Preparation method of intercalated graphene blended polyurethane open-cell sponge for adsorption

Abstract

The invention relates to the field of graphene application, and particularly discloses a preparation method of intercalated graphene blended polyurethane open-pore sponge for adsorption, the method comprises the following steps: S1, preparation of intercalated graphene nanosheets: preparing graphite oxide by using crystalline flake graphite, and then preparing the intercalated graphene nanosheets by hydrothermal intercalation of dihydric alcohol; s2, preparing a graphene dispersion liquid; s3, preparation of foamed sponge: mixing and foaming the graphene dispersion liquid prepared in S2, an auxiliary agent and isocyanate through a pump to obtain the foamed sponge; s4, preparation of a sponge finished product: firstly cooling the foamed sponge obtained in S3, then curing and shaping, and then blasting, cutting, drying and deodorizing to obtain the sponge finished product, namely the intercalated graphene blended polyurethane open-cell sponge. According to the present invention, the requirements of large-scale production are met, the dispersion of the graphene is ensured during the preparation, the graphene is completely exposed and utilized after the blasting, and the material has advantages of excellent resilience and strong hydrophobic ability, and can well adsorb indoor harmful gas.

Description

technical field [0001] The invention belongs to the field of graphene applications, in particular to a method for preparing an intercalated graphene blended polyurethane open-pore sponge for adsorption. Background technique [0002] Graphene is a two-dimensional carbon material that can exist stably in the external environment. The single-layer graphite sheet with carbon atoms arranged in a hexagonal grid has a thickness of only one atom. It has a large specific surface area. It is one of the materials with the highest strength known, and it also has good toughness and can be bent. It is known as the king of new materials and black gold. With the development of graphene preparation technology, the cost of graphene preparation has been greatly reduced, making graphene widely used. [0003] Graphene is made of graphene sponge for adsorption by means of the multi-channel form of 3D sponge, and the structure of functionalized sponge. In the existing preparation method, the bind...

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Problems solved by technology

[0003] Graphene is made of graphene sponge for adsorption by means of the multi-channel form of 3D sponge, and the structure of functionalized sponge. In the existing preparation method, the binding ability of graphene and sponge in the main physical adsorption method is poor, and the reuse rate is low. Resin The encapsulation method blocks the pore structure of the sponge, which is not conducive to its adsorption performance. The material graphene prepared by the direct mixed foaming method of graphene is unevenly distributed, and the foaming into a closed-cell structure is not conducive to adsorption.

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