期刊
ACS NANO
卷 4, 期 12, 页码 7415-7420出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn102529n
关键词
graphene nanoribbons; multiwalled carbon nanotubes; nanocomposites; mechanical properties; structural reinforcement
类别
资金
- USA Office of Naval Research [N000140910928]
- USA National Science Foundation [0900188]
- Federal Aviation Administration [2007G010]
- Air Force Office of Scientific Research [FA9550-09-1-0581]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [0900188] Funding Source: National Science Foundation
It is well established that pristine multiwalled carbon nanotubes offer poor structural reinforcement in epoxy-based composites. There are several reasons for this which include reduced interfacial contact area since the outermost nanotube shields the internal tubes from the matrix, poor wetting and interfacial adhesion with the heavily cross-linked epoxy chains, and intertube slip within the concentric nanotube cylinders leading to a sword-in-sheath type failure. Here we demonstrate that unzipping such multiwalled carbon nanotubes Into graphene nanoribbons results in a significant improvement In load transfer effectiveness. For example, at similar to 0.3% weight fraction of nanofillers, the Young's modulus of the epoxy composite with graphene nanoribbons shows similar to 30% increase compared to its multiwalled carbon nanotube counterpart. Similarly the ultimate tensile strength for graphene nanoribbons at similar to 0.3% weight fraction showed similar to 22% improvement compared to multiwalled carbon nanotubes at the same weight fraction of nanofillers in the composite. These results demonstrate that unzipping multiwalled carbon nanotubes into graphene nanoribbons can enable their utilization as high-performance additives for mechanical properties enhancement in composites that rival the properties of singlewalled carbon nanotube composites yet at an order of magnitude lower cost.
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