期刊
ADVANCED MATERIALS
卷 30, 期 35, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201707449
关键词
composites; folding; graphene; mechanical reinforcement
类别
资金
- Institute for Basic Science [IBS-R019-D1]
- European Commission under the Graphene Flagship Core 2 grant [785219]
- European Commission under the FET Proactive Neurofibres [732344]
- Italian Ministry of Education, University and Research (MIUR) under the 'Departments of Excellence'' grant [L.232/2016]
- National Natural Science Foundation of China [51402291]
- BrainKorea21 Plus (National Science Foundation of Korea)
- Ermenegildo Zegna Founder's Scholarship 2017-2018
- Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) [2016M3D1A1900038]
A folding technique is reported to incorporate large-area monolayer graphene films in polymer composites for mechanical reinforcement. Compared with the classic stacking method, the folding strategy results in further stiffening, strengthening, and toughening of the composite. By using a water-air-interface-facilitated procedure, an A5-size 400 nm thin polycarbonate (PC) film is folded in half 10 times to a approximate to 0.4 mm thick material (1024 layers). A large PC/graphene film is also folded by the same process, resulting in a composite with graphene distributed uniformly. A three-point bending test is performed to study the mechanical performance of the composites. With a low volume fraction of graphene (0.085%), the Young's modulus, strength, and toughness modulus are enhanced in the folded composite by an average of 73.5%, 73.2%, and 59.1%, respectively, versus the pristine stacked polymer films, or 40.2%, 38.5%, and 37.3% versus the folded polymer film, proving a remarkable mechanical reinforcement from the combined folding and reinforcement of graphene. These results are rationalized with combined theoretical and computational analyses, which also allow the synergistic behavior between the reinforcement and folding to be quantified. The folding approach could be extended/applied to other 2D nanomaterials to design and make macroscale laminated composites with enhanced mechanical properties.
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