Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides

• 영문명: Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides
• 발행기관: 한국탄소학회
• 저자명: Mi-Seon Park Sangmin Lee Young-Seak Lee
• 간행물 정보: 『Carbon Letters』제21권, 1~7쪽, 전체 7쪽
• 주제분류: 자연과학 > 자연과학일반
• 파일형태: PDF
• 발행일자: 2017.01.01

영문 초록

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-NH2) 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.

목차

1. Introduction

2. Experimental

3. Results and Discussion.

4. Conclusions

References

키워드

graphene oxide nitrogen surface treatment epoxy composites mechanical properties