Simultaneous reduction and functionalization of graphene oxide via antioxidant for highly aging resistant and thermal conductive elastomer composites

Preparation of elastomer/graphene composites with high aging resistance and thermal conductivity is of great significance for constructing many advanced materials, such as solar cells and light emitting diodes. Herein, an efficient one-step approach was developed to simultaneously reduce and functio...

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Bibliographic Details
Published in:Composites science and technology 2017-10, Vol.151, p.156-163
Main Authors: Zhong, Bangchao, Dong, Huanhuan, Luo, Yuanfang, Zhang, Dongqiao, Jia, Zhixin, Jia, Demin, Liu, Fang
Format: Article
Language:English
Subjects:
Advanced materials
Antioxidants
Butadiene
Composite materials
Construction materials
Elastomers
Graphene
Heat transfer
Light emitting diodes
Organic light emitting diodes
Oxidation resistance
Oxidizing agents
Phenylenediamine
Photovoltaic cells
Reduction
Rubber
Solar cells
Thermal conductivity
Thermal resistance
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Summary:Preparation of elastomer/graphene composites with high aging resistance and thermal conductivity is of great significance for constructing many advanced materials, such as solar cells and light emitting diodes. Herein, an efficient one-step approach was developed to simultaneously reduce and functionalize GO via N-1,3-dimethylbutyl-N′-phenyl-p-phenylenediamine (antioxidant 4020). It was found that oxygen-containing groups in GO were effectively removed and sp2 carbon network was restored after reduction. In addition, antioxidant molecules (∼10 wt%) were chemically immobilized on the surface of reduced GO (G-4020). The immobilized antioxidant not only showed much better antimigratory efficiency than free antioxidant in styrene-butadiene rubber (SBR), but also prevented the restacking of G-4020. Consequently, apart from the enhanced mechanical strength, SBR/G-4020 composites exhibited exceptionally high long-term thermo-oxidative aging resistance compared with SBR/r-GO/4020 composites (SBR with hydrazine hydrate reduced GO and 4020). Moreover, the thermal conductivity of SBR/G-4020 composites was superior to that of SBR/r-GO/4020 composites due to the reduced interfacial thermal resistance. Potentially, one-step reaction and high-efficiency make the approach of using antioxidants a promising strategy for the eco-friendly reduction and functionalization of GO, which may offer a new path to construct high-performance elastomer/graphene composites.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2017.08.019