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Inorganic/organic nano-composite bioactivity porous material and its preparation method

A nanocomposite and bioactive technology, applied in the field of inorganic-organic nanocomposite bioactive porous materials and their preparation, can solve the problems of difficult processing, easy fracture, displacement, etc., and achieve simple equipment, easy pore size, and convenient operation. Effect

Inactive Publication Date: 2005-05-04
SICHUAN UNIV
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Problems solved by technology

[0005] The currently used calcium-phosphorus bioactive ceramic substitute materials containing hydroxyapatite components are brittle, difficult to process, and easy to break in bulk products; while granular ceramic products have the disadvantages of wandering and displacement, and these The mechanical properties of calcium phosphate bioactive materials are not satisfactory

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Embodiment Construction

[0028] Preparation of nano-apatite crystals

[0029] 20 grams of analytically pure Ca(NO3 ) 2 .H 2 O was added into 30 grams of analytically pure dimethylacetamide (or dimethylformamide) under stirring to form solution A. 12 grams of analytically pure Na 3 PO 4 10H 2 O was dissolved in 1000ml deionized water to make solution B. Ca(NO 3 ) 2 .H 2 O and Na 3 PO 4 10H 2 The amount of O is used in such a range that the calcium / phosphorus molar ratio of the generated hydroxyapatite is 1.60-1.67. Heat solution B to 60°C, slowly drop solution A into solution B under constant stirring, continue to stir for 2 hours after titration, keep the temperature at 60°C, then age at room temperature for 24 hours, centrifuge , discard the supernatant, and wash three times with deionized water to obtain a slurry of apatite deposits. The slurry containing about 10% (weight ratio) of apatite deposits is heated in a boiling state for 2-4 hours. During this process, the reduced amount of ...

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Abstract

Inorganic / organic nanocomposite bioactive porous material and its preparation method. The material is composed of hydroxyapatite / medical polyamide 66 composite material with a weight ratio of (0.25-1.5) / 1, which contains interpenetrating pores with a pore size of 1-300 microns, and the total volume of the pores accounts for 30% of the total volume of the material- 70%. During the preparation, the nano-hydroxyapatite and the medical polyamide 66 are mixed according to the said ratio, and the particle size and the proportion in the total volume are respectively related to the desired pore diameter and porosity in the obtained material. Compatible medical water-soluble salt particles are mixed evenly, and after solidification and molding under the pressure of 3-8MPa and temperature of 260-290°C, they are fully dissolved in water to remove the water-soluble salts present in the solidified material. Such components can be used to obtain bioactive porous materials with desired pore size and porosity. The material can have good biological function, porosity and mechanical strength that can meet the requirements of mechanical properties.

Description

technical field [0001] The invention relates to an inorganic-organic nanocomposite bioactive porous material and a preparation method thereof. Background technique [0002] Bone repair materials and tissue engineering materials are a new intersecting field of material science and life science, which provide a promising new method for bone defect and bone tumor, and refractory fracture repair, among which porous materials are the key to bone repair. One of the key technologies of engineering. [0003] Calcium-phosphorus material is the main component of the inorganic matter of human hard tissue, has natural affinity with human tissue, can form a strong biological bond with human soft and hard tissue, and has good biocompatibility and biological activity . Since the inorganic matter of natural bone is mainly composed of nano-hydroxyapatite, nano-hydroxyapatite accounts for about 65% of the weight in natural bone. Therefore, the principle and advantages of using nano-hydroxy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K3/32C08L77/00
Inventor 李玉宝魏杰杨爱萍
Owner SICHUAN UNIV
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