期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 20, 页码 13037-13050出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b02496
关键词
dopamine; graphene oxide; epoxy; curing kinetics; nonisothermal differential scanning
资金
- National Natural Science Foundation of China [U1362205, 5157031049, 51373016]
- Natural Science Foundation of Jiangsu Province [SBK2014040489]
- National High Technology Research and Development Program of China [2012AA03A203]
- Beijing Youth Talent Plan [YETP0492]
- State Key Laboratory of Organic-Inorganic Composites [OICKF201406]
The effects of dopamine reduced graphene oxide (pDop-rGO) on the curing activity and mechanical properties of epoxy-based composites were evaluated. Taking advantage of self-polymerization of mussel-inspired dopamine, pDop-rGO was prepared through simultaneous functionalization and reduction of graphene oxide (GO) via polydopamine coating. Benefiting from the universal binding ability of polydopamine, good dispersion of pDop-rGO in epoxy matrix was able to be achieved as the content of pDop-rGO being below 0.2 wt %. Curing kinetics of epoxy composites with pDop-rGO were systematically studied by nonisothermal differential scanning calorimetry (DSC). Compared to the systems of neat epoxy or epoxy composites containing GO, epoxy. composites loaded with pDop-rGO showed lower activation energy (Ea) over the range of cure (a). It revealed that the amino-bearing pDop-rGO was able to react with epoxy matrix and enhance the curing reactions as an amine-type curing agent. The nature of the interactions at GO-epoxy interface was further evaluated by Raman spectroscopy, confirming the occurrence of chemical bonding. The strengthened interfacial adhesion between pDop-rGO and epoxy matrix thus enhanced the effective stress transfer in the composites. Accordingly, the tensile and flexural properties of EP/pDop-rGO composites were enhanced due to both the well dispersion and strong interfacial bonding of pDop-rGO in epoxy matrix.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据