Bhandari Manan, Wang Jianchao, Jang Daeik, Nam IlWoo, Huang Baofeng
College of Civil Engineering, Nanjing Tech University, 30 Puzhu Road(S), Nanjing 211800, China.
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea.
Sensors (Basel). 2021 Nov 2;21(21):7291. doi: 10.3390/s21217291.
In this study, hybridized carbon nanomaterials (CNMs), such as carbon nanotubes (CNTs)-graphene, CNT-carbon nanofibers (CNFs), or CNT-graphite nanoplatelet (GNP) materials were embedded in glass-fiber-reinforced plastic (GFRP) or carbon-fiber-reinforced plastic (CFRP) composites to obtain electrical/piezoresistive sensing characteristics that surpass those of composites with only one type of CNM. In addition, to quantitatively assess their sensing characteristics, the materials were evaluated in terms of gauge factor, peak shift, and R-squared values. The electrical property results showed that the GFRP samples containing only CNTs or both CNTs and graphene exhibited higher electrical conductivity values than those of other composite samples. By evaluating piezoresistive sensing characteristics, the CNT-CNF GFRP composites showed the highest gauge factor values, followed by the CNT-graphene GFRP and CNT-only GFRP composites. These results are explained by the excluded volume theory. The peak shift and R-squared value results signified that the CNT-graphene GFRP composites exhibited the best sensing characteristics. Thus, the CNT-graphene GFRP composites would be the most feasible for use as FRP composite sensors.
在本研究中,将杂交碳纳米材料(CNMs),如碳纳米管(CNTs)-石墨烯、CNT-碳纳米纤维(CNFs)或CNT-石墨纳米片(GNP)材料,嵌入玻璃纤维增强塑料(GFRP)或碳纤维增强塑料(CFRP)复合材料中,以获得超越仅含一种类型CNM的复合材料的电学/压阻传感特性。此外,为了定量评估其传感特性,对这些材料进行了应变片系数、峰值位移和决定系数值方面的评估。电学性能结果表明,仅含CNTs或同时含有CNTs和石墨烯的GFRP样品比其他复合样品具有更高的电导率值。通过评估压阻传感特性,CNT-CNF GFRP复合材料显示出最高的应变片系数值,其次是CNT-石墨烯GFRP和仅含CNT的GFRP复合材料。这些结果可用排除体积理论来解释。峰值位移和决定系数值结果表明,CNT-石墨烯GFRP复合材料表现出最佳的传感特性。因此,CNT-石墨烯GFRP复合材料作为FRP复合传感器使用将是最可行的。