基于Te-PEDOT:PSS复合热电材料的柔性压力/温度传感系统

Flexible pressure/temperature sensing system based on Te-PEDOT:PSS composite thermoelectric material

随着人工智能技术的快速发展,面向人机交互技术的新型柔性传感器的需求与日俱增.柔性传感器作为智能机械手、仿生假肢手等仿生智能系统获取外界信息的重要媒介,对实现仿生触觉感知能力以及提升系统智能化具有重要意义.当前,如何通过材料与结构设计,研制具有多模态感知能力的柔性触觉传感器,已成为柔性电子领域关键挑战之一.本文采用水热法制备了Te-聚(3,4-亚乙二氧基噻吩)-聚(苯乙烯磺酸)(Te-PEDOT:PSS)复合热电材料.通过将其与三维多孔密胺泡沫骨架复合,并浸涂聚乙烯醇(PVA)薄层进行封装,实现了具有高界面稳定性的复合敏感材料体系可控制备.由此所组装的柔性触觉传感器件兼具Te-PEDOT:PSS的热电性能与三维泡沫电极板的电容性能,实现了压力/温度在接触/非接触模式下的双模态感知能力.进一步将其与智能机械手联用构建了感知反馈系统,对其在触觉感知方面应用性能进行了探索.

With the rapid development of artificial intelligence,the demand for new flexible tactile sensors for human-machine interaction technology is increasing sharply.As an essential medium for intelligent bionic systems to obtain external information,such as intelligent manipulators and bionic prosthetic hands,flexible tactile sensors are significant for realizing bionic tactile perception and improving system intelligence.Recently,fabricating multimodal tactile sensors through theoptimal design of functional material and structure has become a key challenge in the field of flexible electronics.Herein,a thermoelectric sensing material composited of Tepoly(3,4-ethylenedioxythiophene)-poly(styrene sulfonic acid)(Te-PEDOT:PSS)was prepared via a hydrothermal method,which was compounded within a three-dimensional porous dense amine foam framework and subsequently coated by a thin polyvinyl alcohol layer for encapsulation.The controllable preparation of sensitive composite materials with high interfacial stability was realized.Thus,the assembled flexible tactile sensor with a thermoelectric effect and capacitance performance can achieve the perception ability of pressure/temperature in contact/noncontact mode,respectively.Further,an intelligent manipulator sensory feedback system is constructed,and its performance in tactile perception is explored.