Method for preparing ceramic-magnetofluid composite stent

Abstract

The invention provides a method for preparing a ceramic-magnetofluid composite stent, and belongs to the field of composite material preparation. The preparation method comprises the following steps: firstly, printing a biological ceramic stent by adopting 3D gel, then preparing Fe3O4 magnetic nanoparticles by adopting an ultrasonic emulsification composite chemical coprecipitation method, then preparing Fe3O4 magnetic fluids with different volume fractions by adding different amounts of deionized water and a surfactant, dipping the ceramic stent which is subjected to 3D printing and sintering into the magnetic fluids, and then centrifuging and drying to obtain uniform Fe3O4 magnetic fluid coatings with different magnetisms on the surface of the stent. The method for preparing the magnetic nano coating is simple and stable to operate, the cost can be saved, and the production efficiency can be improved.

Description

technical field

[0001] The invention relates to a method for preparing a ceramic-magnetic fluid composite support, which belongs to the field of composite material preparation. Background technique

[0002] Magnetic fluid is composed of three parts: nano-scale solid magnetic particles, base fluid and surfactant. Usually, the magnetic nanoparticles are prepared by chemical co-precipitation method, and then the nanoparticles are coated and modified by adding a surfactant, so that they are evenly suspended in the base liquid to form a stable colloid. This is a new type of functional material, which has both the fluidity of liquid and the magnetism of solid magnetic materials. The fluid is non-magnetic in static state, and only exhibits magnetism when an external magnetic field is applied. The widely used solid magnetic particles are Fe 3 o 4 , γ-Fe 2 o 3 、MeFe 2 o 4 (Me=Co, Ni, Mg and other divalent cations), magnetic metal Co, Fe, Ni and their alloy particles, iron nit...