A kind of polymer molecular cluster nanocomposite catalytic material and its preparation method and application

Abstract

The invention belongs to the technical field of catalytic materials, and discloses a polymer molecular cluster nanocomposite catalytic material, a preparation method and application thereof. The polymer molecular cluster nanocomposite catalytic material is mainly prepared from molecular clusters and acrylate monomers; the molecular clusters are polyoxometalate molecular clusters, which are at least one of Lindqvist type, Keggin type or Anderson type. The invention also discloses a preparation method of the composite catalytic material. The composite catalytic material of the present invention has good mechanical properties, high catalytic efficiency, good catalytic stability, and is easy to recycle, and avoids the shortcomings of traditional materials such as reduced catalytic efficiency, poor stability, and inability to be recycled due to the departure of the catalytic center during the catalytic process. ; In addition, the catalytic material of the present invention can realize gas separation catalysis. The catalytic material of the invention is applied in the fields of gas separation catalysis and heterogeneous catalysis.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a polymer molecular cluster nanocomposite catalytic material and its preparation method and application. Background technique [0002] In recent years, due to the excellent film-forming properties of polymer nanocomposites and high compatibility with various solutions, the application of such materials has been extended to the fields of gas separation catalysis and heterogeneous catalysis. Traditional polymer nanocomposites combine nanoparticles into the polymer matrix through non-covalent interactions such as electrostatic adsorption, hydrogen bonding, and hydrophilic-hydrophobic interactions. However, due to this weak force, there are some problems in the catalytic process of this system. One is that traditional polymer nanocomposites often increase the content of nanoparticles in order to improve their mechanical properties, but as the content of nanop...

AI Technical Summary

Problems solved by technology

However, due to this weak force, the system has some problems in the catalytic process.

One is that traditional polymer nanocomposites often need to increase the content of nanoparticles in order to improve their mechanical properties, but as the content of nanoparticles increases, it will cause phase separation, resulting in limited mechanical properties.

The second is that traditional polymer nanocomposites tend to sacrifice the solvent compatibility of the material with the increase of its nanoloading capacity, which leads to a decrease in the swelling rate of the material and makes it difficult for the reaction substrate to contact the catalytic center, resulting in a decrease in the catalytic efficiency of the material.

The third is that in the swollen state of the traditional polymer nanocomposite, the nanoparticles in it gradually leave due to the weak interaction with the polymer chain, which leads to a decrease in catalytic stability and is difficult to reuse.

In addition, gas separation catalytic membrane materials generally have the disadvantages of low selectivity and low catalytic efficiency.

A single molecular cluster has a high catalytic effect as a catalytic material, but it is difficult to recycle and reuse due to its small particle size (such as: some molecular cluster particle size<10nm)

At present, the lack of reusable and efficient catalysts in the catalytic oxidation of sulfides still restricts its development.

Images