Preparation Of Highly Adhesive Compliant Electrode And Study On Actuated Performance Of Dielectric Elastomer Actuators

Dielectric Elastomer(DE)is one type of the electroactive polymers that can convert electrical energy into mechanical energy.DE has many excellent properties:Large deformation,high energy density and fast response.The Dielectric Elastomer Swing Actuator(DESA)can be used for swimming of robotic fish,flying of bionic insects,and other robots that can swing.So,DESA has important potential application value.Structural design,high-performance DE materials and large deformable flexible electrode are the keys to control the actuated performance of DESA.At present,there is still a lack of deep research on the effects of DESA structural design and flexible electrodes on swing actuated performance of DESA.In this topic,the influence of different structures on swing actuated performance of DESA was explored by designing DESA with different areas and same shape or same area and different shapes;Second,a kind of methyl vinyl silicone rubber(VMQ)with high vinyl content was prepared by an anionic ring-opening polymerization method.Based on click chemistry reaction.3-mercaptopropionic acid was successfully grafted to VMQ.Carbon-based conductive filler-doped compliant electrodes(CE)were prepared by using different polar silicone rubber.The electrical conductivity of CE under large deformation and its influence on the actuated strain of dielectric elastomer(VHB 4905)microactuator were discussed.The specific conclusions are as follows:(1)The maximum swing angle of the triangle DESA is the largest,because the revertible stiffness of the triangle DESA in the bending direction is between square and rectangular DESA.Too much or too little stiffness of the frame is not beneficial for swing;The maximum swing angle of the medium-sized DESA is the largest,because the initial bending angle is becoming larger as the working area of the DESA increases,but it is difficult to return to the initial state because the bending stiffness of the frame in the bending direction becomes smaller and smaller.So,the swing angle is small.(2)Peel strength between CE(GVMQ-lh electrode)and VHB 4905 was significantly improved.With tensile strain increasing(from 0 to 200%),the conductivity of GVMQ-1h electrode in the direction of stretching was getting better and better.Finally,VHB 4905 could generate large actuated strain under a small electric field with 100%equal biaxial pre-stretch.