Huang JianRen, Her Shiuh-Chuan, Yang XiaoXiang, Zhi MaNan
Department of Mechanical Engineering, Yuan Ze University, Chung-Li 320, Taiwan.
School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350108, China.
Nanomaterials (Basel). 2018 Oct 4;8(10):786. doi: 10.3390/nano8100786.
Graphene nanoplatelet (GNP) and multi-walled carbon nanotube (MWCNT) hybrid films were prepared with the aid of surfactant Triton X-100 and sonication through a vacuum filtration process. The influence of GNP content ranging from 0 to 50 wt.% on the mechanical and electrical properties was investigated using the tensile test and Hall effect measurement, respectively. It showed that the tensile strength of the hybrid film is decreasing with the increase of the GNP content while the electrical conductivity exhibits an opposite trend. The effectiveness of the MWCNT/GNP hybrid film as a strain sensor is presented. The specimen is subjected to a flexural loading, and the electrical resistance measured by a two-point probe method is found to be function of applied strain. Experimental results demonstrate that there are two different linear strain-sensing stages (0⁻0.2% and 0.2⁻1%) in the resistance of the hybrid film with applied strain. The strain sensitivity is increasing with the increase of the GNP content. In addition, the repeatability and stability of the strain sensitivity of the hybrid film were conformed through the cyclic loading⁻unloading tests. The MWCNT/GNP hybrid film shows promising application for strain sensing.
借助表面活性剂吐温X-100并通过超声处理，采用真空过滤法制备了石墨烯纳米片（GNP）与多壁碳纳米管（MWCNT）的混合薄膜。分别使用拉伸试验和霍尔效应测量研究了GNP含量在0至50 wt.%范围内对力学性能和电学性能的影响。结果表明，混合薄膜的拉伸强度随GNP含量的增加而降低，而电导率则呈现相反的趋势。介绍了MWCNT/GNP混合薄膜作为应变传感器的有效性。对试样施加弯曲载荷，通过两点探针法测量的电阻被发现是施加应变的函数。实验结果表明，混合薄膜的电阻随施加应变存在两个不同的线性应变传感阶段（0⁻0.2%和0.2⁻1%）。应变灵敏度随GNP含量的增加而提高。此外，通过循环加载⁻卸载试验验证了混合薄膜应变灵敏度的重复性和稳定性。MWCNT/GNP混合薄膜在应变传感方面显示出有前景的应用。
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