The key characteristics of bending sensors are piezoresistive effect, hysteresis, and durability. In this study, to investigate the influence of the aspect ratio and contents of multi-walled nanotubes (MWNTs) on the properties of bending sensors, MWNT/polydimethylsiloxane (PDMS) composites were fabricated with various aspect ratios and filler contents. The MWNTs were uniformly dispersed in the composites using the three-roll milling method. By increasing the bending angle gradually, the sensitivity of each composite was analyzed. Furthermore, discontinuous cyclic bending tests were conducted to investigate the piezoresistive effect and hysteresis. In addition, stable repeatability of the composites was confirmed through continuous cyclic bending tests. As a result, optimal aspect ratios and filler contents have been presented for application in bending sensors of MWNT composites.

中文翻译：

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不同纵横比和填料含量的碳纳米管/聚合物复合材料的弯曲性能。

弯曲传感器的关键特性是压阻效应，磁滞和耐用性。在这项研究中，为了研究长宽比和多壁纳米管（MWNTs）的含量对弯曲传感器性能的影响，制造了具有不同长宽比和填料含量的MWNT /聚二甲基硅氧烷（PDMS）复合材料。使用三辊研磨法将MWNT均匀地分散在复合物中。通过逐渐增加弯曲角度，可以分析每种复合材料的灵敏度。此外，进行了不连续的循环弯曲试验以研究压阻效应和磁滞现象。另外，通过连续的循环弯曲试验证实了复合材料的稳定的重复性。结果是，