Highly Stretchable, Self-adhesive, Ambient-stable, and Wide-temperature Adaptable Hydrophobic Ionogels for Wearable Strain Sensor
作者：Jiahang Liu, Xuemeng Yang, Min Xu, Hongnan Zhu, Yan Cheng, Shuaijie, Li, Tianci Li, Yunhong Jiao, Hongzan Song
關鍵字：離子凝膠，疏水，自粘接
論文來源：期刊
具體來源：Journal of Materials Chemistry C
發表時間：2022年
The development of hydrophobic ionogel with high stretchability, good recoverability, and
excellent stability in widely-varied environments is essential for next generation wearable sensors. Herein, a highly stretchable hydrophobic ionogel has been facilely designed and
formed by one-pot polymerizing of diacetone acrylamide (DAAM) in a hydrophobic ionic liquid of 1-Butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIMTFSI) with topological structural macro-cross-linker of acrylate terminated hyperbranched polyester. The unique deformable covalent crosslinking networks formed by multi-functional hyperbranched macromolecular and reversible non-covalent bond junctions formed by hydrogen bonding endow the ionogel with high stretchability (>1000%), good resilience, and excellent durability. These ionogels also show special rheological property, good air/underwater self-adhesiveness,
excellent optical transparency (90.5%), harsh temperature tolerance (-85-240 oC), and high ionic conductivity (10-3 S/cm). Importantly, the hydrophobic ionic liquid BMIMTFSI endows the ionogel with excellent humidity-resistance ability and suitable underwater stability. In addition, these ionogels can be used to fabricate long-term durable and stable strain sensor no matter in the air with different humidity environments or in aquatic environments, and also show superior sensing performance even at extremely cold (-50 oC) and hot (200 oC) conditions.