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Porous material and preparation method thereof

A technology of porous materials and porous metals, which is applied in the field of porous materials with a multi-level pore structure and its preparation, can solve the problem of unreasonable arrangement of pore structures at all levels, inability to meet the functional requirements of bone prostheses, and inability of the preparation method to effectively control the pore size, etc. problem, to achieve the effect of ensuring overall uniformity, easy implementation, and simple method

Active Publication Date: 2017-03-01
CHONGQING RUNZE PHARM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, the multi-level porous material with this structure has unreasonable structure settings of pores at all levels, and the preparation method cannot effectively control the size of the pores, nor can it meet the functional requirements as a bone restoration.

Method used

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  • Porous material and preparation method thereof
  • Porous material and preparation method thereof
  • Porous material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The porous material in this embodiment is porous tantalum with three-stage pores, wherein the uniformly distributed and interpenetrating first-stage cavities have second-stage cavities evenly distributed and interpenetrating on the cavity wall, and the second-stage cavities There are evenly distributed and interconnected third-level cavities on the wall of the cavity; and the cavities of each level are also connected to each other, and the above-mentioned perforation is a three-dimensional perforation. Each level of porous material is a continuous structure, and the maximum outer boundary of each level of porous material is equivalent to the space boundary of the entire material body.

[0055] Its preparation method is:

[0056] (1) Material preparation

[0057] Use tantalum powder with a particle size of 1-10µm as the raw material, starch with a particle size of 300nm-700nm as the pore-forming agent for the smallest primary cavity of the porous material to be prepared...

Embodiment 2

[0065] The porous material in this embodiment is porous silicon carbide with secondary pores, wherein the uniformly distributed and interpenetrating first-level cavities have second-level cavities evenly distributed and interpenetrating on the cavity wall, and the two-level pores They also penetrate each other, and the penetration is a three-dimensional penetration.

[0066] Its preparation method is:

[0067] (1) Material preparation

[0068] Use 1-10µm silicon carbide powder and 35-70µm particle size urea as the pore-forming agent for the smallest primary cavity of the porous material to be prepared, mix them evenly, and use 35-70µm starch as a binder, Prepare the slurry according to silicon carbide powder: urea: starch: distilled water at a volume ratio of 4:1.5:1:12.

[0069] The slurry is evenly filled into polyester foam with a pore size of 600-900 µm by foam impregnation, formed into a green body and dried, and then crushed to obtain a mixture of raw materials, pore-f...

Embodiment 3

[0075] The porous material of this embodiment is porous niobium with three-stage pores, wherein the uniformly distributed and interpenetrating first-stage cavities have second-stage cavities evenly distributed and interpenetrating on the cavity wall, and the second-stage cavities There are evenly distributed and interconnected third-level cavities on the wall of the cavity; and the cavities of each level are also connected to each other, and the above-mentioned perforation is a three-dimensional perforation. Each level of porous material is a continuous structure, and each level of porous material fully occupies the inner space of the entire material body.

[0076] Its preparation method is:

[0077] (1) Material preparation

[0078] Niobium powder with a particle size of 1-10µm is used as raw material, and methyl cellulose with a particle size of 200-500nm is used as the pore-forming agent for the smallest primary cavity of the porous material to be prepared. Styrene is use...

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Abstract

The invention discloses a porous material and a preparation method thereof. The material 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, 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, and various levels of the pore cavities are respectively communicated to each other and penetrate through each other. The preparation method comprises: mixing raw material powder and a pore forming agent for preparing the smallest-level pore cavity of a porous material to prepare a slurry, uniformly filling the slurry into a polymer material stent to form a billet, drying, breaking to obtain mixed particles, uniformly mixing the mixed particles and a pore forming agent for preparing the upper-level pore cavity more than the smallest-level pore cavity of the porous material to form a compact billet, carrying out vacuum sintering, and carrying out routine subsequent treatment according to the raw material process of the porous material. According to the present invention, the porous material has characteristics of good penetrating property and uniform performance, each level of the porous material has the own physical and chemical properties, a variety of function requirements can be met, the obtained porous material can be used as the biological material, the separation material and other materials, and the preparation method is simple and easy to achieve.

Description

technical field [0001] The invention relates to a porous material, in particular to a porous material with a hierarchical porous structure and a preparation method. Background technique [0002] As a multi-purpose engineering material with excellent performance, porous materials have dual properties of function and structure due to their excellent physical and mechanical properties. It has been widely used in separation, filtration, gas distribution, catalysis, electrochemical process, noise reduction, shock absorption, shielding, heat exchange, implantation and other processes in the industry. The structure of existing porous materials is relatively simple, most of which are single uniform pores. The traditional preparation methods mainly include foam impregnation method, chemical foaming method, adding pore-forming agent method, organic framework replication method, sintering microsphere method, etc. Taking the foam impregnation method as an example, the method disclosed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/56A61L27/04A61L27/02C22C1/08C22C1/05
CPCA61L27/04C22C1/08B22F3/1121C22C1/045B22F2998/10B22F2999/00F01N2330/06F01N2330/22A61L27/56A61L27/047A61L2430/02B22F2207/17B22F1/10B22F3/02B22F3/10B22F9/04C04B35/565C01B32/956A61L27/025A61L27/18A61L27/20B01D39/2027B01D2239/10B22F3/11B22F2301/20C01P2006/16
Inventor 叶雷
Owner CHONGQING RUNZE PHARM CO LTD
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