Beta-cyclodextrin modified mesoporous silica ball-polymer hybrid proton exchange membrane and preparation method thereof

Abstract

The invention belongs to the technical field of membranes, and particularly relates to a beta-cyclodextrin modified mesoporous silica ball-polymer hybrid proton exchange membrane and a preparation method thereof. The method comprises the following steps: firstly preparing a beta-cyclodextrin modified mesoporous silica ball with a spherical shell structure; and blending the beta-cyclodextrin modified mesoporous silica ball with a polymer, so as to prepare the proton exchange membrane. According to the proton exchange membrane prepared by the method, organic-inorganic composite particles (beta-cyclodextrin modified mesoporous silica balls) are introduced, the colorless transparent character of the proton exchange membrane is not changed; the proton conductivity of the beta-cyclodextrin modified mesoporous silica ball-polymer hybrid proton exchange membrane is greatly increased in comparison with a pure polymer proton exchange membrane; especially the proton conductivity in high-temperature and / or low-humidity environments is improved exponentially or even by one order of magnitude; and meanwhile, the method disclosed by the invention is mild in preparation condition, low in production cost and easy in large-batch and large-scale production, and has a good industrial production foundation and wide application prospect.

Description

technical field [0001] The invention belongs to the field of membrane technology, and in particular relates to a β-cyclodextrin modified mesoporous silicon sphere-polymer hybrid proton exchange membrane and a preparation method thereof. Background technique [0002] The proton exchange membrane fuel cell is a power generation device that directly converts the chemical energy in fuel and oxidant into electrical energy by means of electrochemical reaction without combustion. With the increasingly prominent contradictions among international energy, resources and the environment, proton exchange membrane fuel cells, as a clean, efficient and safe green energy, have shown broad market prospects and received widespread attention. As a key component of a fuel cell—the proton exchange membrane, its performance significantly affects the performance of the fuel cell. It provides channels for the migration and transport of protons, and its comprehensive performance plays a vital role ...

AI Technical Summary

Problems solved by technology

However, when the temperature is lower than 100 °C, the proton conductivity of the composite proton exchange membrane is lower than that of pure Nafion TM membrane

[0009] The above process disperses the modified silicon spheres in the polymer matrix by blending, which is prone to agglomeration or uneven dispersion of inorganic components, and creates non-selective gaps in the membrane, thereby improving the performance of the proton exchange membrane. limit

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