am1c21325_si_010.mp4 (958.79 kB)
Ultrastretchable, Adhesive, Fast Self-Healable, and Three-Dimensional Printable Photoluminescent Ionic Skin Based on Hybrid Network Ionogels
mediaposted on 2021-12-27, 17:47 authored by Shuai Hao, Tianci Li, Xuemeng Yang, Hongzan Song
Developing multifunctional stretchable ionic skin (I-Skin) to mimic the sensations of the human skin is of great interest and shows promising potential in wearable sensors and human–machine interfaces (HMIs). However, common ionogels prepared with small-molecule cross-linkers and single networks can hardly satisfy the requirements of adjustable mechanical properties, strong adhesion, fast self-healability, and good stability in extreme environments. Herein, an ultrastretchable (>10,000%), ultrastrong adhesive (>6.8 MPa), ultrafast self-healable (10 s), high thermally stable (−60 to 250 °C), and three-dimensional (3D)-printable photoluminescent ionogel with shape memory properties has been designed. The ionogel consists of hyperbranched polymer covalent-cross-linked poly(zwitterionic ionic liquid)-co-poly(acrylic acid) and multiple dynamic bonding cross-linked networks. The excellent performance of the ionogel-based high-stretchable strain sensor and the triboelectric nanogenerator (TENG)-based self-powered touch sensor is further demonstrated over a wide temperature range (−40 to 150 °C). More importantly, ionogel-based I-Skin can work as an HMI for human gesture recognition and real-time wireless control of robots under extreme vacuum conditions and can also self-heal immediately along with function recovery after mechanical damage.
time wireless controlstretchable strain sensorshows promising potentialshape memory propertiespowered touch sensorhyperbranched polymer covalentheal immediately alongcommon ionogels preparedhuman gesture recognitionextreme vacuum conditionsadjustable mechanical propertiesultrastretchable (> 10mechanical damageextreme environmentswearable sensorstriboelectric nanogeneratorstrong adhesionsingle networkslinked networkshuman skinhmis ).hardly satisfygreat interestgood stabilityfunction recoveryfast selfexcellent performancealso self