Study On Gel Materials With Controllable Deformation And High Strength

Many creatures gain unique patterns on their bodies,which not only represent their distinct characteristics,but also endow diverse functionalities that are crucial to their survival.Though being common in the nature,realizing diverse patterns with numbers of functionalities and well-defined hierarchical structures in biomimetic materials remains challenging.Here,relying on the fast and quantitative reaction between poly(penta fluorophenyl)acrylate gel and alkylamine derivatives,an efficient method for constructing versatile functional patterns on the gel named direct ink writing(DIW)is developed by using alkylamines as the ink and a capillary as the pen.In this paper,polypentafluorophenol acrylate(p PAPA)gel was first synthesized,followed by the study of the reaction of seven different alkylamine derivatives to p PFPA gel.These seven compounds have different stimulant responsiveness functions,and according to their different characteristics,multi-functional patterns can be constructed.Through carefully designing alkylamine derived functional groups,a variety of functional patterns are programed on the gel.Precisely tuning the ink concentration,volume and reaction time results to desired bending angles,curvatures and targeted shape morphing.Further,by virtue of the programable shape morphing,and the dynamic multiresponsive fluorescent ink together with a “POOLING” data extraction algorithm used in Convolutional Neural Network,advanced data encryption and anti-counterfeiting are achieved.This work not only provides a robust tool for constructing functional patterns on the biomimetic materials,but also inspires new approaches for data encryption and protection,and builds a connection between smart gels and artificial intelligence.