In this study, we report the polymer-based graphene foams through combination of bottom-up assembly and simple triaxially buckled structure design. The resulting polymer-based graphene foams not only effectively transfer the functional properties of graphene, but also exhibit novel negative Poisson's ratio (NPR) behaviors due to the presence of buckled structure. Our results show that after the introduction of buckled structure, improvement in stretchability, toughness, flexibility, energy absorbing ability, hydrophobicity, conductivity, piezoresistive sensitivity and crack resistance could be achieved simultaneously. The combination of mechanical properties, multifunctional performance and unusual deformation behavior would lead to the use of our polymer-based graphene foams for a variety of novel applications in future such as stretchable capacitors or conductors, sensors and oil/water separators and so on.
This project was jointly supported by the National Key Basic Research Program of China (Grant Nos 2012CB937503 and 2013CB934203) and the National Natural Science Foundation of China (Grant Nos 21474023, 51073044, 51173030, 11222217, 11225421, 11434010 and 11474277).
[Dai, Zhaohe; Weng, Chuanxin; Liu, Luqi; Hou, Yuan; Zhao, Xuanliang; Kuang, Jun; Shi, Jidong; Zhang, Zhong] Natl Ctr Nanosci & Technol, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China; [Dai, Zhaohe; Wei, Yueguang] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; [Dai, Zhaohe; Weng, Chuanxin; Kuang, Jun; Shi, Jidong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Lou, Jun] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA