Scalable manufacturing of conductive rubber nanocomposites with ultralow percolation threshold for strain sensing applications

文献类型： 外文期刊

第一作者： Lv, Zhen

作者： Lv, Zhen;Luo, Yongyue;Huang, Xin;Fan, Dongyang;Zhou, Peng;Zhang, Xinxing

作者机构：

关键词： Strain sensors; Rubber nanocomposites; Percolation threshold; Carbon nanotubes; Surface modification

期刊名称：COMPOSITES COMMUNICATIONS （ 影响因子：6.617； 五年影响因子：6.253 ）

ISSN： 2452-2139

年卷期： 2021 年 25 卷

页码：

收录情况： SCI

摘要： Conductive elastomer composites (CECs) based on carbon nanofillers are deemed as intriguing candidates for the next generation flexible sensors. However, it is challenging to achieve scalable and eco-friendly manufacturing of CECs-based flexible sensors with low percolation threshold and reliable sensing performance. Herein, instead of the conventional chemical functionalization in toxic solvent, we present a facile and green surface modification strategy of carbon nanotubes (CNTs) by silane coupling agent with the assistance of water/ethanol solvent to fabricate natural rubber/CNTs nanocomposites. The proved high utilization efficiency of CNTs endows the CECs with ultralow percolation threshold (0.15 wt%). Meanwhile, the strong interfacial interaction between CNTs and polymer matrix contributes to their excellent tensile strength (23.83 MPa) and toughness (159.57 MJ/m3). Taking these advantages, the nanocomposites-based flexible sensors exhibit high sensitivity (GF = 19.6) with a wide strain sensing range (ca. 150%), which are able to accurately monitor both large- and small-scale human motions and possess reliable piezoresistive sensing performance. We believe this strategy will benefit the exploration of carbon-based nanocomposites for applications in strain sensors, artificial muscle, electromagnetic shielding, etc.

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