Study On The Preparation Method And Performance Of Artificial Muscle Based On MCNT

IPMC(Ionic Polymer Metal Composites),one kind of new artificial muscles,it possesses many intriguing advantages,such as light quality,quick response,low power consumption,high flexibility,etc.Despite of these advantages obtaining a broad prospect,its short longevity is the fatal defect to limit its application.Futhermore,the oxidation of surface metal electrode is the main cause of its short longevity.Therefore,this paper aimed at the Ag-IPMC which has been widely studied,we selected the problem that silver electrode was easy to be oxidized as starting point.More specifically,PDDA was applied to modify MCNT,then make it grow on the surface of Ag-IPMC by electrophoretic deposition method.Firstly,the forming principle of Ag electrode in Ag-IPMC was analyzed,then an electrode geometry model of Ag-IPMC was established.The gap size and the outside electrode layer thickness of electrode on the influence of electrode resistance were obtained The microstructure and material composition of active and inactive Ag electrode were analyzed by using SEM and EDS experimental apparatus.In this work,the failure reason of silver electrode of Ag-IPMC was concluded.Secondly,the MCNT was modified to be charged by adopting PDDA.By electrophoretic deposition method,the charged MCNT after modifying can grow on the silver layer of IPMC,which means MCNT-IPC was prepared successfully.According to the theory of deposition quantity formula,the key technology parameters were ascertained to be electrophoresis voltage and deposition time at the beginning of the experiment.Again,under the conditions of different electrophoresis voltage and deposition time,the movement performance of MCNT-IPC,including power output performance and displacement output performance,were tested by using artificial muscle movement performance testing platform.A longevity criterion for artificial muscle was proposed and the longevity of MCNT-IPC prepared under different technology parameters was tested.The results showed that the longevity of MCNT-IPC increased with different degree.Finally,the microstructure and topography of MCNT-Ag composite electrode acquired under different technology parameters were characterized by SEM.The growth status of MCNT influenced by electrophoresis voltage and deposition time was researched.Moreover,the relations between process parameters,movement performance and microcosmic characterization were analyzed.Samples of different growth status of MCNT were examined by EDS,the results showd that the MCNT could effectively inhibit the oxidation degree of electrode,as well as the electrode stability was enhanced.Overall,the reasons of increasing longevity of MCNT-IPC were determined.