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논문 기본 정보

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동향자료
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Park, Mi-Seon (Department of Applied Chemistry and Biological Engineering, Chungnam National University) Lee, Sangmin (Department of Applied Chemistry and Biological Engineering, Chungnam National University) Lee, Young-Seak (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
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한국탄소학회 Carbon letters Carbon letters 제21권
발행연도
2017.1
수록면
1 - 7 (7page)

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The effects of ammonia-treated graphene oxide (GO) on composites based on epoxy resin were investigated. Ammonia solutions of different concentrations (14-28%) were used to modify GO. Nitrogen functional groups were introduced on the GO surfaces without significant structural changes. The ammonia-treated GO-based epoxy composites exhibited interesting changes in their mechanical properties related to the presence of nitrogen functional groups, particularly amine ($C-NH_2$) groups on the GO surfaces. The highest tensile and impact strength values were 42.1 MPa and 12.3 J/m, respectively, which were observed in an epoxy composite prepared with GO treated with a 28% ammonia solution. This improved tensile strength was 2.2 and 1.3 times higher than those of the neat epoxy and the non-treated GO-based epoxy composite, respectively. The amine groups on the GO ensure its participation in the cross-linking reaction of the epoxy resin under amine curing agent condition and enhance its interfacial bonding with the epoxy resin.

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