Polyurethane-based hydrogen absorption material and preparation method thereof

Abstract

The invention relates to the technical field of functional polymer materials, in particular to a polyurethane-based hydrogen absorption material and a preparation method thereof. The method comprises the following steps: 1) mixing hydroxyl-terminated polybutadiene and diisocyanate, and reacting to obtain a polyurethane prepolymer; 2) fully and uniformly mixing the polyurethane prepolymer with palladium on carbon; and (3) further reacting the obtained material with dihydric alcohol, or directly pouring, pressing or spin-coating to obtain polyurethane-based hydrogen absorption materials with different forms. According to the method, through cross-linking curing of hydroxyl-terminated polybutadiene rich in carbon-carbon double bonds and diisocyanate, palladium and carbon are uniformly loaded and packaged, so that the material has hydrogen absorption performance, the plasticity of the hydrogen absorption material is improved, and the phenomenon of powder falling is avoided. The preparation method is green and environment-friendly, and the prepared polyurethane-based hydrogen absorption material is low in cost, high in hydrogen absorption rate, large in hydrogen absorption capacity, easy to form and free of powder falling; and the convenience of actual use is greatly improved.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a polymer material with an irreversible hydrogen elimination function at room temperature, in particular to a polyurethane-based hydrogen-absorbing material and a preparation method thereof. Background technique [0002] As a renewable energy source, hydrogen is gradually widely used in people's production and life, and its safe storage and use have always been the focus of attention and challenges. When the hydrogen concentration reaches a certain level, there are fire and explosion hazards, and the generation and accumulation of hydrogen isotopes --- deuterium and tritium will also cause serious harm to the environment and human health. Hydrogen also has a strong penetrating ability, which can cause pitting corrosion on metal materials and damage materials and precision systems. Therefore, hydrogen absorbing materials are used to control the hydrogen conce...

AI Technical Summary

Problems solved by technology

However, most of these irreversible hydrogen absorbing materials are in the form of powder. Although the powder hydrogen absorbing agent has the advantages of fast hydrogen absorbing rate and large hydrogen absorbing capacity, the existing powder organic hydrogen absorbing agent must be packaged in a breathable outer package. Only when the package is damaged, there is a risk of dust pollution, short circuit of components, etc.

At present, there are several hydrogen absorbing agent forming technologies, including adding DEB hydrogen absorbing agent into silicone rubber and forming through 3D printing, adding DEB hydrogen absorbing agent into dual continuous phase polymer substrate etching method and silanol condensation curing molding, etc. Although the problem of powder molding has been solved, most of the preparation methods are cumbersome, and the prepared materials still have the problems of slow hydrogen absorption rate, small hydrogen absorption capacity and environmental compatibility.

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