3D preparing method of ionic polymer metal composite base membrane

Abstract

The invention provides a 3D preparing method of an ionic polymer metal composite base membrane. The method comprises the steps of weighing a Nafion solution and BaTiO3 nanoscale powder according to aset mass ratio of Nafion to BaTiO3 at first, then concentrating the Nafion solution to the mass fraction of 15%, dropwise adding dimethyl sulfoxide with the volume fraction of 15% into the concentrated Nafion solution, then adding the BaTiO3 nanoscale powder into the mixed Nafion solution, stirring the mixed solution so that the solution can be sufficiently and uniformly mixed, and removing bubbles in the solution; concentrating and evaporating the obtained solution, and then conducting grinding to obtain nanoscale particles; extruding the obtained nanoscale particles to make Nafion precursorfilaments, and adopting a 3D printer for printing a design entity through the Nafion precursor filaments to obtain the base membrane. According to the 3D printing method, a 3D printing technology is adopted for base membrane printing, manufacturing of section-variable structures, hollow structures and other complicated structures is achieved, thick base membranes can be printed, and thicker and larger IMPCs can be prepared; through a reasonable solution preparing technology, the problem that bubbles are easily generated in a formed membrane is solved.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, in particular to a 3D preparation method for a base film of an ionic polymer metal composite material. Background technique [0002] As a kind of ionic EAP, ionic polymer metal composite (IPMC) material is composed of cation exchange membrane and platinum and other precious metals through chemical plating method. Or chemically deposit and infiltrate a layer of metal electrodes to form a composite material with a sandwich structure. As a smart material, under the action of the electric field, the opposite polar charges fixed on both sides of the polymer molecular chain produce attraction and repulsion, and the movement of the charges causes the local shrinkage and expansion of the film; when a DC voltage is applied, the film moves toward a certain direction. The direction of an electrode is bent, and the degree of bending increases as the voltage increases until it reaches a saturation state....

AI Technical Summary

Problems solved by technology

The research group used the mixture of Nafion solution, alcohol and water as the precursor material for printing IPMC matrix film, mixed Ag microparticles with Nafion solution as the electrode material of IPMC, and then heated and solidified the three-layer structure of electrode-Nafion matrix-electrode layer by layer. , but from the results, it is difficult to control the shape of the solution when it is solidified, and the surface quality of the cured material is not high, there will be obvious wrinkles, and the deformation performance is also poor