Optimization Of Properties Of Ionic Polymer Metal Composites And Its Application In Interventional Catheter

In recent years,with the progress of medical science and technology,active catheter has become a hot research topic in medical field with the advantages of miniaturization,accuracy and controllability.Active catheter driven by IPMC actuators,with the characteristics of small size,large bending deformation under low voltage and flexible,just meets the requirements of active catheter on volume and surgical risk.However,the IPMC actuators has the disadvantages of small output force,a single form of motion,and the cracks will occur on the surface of the electrode during bending,thus limiting its application in active catheter.In order to solve the above shortcomings of IPMC,IPMC with copper ions as counter ions were prepared to weaken the impact of cracks.And three-dimensional tubular IPMC and four-prism IPMC were prepared to increase its degree of freedom of bending.The specific work are as follows:?1?We propose a method to repair damaged platinum electrodes and improve the IPMC actuating performance,so IPMC with copper ions as counter ions were prepared(Cu²⁺-IPMC).The surface morphology and electrode resistance of Cu²⁺-IPMC were analyzed.In addition,the output force and displacement of lithium ions type IPMC?Li⁺-IPMC?and Cu²⁺-IPMC were compared by displacement sensor and force sensor,and the influence of Cu²⁺on driving performance of IPMC was investigated.?2?The preparation method of columnar IPMC was studied,including basement membrane casting,basement membrane roughening,surface electrode preparation and surface electrode segmentation.Tubular IPMC and self-cast quadrangular IPMC were prepared respectively.The samples were analyzed by scanning electron microscope?SEM?and optical microscope?OM?.Finally,the parameters of the preparation of the sample with optimal performance are obtained.?3?A test platform for cylindrical IPMC was built,and the displacement,output force and working time of cylindrical IPMC were tested.The active catheters driven by platelet-shaped IPMC and cylindrical IPMC were designed.Finally,the two active catheters were tested in the simulated environment to verify the feasibility of an IPMC-driven interventional catheter.