Construction And Performance Study Of A Wide Temperature Range Electrochemical Artificial Muscle System

Artificial muscles can transform different forms of stimuli(such as light,electricity,heat,magnetism,etc.)into mechanical deformation of muscle like behavior.As a new type of actuator,it has important application prospects in intelligent robots,wearable exoskeletons,implantable medical devices,and other fields.Electrochemically activated artificial muscle fibers can utilize ions driven by an electric field to undergo reversible de insertion within the fibers,resulting in stretching and contraction movements.This type of artificial muscle fiber has the advantages of low driving voltage,no obvious thermal effect,and high driving efficiency,which has attracted attention in recent years and has research significance and practical value.However,the electrochemical artificial muscle fibers currently developed still have problems such as narrow operating temperature range,difficulty in unidirectional driving due to the principle of ion de embedding,and dependence on liquid working environment.To overcome the above issues,this article uses carbon nanotube artificial muscle fibers as the driving system.Using ionic liquids as the basic electrolyte system,optimize artificial muscle fibers that can be used in a wide temperature range,and construct a solid-state artificial muscle system.The main work is as follows:Firstly,helical carbon nanotube artificial muscle fibers were prepared by floating catalytic chemical vapor deposition method for electrochemical driving,and the fiber electrode was dynamically electrochemically modified byπ-πconjugation between the imidazole ring and carbon nanotubes,thereby preparing unipolar stroke artificial muscle fibers.Summarized the changes in morphology,differential capacitance curve,orientation,and driving performance of artificial muscle fibers before and after electrochemical stretching.For the first time,an ionic liquid electrolyte without organic and aqueous solvents was used for electrochemical driving of carbon nanotube artificial muscle fibers.Carbon nanotube artificial muscle fibers have achieved stable operation over a wide temperature range(-40 ~oC to 80 ~oC).Optimize the electrochemical driving performance of artificial muscle fibers at different temperatures.A solid-state artificial muscle fiber that can operate in vacuum was constructed through electrospinning,insertion twist,and design structure.A layer of PVDF-HFP nanofiber membrane is covered on the surface of CNTs to avoid short circuits and store ionic liquids.Use the regulated ionic liquid electrolyte to drive the contraction of all solid-state artificial muscle fibers.