澳大利亚迪肯大学孔令学教授学术报告预告作者：纺材学院 纺院动态信息来源：本站原创 点击数：1156 更新时间：2017/9/20
A highly stretchable and conductive three-dimensional (3D) micro-wrinkled reduced graphene oxide (MWrGO) film was fabricated using a novel thermo-mechanical shrinking method from elastic rubber materials. This 3D rGO architecture not only increases the specific area for more electrons to pass through but also bestows stretchability to the conductive pathway. The structural change of micro-wrinkles during the deformation had been monitored by an in-situ straining microscopy. The electrical conductivity of the samples remained fairly stable and stayed above 25 S/cm under low deformation (no more than 30 % strain) for up to 500 mechanical stretching-release cycles. The isotropic MWrGO/PDMS composite can be stretched bi-axially. This MWrGO based stretchable composite with stable electrical properties and long life span could form a new platform for stretchable electronics.
The thickness of wrinkled GO films can be precisely controlled ranging from 0.7 to 1.7 μm to provide tailored conductivity. When the wrinkles are wellformed, the MWrGO/PDMS composites can maintain the stable electricalconductivity up to 1000 stretching-release cycles under 10 % strain, providing an idealMWrGO structure as the component of stretchable conductors. The micro-wrinkled reduced graphene oxide (MWrGO) films are superhydrophobicand superoleophilic due to their unique structure. The oil absorption performance ofGO films was examined on three oils with distinguishing viscosity. While the watercontact angle of MWrGO surface is all over 150°, the oil can easily spread on thesurface of MWrGO.
Therefore, this novel micro-wrinkled graphene material templated from rubber platforms has presented great potential to be applied in various industries.
主 讲 人：孔令学
孔令学在澳大利亚和中国主持过60多项国家及企业支持的大型项目，研发总经费超过2000万澳元，拥有丰富的项目规划与管理经验。作为澳大利亚联邦政府纳米技术委员会重要成员，参与主持总投资为5000万澳元的国家重大科研项目 - 墨尔本纳米制造中心 - 的规划与建设。发表了学术论文300余篇，其中SCI和EI收录均超过190篇以上，文章引用3800次；拥有专利20余项（国际专利3项，中国专利18项）。