Department of Chemical Engineering , Hanyang University , Seoul 04763 , Korea.
ACS Appl Mater Interfaces. 2019 Aug 14;11(32):29350-29359. doi: 10.1021/acsami.9b10499. Epub 2019 Aug 1.
We demonstrate an ionic polymer artificial mechanotransducer (i-PAM) capable of simultaneously yielding an efficient wide bandwidth and a blocking force to maximize human tactile recognition in soft tactile feedback. The unique methodology in the i-PAM relies on an ionic interpenetrating nanofibrillar network that is formed at the interface of (i) an ionic thermoplastic polyurethane nanofibrillar matrix with an ionic liquid of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]) and (ii) ionic poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) conducting polymer electrodes with dimethyl sulfoxide and [EMIM][TFSI] as additives. The i-PAM-based actuator with the ionic PEDOT:PSS exhibits a stable operation up to 200 Hz at low voltage as well as a blocking force of 0.4 mN, which can be potentially adapted to soft tactile feedback. Furthermore, on the basis of this fast i-PAM, we realized alphabet tactile rendering by using a 3 × 3 i-PAM array stimulated by a dc input of 2 V. We believe that our proposed approach can provide a rational guide to the human-machine soft haptic interface.
我们展示了一种离子聚合物人工机械换能器（i-PAM），它能够同时产生高效的宽带宽和阻断力，以最大限度地提高软触觉反馈中的人类触觉识别能力。i-PAM 的独特方法依赖于一种离子互穿纳米纤维网络，该网络形成于（i）离子热塑性聚氨酯纳米纤维基质与离子液体 1-乙基-3-甲基咪唑双（三氟甲基磺酰基）亚胺 ([EMIM][TFSI]) 和（ii）离子聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸）（PEDOT：PSS）导电聚合物电极的界面之间，其中二甲基亚砜和 [EMIM][TFSI] 用作添加剂。基于 i-PAM 的致动器采用离子 PEDOT：PSS，在低电压下可稳定运行高达 200 Hz，阻断力为 0.4 mN，这可能适用于软触觉反馈。此外，基于这种快速的 i-PAM，我们使用由 2 V 的直流输入刺激的 3×3 i-PAM 阵列实现了字母触觉渲染。我们相信，我们提出的方法可以为人机软触觉接口提供合理的指导。
