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Method for strengthening and toughening biological ceramic material by use of graphene and preparing artificial bone prepared from material

A technology of bioceramics and bioactive ceramics, applied in medical science, prosthesis, etc., can solve problems such as low strength and poor toughness, achieve good product performance, improve strength and toughness, and avoid structural damage

Inactive Publication Date: 2014-03-26
CENT SOUTH UNIV
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Problems solved by technology

[0006] Aiming at the problems of low strength and poor toughness in bioactive ceramics, the present invention proposes a method of using graphene to strengthen and toughen ceramic materials, and adopts selective laser sintering to prepare graphene / bioceramic artificial bone, so as to make its strength and Toughness meets the requirements of bone repair and replacement in weight-bearing parts of the body

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  • Method for strengthening and toughening biological ceramic material by use of graphene and preparing artificial bone prepared from material
  • Method for strengthening and toughening biological ceramic material by use of graphene and preparing artificial bone prepared from material

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[0017] The specific embodiment of the present invention is set forth below by an example:

[0018] Using single-layer graphene and β-tricalcium phosphate (β-TCP) ceramic powder as raw materials, the single-layer graphene (JCG-2, Nanjing Jicang Nano Technology Co., Ltd.) has a diameter of 0.8-3 μm and a thickness of 0.8-1.2 nm, purity 99.8%; β-TCP (Kunshan Overseas Chinese Technology New Material Co., Ltd.) has a calcium-phosphorus ratio of 1.50±0.03, an average particle size of 200nm, and a purity of 98%. A uniformly mixed graphene / β-TCP mixed powder was obtained after grinding for 30 min by mechanical mixing, wherein the mass fraction of graphene was 1 wt%. Using the self-developed selective laser sintering system, the graphene / β-TCP mixed powder was sintered and formed under the process conditions of laser power 10W, scanning speed 100mm / min, spot diameter 1mm, and powder coating thickness 0.2mm. After the sintering is completed, the artificial bone is taken out from the mo...

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Abstract

Aiming at the problems of low strength and low toughness of bioactive ceramics, the invention provides a method for strengthening and toughening a bioactive ceramic material by use of graphene and preparing graphene / biological ceramic artificial bone by a selective laser sintering (SLS) technology. The method has the advantages that graphene is added into the bioactive ceramic (hydroxylapatite, calcium phosphate, bioglass, calcium silicate and the like) as a nano enhanced phase, and the strength and toughness of the ceramic can be remarkably improved by use of the excellent mechanical property of graphene; the SLS technology is applied to the preparation process of graphene / biological ceramic artificial bone, and the sintering time can be shortened to the second level and even millisecond level by use of the characteristic of quick heating and cooling of laser so as to avoid structural injury of graphene caused by long-time high-temperature effect. The method for strengthening and toughening the ceramic material by use of graphene provided by the invention is of great significance to the application of bioactive ceramic to the load bearing parts of the human body.

Description

technical field [0001] The present invention faces the field of bionic manufacturing science, especially in the preparation process of bionic ceramic artificial bone, provides a bioactive ceramic material that uses graphene to strengthen and toughen, and adopts selective laser sintering technology (Selective laser sintering, SLS) to prepare Graphene / bioceramic artificial bone method, which is expected to expand the application range of bioactive ceramics to bone repair and replacement in weight-bearing parts of the human body. technical background [0002] Bioactive ceramics mainly include hydroxyapatite (Hydroxyapatite, HAP), tricalcium phosphate (Tricalcium phosphate, TCP), bioactive glass (Bioactive glass, BG) and calcium silicate (Calcium silicate, CS). Bioactivity, biocompatibility, osteoconduction and even osteoinduction, can be gradually degraded and absorbed in the physiological environment, and have shown extremely broad development prospects in the field of bone ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/42A61L27/10
Inventor 帅词俊彭淑平高成德李鹏健
Owner CENT SOUTH UNIV
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