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Chemically and mechanically robust SWCNT based strain sensor with monotonous piezoresistive response for infrastructure monitoring
Chemical Engineering Journal ( IF 15.1 ) Pub Date : 2020-01-23 , DOI: 10.1016/j.cej.2020.124174
Preety Ahuja , Sanjeev Kumar Ujjain , Koki Urita , Ayumi Furuse , Isamu Moriguchi , Katsumi Kaneko

The application of stretchable strain sensors in civil and structural engineering involving infrastructural monitoring has become the hot subject of research. However, their imperative performance in infrastructure monitoring is often hindered by environmental conditions particularly, underwater and corrosive environments. Herein, we report the facile fabrication of chemically and mechanically stable strain sensor based on oxidized SWCNT (ox-SWCNT) and polydimethylsiloxane (PDMS). The strong molecular level interaction of ox-SWCNT and PDMS provides sensitive piezoresistivity. Applied strain to the fabricated sensor results in highly synchronized resistive response in large strain range of 100%, demonstrating one to one correspondence (monotonous response) in resistance-strain behavior. Most importantly, the protruding structure of ox-SWCNT covered with low surface energy PDMS provides in-situ resiliency, not only towards water but also to acidic and alkaline solution. Its high durability under abrasive situations illustrates the potential applicability in real time infrastructure monitoring under harsh conditions.



中文翻译:

化学和机械坚固的基于SWCNT的应变传感器,具有单调压阻响应,可用于基础设施监控

可拉伸应变传感器在涉及基础设施监测的土木和结构工程中的应用已成为研究的热点。但是,它们在基础设施监控中的重要性能通常会受到环境条件(尤其是水下和腐蚀性环境)的阻碍。在这里,我们报告基于氧化的SWCNT(ox-SWCNT)和聚二甲基硅氧烷(PDMS)的化学和机械稳定应变传感器的简便制造。ox-SWCNT和PDMS的强分子级相互作用提供了敏感的压阻性。在制造的传感器上施加应变会导致在100%的较大应变范围内高度同步的电阻响应,从而在电阻应变行为中表现出一对一的对应关系(单调响应)。最重要的是,低表面能PDMS覆盖的ox-SWCNT的突出结构提供了原位弹性,不仅对水而且对酸性和碱性溶液都具有弹性。其在恶劣环境下的高耐用性说明了在恶劣条件下实时基础设施监控的潜在适用性。

更新日期:2020-01-23
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