Prepn process of porous spherical granular inorganic material

A technology of spherical particles and inorganic materials, which is applied to ceramic products, other household utensils, household utensils, etc., can solve the problem of not being able to prepare pores larger than 6 microns, and achieve the effect of maintaining integrity and high mechanical strength

Inactive Publication Date: 2005-07-13
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple and easy to operate, but the pore size is determined by the grain gap generated by sintering, and pores larger than 6 microns cannot be prepared in the particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Get 15 parts by weight of hydroxyapatite powder under the condition of sufficient stirring, add 100 parts by weight of dimethylacetamide solvent containing 4% lithium chloride, and wait for the hydroxyapatite powder to be evenly suspended in the solvent After neutralization, add 3 parts by weight of chitin and continue to stir for about 3 days to completely dissolve the above-mentioned chitin and form a uniformly dispersed and stable slurry of hydroxyapatite powder.

[0024] (2) Quickly add the above mixture into edible oil, stir in a closed state, and emulsify the chitin slurry into spherical particles. After several hours, the particles will gel in situ under the action of water molecules in the air and endow Then transfer the formed spherical particles to deionized distilled water to fully wash and remove all solvents, then use acetone and ethanol to remove grease, and after drying process to obtain the chitin spherical particle preform containing hydroxyapatite p...

Embodiment 2

[0028] (1) Get 15 parts by weight of tricalcium phosphate powder under the condition of sufficient stirring, add 100 parts by weight of dimethylacetamide solvent containing 4% lithium chloride, after the tricalcium phosphate powder is evenly suspended in the solvent , add 3 parts by weight of chitin, and stir continuously for about 3 days to completely dissolve the above-mentioned chitin and form a uniformly dispersed and stable slurry of tricalcium phosphate powder.

[0029] Add sugar granules with a particle size of 100 μm (sugar granules are used as a pore-forming agent in this example) and the above-mentioned tricalcium phosphate powder in a weight ratio of 2:1 to the above-mentioned chitin slurry, and fully stir to make the sugar granules evenly dispersed in the After mud.

[0030] (2) Quickly add the mixture of sugar granules and chitin slurry into liquid paraffin, stir in a closed state, emulsify the chitin slurry containing sugar granules into spherical particles, and ...

Embodiment 3

[0033] (1) Take 15 parts by weight of Al2O3 powder under the condition of sufficient stirring, add 200 parts by weight of dimethylacetamide solvent containing 5% lithium chloride, and wait for the Al2O3 powder to be evenly suspended in After being in the solvent, add 3 parts by weight of chitin, fully stir to completely dissolve the chitin, and form a uniformly dispersed and stable slurry of aluminum oxide powder;

[0034] Mix polyvinyl alcohol particles with a particle size of 500 μm (in this example, polyvinyl alcohol particles are used as pore-forming agents) and aluminum oxide powder in a weight ratio of 5:1 and mud to form a mixture of polyvinyl alcohol particles and mud ;

[0035] (2) Quickly add the mixture of the above-mentioned polyvinyl alcohol particles and chitin mud into the edible oil, stir in an airtight state, and emulsify the chitin mud containing polyvinyl alcohol particles into spherical particles. After several hours, the particles Under the action of wate...

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PUM

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Abstract

The preparation process of porous spherical granular inorganic material includes adding chitin slurry with high inorganic powder content, dimethyl acetylamine as solvent and with or without pore creating agent into emulsifier through stirring to emulsify into sol-like spherical grain; adding water in controlled form for in-situ gelatinizing to form, filtering and washing with acetone or alcohol to eliminate emulsifier, water soluble solvent and pore creating agent to obtain porous spherical gel grain; drying to obtain initial blank, roasting, mechanical shaping and sintering to obtain product. The product has high sphericity, wide size range, narrow size distribution, controllable porous form and high mechanical performance, and may be used widely as body tissue repairing and stuffing material, tissue engineering rack material, medicine releasing carrier, filtering material, etc.

Description

Technical field [0001] The invention relates to a preparation method of a spherical particle inorganic material product with a porous structure. Background technique [0002] Due to the unique spherical three-dimensional porous structure of the porous structure spherical particle inorganic material, it has the characteristics of light weight, low density, large specific surface area, and good fluidity. The porous inorganic material with a through-hole structure also has high permeability; therefore, porous Inorganic materials with structural spherical particles are widely used in drug carrier materials, filtration and separation materials, catalyst scaffolds, bone filling materials and other special purposes. In particular, since particles with irregular shapes are likely to cause inflammatory reactions after implantation in the human body and affect the speed of bone formation, spherical particles with smooth surfaces are generally preferred to be used as materials for tiss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B38/06
Inventor 翁杰彭谦屈树新冯波卢晓英
Owner SOUTHWEST JIAOTONG UNIV
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