Mechanically Robust and Multifunctional Ionogels Based on Cellulose and Polymerizable 1-Butyl-3-Methylimidazolium Chloride/Acrylamide Deep Eutectic Solvent
Nan Li, Yingxuan Qiu, Jing Ma, Liyuan Qiu, Wenqing Sun, Jincan Li, Zongliang Han, Wei Chen, Xingxiang Ji
Abstract
Ionogels have gained extensive research interest in various advanced application scenarios. However, it remains a big challenge to integrate multiple functions into one ionogel system that can be widely applied in various complex scenes. In this study, a BmimCl/AM polymerizable deep eutectic solvent (PDES) is rationally designed, and cellulose was successfully introduced into the PDES system to construct high-performance and multifunctional cellulose-based ionogels. BmimCl/AM PDES gives ionogels the ability to resist low temperatures (−20 °C). The introduction of cellulose greatly enhances the mechanical properties of ionogels. Herein, multifunctional poly(PDES)/cellulose ionogels with a combination of desirable properties, including good mechanical properties (tensile strength is 1.02 MPa, elongation is 888%), high electrical conductivity (conductivity can reach 2.44 S/m), excellent self-healing (24 h self-healing efficiency exceeds 83% at room temperature), antifreezing (maintain stable flexibility and ionic conductivity at −20 °C), adhesiveness (attached to various substrates without external forces), and strain sensitivity (GF value is 1.93–3.16), are reported. Due to these outstanding properties, the feasibility of applying poly(PDES)/cellulose ionogels in human motion sensing is demonstrated. It is expected that the prepared poly(PDES)/cellulose ionogels have the potential to be applied in the field of wearable devices.