Magnetic silicon dioxide compound microballoon of core-shell structure and preparation method thereof

Abstract

The invention relates to a magnetic silicon dioxide compound microballoon of a core-shell structure and a preparation method thereof. The compound microballoon takes a metallic ion complexing polymer microballoon as a core, and then ortho-silicate alkyl ester is taken as a precursor, and the silicon dioxide compound microballoon with the core-shell structure is prepared by adopting a gel-sol method, and the magnetic silicon dioxide compound microballoon is obtained by pyrolyzing the compound microballoon; wherein, the core is a metallic nano-particle / carbon compound microballoon, and the shell is the silicon dioxide. The method is simple and effective, and the preparation is convenient; therefore, the method is a novel method for preparing the magnetic silicon dioxide compound microballoon of the core-shell structure.

Description

technical field

[0001] The invention relates to a magnetic silicon dioxide composite microsphere with a core-shell structure and a preparation method thereof. Background technique

[0002] Multi-component composite microspheres can be composed of the same or completely different substances, which provides a technical guarantee for the combination of functions between different substances. The materials prepared by design can have the characteristics of each component at the same time, such as optical, electrical, magnetic and other characteristics, so as to realize the simultaneous application of multiple functions in a single system, which has extensive scientific and engineering significance. Among them, superparamagnetic composite microspheres not only have the characteristics of large specific surface area and easy adsorption of ordinary microspheres, but also have the magnetic field responsiveness of inorganic magnetic materials, and can be easily and quickly separated ...