Multi-level pore material

Abstract

The present invention relates to a multi-level pore material, which comprises a multi-level porous material, and comprises a material body, wherein the material body comprises pore cavities graded according to the material pore size and cavity walls enclosing to form the pore cavities, and the pore cavities present the uniform distribution. The multi-level pore material is characterized in that the cavity wall encloses to form the upper-level cavity in a three-dimensional space manner while is provided with the lower-level pore cavity, various levels of the pore cavities are respectively communicated to each other and penetrate through each other, and the uniform distribution of the pore cavities is that the uniform distribution is presented under any unit-level volume on the multi-level pore material. According to the present invention, the grading structure form of the pore cavities of the material can meet a variety of function requirements; and the pore distribution uniformity of the multi-level pore material is measured in the small unit-level volume scale, such that the multi-level pore material is highly uniform so as to ensure the uniformity of the multiple performances of the multi-level pore material.

Description

technical field [0001] The invention relates to a porous material, especially a hierarchical porous material. Background technique [0002] Porous materials have low relative density, high specific strength, high specific surface area, light weight, sound insulation, heat insulation, and good permeability. Wide application prospects. Among porous materials, hierarchically porous materials have received more and more attention due to their unique properties. Hierarchical porous materials have the advantages of all levels of pores at the same time, and at the same time have the advantages that single-pore materials do not have. For example, microporous-mesoporous materials have the respective advantages of microporous materials and mesoporous materials. , making it superior to single-cavity porous materials. For example, a hierarchical porous carbon material with 317 nm pores and 10 nm mesoporous materials is used as a catalytic reaction electrode, and its catalytic activit...

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Problems solved by technology

[0004] CN201210185031 discloses a method for preparing a bionic artificial bone with a multi-level (micron / nano) pore structure, which introduces a method of using selective laser (spot diameter is micron scale) sintering to achieve 150-800µm gradient through holes, using a small amount of mixed The polymer microspheres are oxidized and decomposed during the sintering process to form random spherical pores of 10-100 μm, and the surface irregular pores of tens of nanometers are obtained by corrosion process. This method finally obtains a three-dimensional multi-level pore structure. Due to the pore structure Randomness and irregularity, the preparation method cannot produce regular pores, and the hierarchical porous material with this structure still cannot meet the functional requirements of bionic artificial bone

[0005] In addition, the application requirements of many hierarchical porous materials require that the material itself is uniform, that is, the size of the pores and the distribution of the pores are uniform, so that the performance is uniform, but in fact, many hierarchical porous materials cannot meet this requirement, and their uniformity Insufficient; although some materials claim to have achieved high uniformity, their uniformity is still the uniformity at the large volume scale. If a small volume scale is used to measure and compare, for example, the volume of multiple pieces of the material is not greater than one cubic centimeter. The quality of the three-dimensional body is measured separately, and the difference in the degree of inhomogeneity is still very large, which causes the inhomogeneity of various properties of the porous material such as strength and elastic modulus, which seriously affects its function.

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