Multifunctional all-biomass-derived hydroplastic thermoset polyimine for 3D multiple information encryption and self-adhesive strain sensors
Qi Zhao, Meng Zhang, Fei Song, Yijiao Xue, Zheng Pan, Yonghong Zhou
Abstract
The development of sustainable and eco-processing thermosets with excellent mechanical properties and advanced functionality is important but faces great challenges. Here, we prepare all-biomass-derived thermoset polyimines containing dynamic networks of non-covalent aggregates (driven by H bonds and π-π stacking) and imine bonds. Smart molecular design leads to multifunctionality, such as tunable mechanical properties, hydroplasticity, polychromatic photoluminescence, and composite reprocessing. Effectively combining these functions provides convenient ways for designing materials with advanced applications. We demonstrate the feasibility of building a 3D anti-counterfeiting platform, allowing polymorphic data encryption and multidimensional decryption, as well as sensitive stretchable dry and self-adhesive strain sensors with appropriate conformal contact with the skin. The nitrogen-rich synergistic high-char-forming benzene rings give it an intumescent flame-retardant performance that meets the criteria for fire safety. The results provide insights into sustainable bio-based plastics with integrated functions and advanced applications.