nanotubes (CNTs) on the morphology and the electromagnetic interference (EMI) shielding properties of silicone rubber/polyolefin elastomer/carbon black-carbon nanotube-ionic liquid (SR/POE/CB-CNT-IL)
Carbon fillers modified by ILs were premixed with Silicone rubber (SR) and mixed with POE
Summary
In the rapidly-growing information age, silicone rubber has seen extensive application in the electronic and electrical equipment industries due to its excellent chemical resistance, non-toxic nature, heat-resistance, freeze-resistance, and good flexibility [1]. Silicone rubber is electrically-insulating and transparent to electromagnetic radiation. Conductive rubber composites containing carbon materials, such as carbon blacks and multi-walled carbon nanotubes, have excellent electrical conductivities and flexibility and have been widely used as EMI shielding materials [5,6]. A typical approach is to add a single type of carbon material into a single kind of polymeric matrix to increase the shielding ability of the carbon-based polymer composites [7,8,9,10]. Carbon blacks (CBs) and carbon nanotubes (CNTs) were modified with. The synergistic effect of ILs modified with CBs and CNTs on the morphology and the EMI shielding properties of silicone rubber/polyolefin elastomer/carbon black-carbon nanotube-ionic liquid (SR/POE/CB-CNT-IL). Sci. 2019, 9, 1774 composites were systematically investigated to reveal the mechanism of the enhanced EMI shielding performance
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