Ultrastretchable, Adhesive, Fast Self-Healable, and Three- Dimensional Printable Photoluminescent Ionic Skin Based on Hybrid Network Ionogels
writer：Shuai Hao, Tianci Li, Xuemeng Yang, Hongzan Song
keywords：I-Skin, stretchable ionogels, self-healing, adhesive, photoluminescent, 3D printing, flexible sensor, human?machine interface
source：期刊
specific source：ACS Appl. Mater. Interfaces
Issue time：2022年
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 selfhealable
(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