Study On Mechanism And Performance Of Integrated Dielectric Elastomer Generator

Energy,as one of the pillars of the development of human society,plays the lowest supporting role in the historical process of human beings.Due to the depletion of fossil energy and increasingly serious environmental problems,it is more and more important to find new energy sources that can be used sustainably.Dielectric Elastomer Generator(DEG),as a new type of flexible generator that converts mechanical energy into electrical energy,has attracted more and more attention in the fields of human mechanical energy harvesting and low-frequency power generation,especially in the field.Dielectric elastomers are valuable for emergency use when electricity is not available.In addition to the material itself,the conductive flexible electrodes are also important factors affecting the power generation performance of dielectric elastomers.At this stage,the research on flexible electrodes in DEG is mainly to improve its conductivity and flexibility,and there is a lack of research on solving the delamination and peeling phenomenon between DE matrix and flexible electrodes during working stretching.Therefore,we propose to use ion implantation to prepare an all-in-one generator to explore this issue.The research contents of this paper are as follows:1.First,the research of dielectric elastomer power generation has been widely concerned.After theoretical analysis and derivation,we propose to use elastomer as the matrix material to form the power generation unit,and use the ion implantation method to prepare the conductive flexible electrode.According to the dielectric properties of the material,the possible conductive properties of the elastomer after ion implantation and the possible changes of the surface properties and mechanical properties of the flexible DE material after ion implantation are analyzed and discussed.In order to better prepare a dielectric elastomer power generation unit that meets the requirements,theoretical simulation studies have also been carried out.A model study of the distribution was carried out.2.According to our experimental design and theoretical estimation,the use of silver ion implantation is an experimental scheme and method that can be operated experimentally.The MEVVA ion source is used to implant silver ions into the surface layer of the PDMS film,and the silver particles are embedded in the surface layer within a range of more than ten microns to form a conductive layer.If silver ions are implanted on both sides of the PDMS material,the flakes PDMS will form a composite material with conductive layers on both sides and an insulating layer in the middle.Due to the use of ion implantation to form our power generation element,there is no obvious phase interface between the conductive layer and the insulating layer,so the mechanical properties of the material are not very different before and after.Therefore,the mechanical delamination of the usual dielectric materials and conductive materials due to being different substances will not be formed,resulting in a significant reduction in the number of stretches.The measurement results show that after ion implantation,the surface resistivity of PDMS is 251.856)/,which is 10 orders of magnitude lower than that before implantation.Spectral testing shows that the penetration depth is about 2.5μm.In order to further improve the conductivity stability of the sample surface,ion implantation was performed after coating carbon black on the PDMS surface,and the surface resistivity was further reduced by an order of magnitude,and the change with time was more stable.The mechanical properties of PDMS did not change significantly after ion implantation,and the power generation per cycle was also stable.3.After theoretical simulation calculation,two main conclusions are drawn: the farthest penetration distance of carbon black particles depends on the concentration and the accelerating voltage,implant dose and particle energy distribution in the ion beam during implantation;when the implantation parameters are fixed,the carbon black particles The concentration distribution is a Gaussian-like distribution.Theories and experiments have been mutually confirmed.The mechanical and electrical properties of the samples after ion implantation also justify the design.From the stress-strain curve and atomic force test,it can be seen that ion implantation has little effect on the mechanical properties of PDMS films,the dielectric constant has a small increase,and the dielectric loss does not change much;the power generation of the implanted sample in a single cycle is stable,while the sample coated with carbon black injection has higher dielectric constant and higher single power generation.In summary,the flexible electrode prepared on the surface of the dielectric elastomer by the ion implantation method eliminates the phase interface between the electrode and the substrate,avoids the phenomenon of delamination and detachment,and realizes the integrated flexible electrode and the insulating electrolyte substrate.The original intention of the design provides a new design scheme for DEG generators.In addition,the proposed theoretical model provides ideas for the modification of insulating polymers and the preparation of composite materials.