In this work, sensitivity and response times of PDMS-based capacitive force sensors are enhanced via the modifications of the PDMS layer. Two modifying approaches are proposed; (i) change PDMS’s (elastomer:curing agent) ratio and (ii) adding conductive polymer PEDOT:PSS into the PDMS layer. The change of PDMS (elastomer:curing agent) ratio from (10:1) to (30:1) increases the sensitivity from 0.40.08 to 0.720.23 kPa⁻¹ (+80%) but it does not significantly affect the response/recovery times. In addition, by adding 1% wt. of PEDOT:PSS to PDMS (30:1), the further increment of sensitivity from 0.720.23 to 1.440.17 kPa⁻¹ (+100%) and the shorter response time from 1.590.02 to 0.450.03s (−72%) are observed. The mechanical and electrical studies reveal that the change of PDMS (elastomer:curing agent) ratio and the adding of PEDOT:PSS to PDMS layer result in the modification of PDMS’s deformability and the increase of charge transportation, leading to the enhancement of sensing characteristics of the sensors.

在这项工作中，基于 PDMS 的电容式力传感器的灵敏度和响应时间通过对 PDMS 层的修改得到增强。提出了两种修改方法；(i) 改变 PDMS (弹性体:固化剂) 的比例和 (ii) 将导电聚合物 PEDOT:PSS 添加到 PDMS 层中。PDMS（弹性体：固化剂）比从 (10:1) 到 (30:1) 的变化使灵敏度从 0.40.08 增加到 0.720.23 kPa ^-1 (+80%)，但对响应没有显着影响/恢复次数。此外，通过添加 1% wt。PEDOT:PSS 到 PDMS (30:1)，灵敏度从 0.720.23 进一步增加到 1.440.17 kPa ^-1(+100%) 和更短的响应时间从 1.590.02 到 0.450.03s (-72%) 被观察到。机械和电学研究表明，PDMS（弹性体：固化剂）比例的变化以及向 PDMS 层添加 PEDOT：PSS 导致 PDMS 变形能力的改变和电荷传输的增加，导致传感特性的增强。传感器。