Method for dynamic repairing of metal electrodes in IPMC driving process

Abstract

The invention discloses a method for dynamic repairing of metal electrodes in an IPMC driving process, and is particularly illustrated by an example of repairing of a platinum type IPMC metal electrode. The metal type IPMC is prepared by a chemical plating method; copper ions are used as driving ions and dynamic repair ions; the migration of hydrated copper ions in a base membrane is used for providing an output force for the IPMC, and at the same time, a continuous reduction reaction of the copper ions in an alternating electric field is used for self repairing of a metal layer of a platinumelectrode. A technological process comprises the steps: (1) preparation of a traditional metal electrode type IPMC; (2) preparation of a dynamic repairing ionic liquid; (3) a dynamic repairing ion exchange process; (4) a metal electrode dynamic repairing process; and (5) preservation of a sample. In the premise without increasing the cost, the electrical conductivity and output performance of theIPMC electrode are obviously improved. Experiments prove that the output performance of the IPMC after dynamic repairing is obviously improved, and the method is also suitable for electrode repairingfor a gold type IPMC, a palladium type IPMC and a silver type IPMC, and has great promotion value.

Description

technical field [0001] The invention relates to a method for dynamic repair of metal electrodes in the driving process of IPMC, and belongs to the technical field of intelligent driving. Background technique [0002] IPMC is a new type of ionic electroactive polymer, which can produce a certain deformation under electric field stimulation. Compared with traditional electroactive materials, IPMC has low driving voltage, relatively large deformation, light weight, and rapid response. Therefore, it has attracted more and more attention from researchers. IPMC is mainly composed of ion-exchange membrane (Nafion, Flemion) and surface noble metal (platinum, gold, palladium) electrode layer. Studies have shown that the conductivity of the surface noble metal layer has a great influence on the driving performance of IPMC (Shahinpoor M, Kim K J. The effect of surface-electrode resistance on the performance of ionic polymer-metal composite (IPMC) artificial muscles [J]. SmartMaterials...

AI Technical Summary

Problems solved by technology

The traditional IPMC surface electrode is a platinum electrode, but in the process of use, due to the bending of IPMC, the surface metal electrode will expand, which will cause surface cracks, resulting in an increase in the resistance of the IPMC surface electrode, which seriously affects the use of IPMC Life and drive effect

[0003] In order to reduce cracks in the bending process of IPMC and improve the continuous conductivity of IPMC electrodes, many researchers have made exploratory research, mainly using metal composite layers as IPMC electrodes, such as copper-platinum composite coatings, which significantly improve the conductivity of electrodes. (Uchida M, Taya M. Solid polymer electrolyte actuator using electrodereaction [J]. Polymer, 2001, 42 (22): 9281-9285.), the noble metal gold with better ductility as IPMC electrode, the purpose is to reduce The generation of cracks (Oguro K, Fujiwara N, Asaka K, et al. Polymerelectrolyte actuator with gold electrodes [J]. Proc Spie, 1999, 3669 (3669): 64-71.) and the use of conductive polymer materials as IPMC electrode layers , to overcome the failure of metal electrodes after long-term use (Lee SW, Kim J W, Kim Y H, et al.Actuation characteristics of all-organic polymeractuator with conducting polymer electrode[J].Macromolecular Research,2013,21(6):699- 703.), etc., but there are certain defects in the above research, such as in copper-platinum composite electrodes, the copper metal layer is easy to oxidize and fall off after applying a voltage signal, and the reusability is poor; the cost of gold electrodes is large, and the preparation process is complicated; conductive polymers The displacement and output force of the electrode-type IPMC are small, which cannot meet the requirements of practical applications

In order to solve the problem of cracks in the electrode layer and increased resistance during the use of IPMC, a dynamic repair method for the metal electrode of IPMC during the driving process is proposed to improve the conductivity and output performance of the electrode and prolong the service life of IPMC.

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