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Preparation method for applying urea and polyethylene glycol blend to bioactive glass bone repair material pore-forming process

A bioactive glass, polyethylene glycol technology, applied in the field of medical materials, can solve the problems of urea not having adhesion and lubricity, easy to loosen, etc., to achieve the effect of increasing lubricity, easier separation, and avoiding loosening

Inactive Publication Date: 2014-05-14
邝大军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, urea does not have the characteristics of adhesiveness and lubricity, and it is easy to loosen after being pressed out during the pressing molding process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mix the powdered bioactive glass with urea and polyethylene glycol at a ratio of 70% for bioactive glass, 22% for urea, and 8% for polyethylene glycol, and then use a strip sampler to press out strips of specified size. Shaped material; calcined and formed in a temperature program controlled box-type resistance furnace. During the process of calcined and formed, the high-temperature calciner set the operating parameters as an initial temperature of 30°C, a heating temperature of 180°C, a time of 180min, and a holding time of 60min; then the temperature was raised to 380°C, time 30min, heat preservation 30min; then raise the temperature to 750°C, time 30min, heat preservation 30min, then stop heating, and the room temperature is cooled with the electric furnace to form a rigid strip-shaped porous material with a size of 8mm*8mm*20mm.

Embodiment 2

[0037] Mix powdered bioactive glass with urea and polyethylene glycol at a ratio of 72% for bioactive glass, 19% for urea, and 9% for polyethylene glycol, and then use a strip sampler to press out strips of specified size. Shaped material; calcined and formed in a temperature program controlled box-type resistance furnace. During the process of calcined and formed, the operating parameters of the high-temperature calciner are set to an initial temperature of 26°C, a heating temperature of 200°C, a time of 150 minutes, and a holding time of 70 minutes; then the temperature is raised to 370°C, time 40min, heat preservation 35min; then raise the temperature to 850°C, time 40min, heat preservation 40min, then stop heating, and the room temperature is cooled with the electric furnace to form a rigid strip-shaped porous material with a size of 12mm*12mm*28mm.

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Abstract

The invention discloses a preparation method for applying a urea and polyethylene glycol blend to a bioactive glass bone repair material pore-forming process. The preparation method comprises the following steps: mixing powdery bioactive glass, urea and polyethylene glycol according to a ratio; pressing and molding; carrying out heat treatment in a programmed temperature control box type resistance furnace at 20-850 DEG C for 240-480 minutes to prepare the inorganic amorphous-state bioactive glass bone repair material. According to the preparation method, compared with a process of independently taking the urea as a pore-forming agent, the urea and polyethylene glycol blend is used as the pore-forming agent; the calcined bioactive glass material is high in porosity and good in pore diameter uniformity and the shape of the material is not easy to deform.

Description

technical field [0001] The invention mainly relates to the field of medical materials, in particular to a preparation method for applying a urea and polyethylene glycol blend to a pore-making process for bioactive glass bone repair materials. Background technique [0002] Among the existing pore-forming technologies, pore-forming agents are widely used for ceramic products, and materials such as polyvinyl alcohol, carboxymethyl cellulose, benzoic acid, ammonium bicarbonate, and urea are commonly used. [0003] There are only a few companies that use bioactive glass materials clinically in China, and some of them are research inventions carried out by scientific research institutes. In similar technologies, there is currently an invention by Professor Chen Xiaofeng of South China University of Technology to make pores for bioactive glass materials, which uses urea as a pore-forming agent alone: ​​since urea is gradually gasified and decomposed when it is higher than 150 ° C, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C11/00A61L27/10A61L27/56
Inventor 邝大军
Owner 邝大军
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