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Strain-rate independent small-strain-sensor: Enhanced responsiveness of carbon black filled conductive rubber composites at slow deformation by using an ionic liquid
Composites Science and Technology ( IF 9.1 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.compscitech.2019.107972
Jirawat Narongthong , Sven Wießner , Sakrit Hait , Chakrit Sirisinha , Klaus Werner Stöckelhuber

Abstract Small-strain-sensors, based on conductive carbon black (CB) filled conductive rubber composites (CRCs), have been developed. An ionic liquid (IL) was used to improve the way that the piezoresistive response is independent of strain rate at small strains. Cyclic sensing behaviour at small strains was investigated under a sequential alteration of strain rates. At small strains, the CRCs without IL respond inefficiently to slow deformation cycles, giving a strain-rate dependent sensitivity. On the contrary, the presence of IL enhances the response to slow deformations. At elongations up to 3%, the loosely packed conducting parts and the sufficient rubber-filler interaction achieved with the use of an IL/CB ratio of 1.0 make the piezoresistive responses efficiently independent of the strain rates. Also, the sensitivity is at least threefold higher, compared with CRCs without IL. So, the IL enables the construction of strain-rate independent small-strain-sensor.

中文翻译:

应变率独立的小应变传感器:通过使用离子液体增强炭黑填充导电橡胶复合材料在缓慢变形下的响应能力

摘要 基于导电炭黑 (CB) 填充的导电橡胶复合材料 (CRC) 开发了小应变传感器。离子液体 (IL) 用于改进压阻响应在小应变下与应变率无关的方式。在应变率的连续变化下研究了小应变下的循环传感行为。在小应变下,没有 IL 的 CRC 对缓慢变形循环的响应效率低下,从而产生与应变率相关的灵敏度。相反,IL 的存在增强了对缓慢变形的响应。在高达 3% 的伸长率下,松散填充的导电部件和使用 1.0 的 IL/CB 比率实现的充分橡胶-填料相互作用使压阻响应有效地独立于应变率。还,与没有 IL 的 CRC 相比,敏感性至少高出三倍。因此,IL 能够构建与应变率无关的小应变传感器。
更新日期:2020-03-01
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