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Fabrication of functionalized graphene filled carboxylated nitrile rubber nanocomposites as flexible dielectric materials

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Abstract

Hexadecylamine (HDA) was used to covalently functionalize graphite oxide followed by its reduction to form functionalized graphene nanosheets (GNS–HDA). Subsequently, GNS–HDA has been used as filler in fabricating carboxylated nitrile rubber (XNBR) nanocomposites via solution mixing. Mechanical measurements of XNBR/GNS–HDA-2 nanocomposites compared to neat XNBR exhibited 60% improvement in tensile strength (TS), 62% improvement in elongation at break (EB) and 13% reduction in Young's modulus (YM). Thermogravimetric studies demonstrate that incorporation of GNS–HDA into a XNBR polymer matrix increases the thermal stability of composites with GNS–HDA loading. Further investigations show significant enhancement in the dielectric constant of XNBR/GNS–HDA-2 (127.6) compared to neat XNBR (8.9) at 100 Hz. The corresponding value of the dielectric loss of the composite was enhanced only ∼2 times. Such enhanced TS, EB, reduced YM and dielectric constants while retaining low dielectric loss enables the possible application of XNBR/GNS–HDA as flexible dielectric materials in electronic devices.

Graphical abstract: Fabrication of functionalized graphene filled carboxylated nitrile rubber nanocomposites as flexible dielectric materials

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Publication details

The article was received on 21 Apr 2016, accepted on 17 Oct 2016, published on 14 Nov 2016 and first published online on 14 Nov 2016


Article type: Research Article
DOI: 10.1039/C6QM00025H
Citation: Mater. Chem. Front., 2017, Advance Article
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    Fabrication of functionalized graphene filled carboxylated nitrile rubber nanocomposites as flexible dielectric materials

    R. Manna and S. K. Srivastava, Mater. Chem. Front., 2017, Advance Article , DOI: 10.1039/C6QM00025H

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