Nanoscale spherical bioactive glass and preparation method thereof
A bioactive glass, nano-scale technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve problems such as obvious agglomeration, easy agglomeration, and incomplete spherical shape, and achieve simple operation, cheap and easy-to-obtain raw materials, and reaction The effect of mild conditions
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[0043] The preparation method is mainly divided into two steps: first, dissolve the triblock polymer P123 and CTAB in a mixed solvent of water and ethanol and stir evenly, then add 28% ammonia water to adjust the pH value of the mixed solution, and then add silicon source respectively , calcium source and phosphorus source, stirred to obtain a sol-like liquid; finally, the sol-like liquid was washed and dried, and treated at a high temperature in a high-temperature furnace for a period of time to obtain nano-scale spherical bioactive glass with small particle size, high specific surface area and porosity .
[0044] The principle of preparing spherical bioglass in the present invention is mainly: the silicon source is hydrolyzed under alkaline conditions to form a spherical silicon-oxygen network, and calcium and phosphorus are combined with a large amount of Si-OH on the silicon-oxygen network to realize the incorporation of calcium and phosphorus; The organic matter is remove...
Embodiment 1
[0063] The preparation method of a nanoscale spherical bioactive glass provided in this embodiment comprises the following steps:
[0064] (1) First, add 0.75g of P123 and 0.02g of CTAB to a solvent of 40ml of absolute ethanol and 10ml of distilled water and stir at 40°C for 12h to completely dissolve it to obtain a mixed solution;
[0065] Add 0.33ml of 28% ammonia water to the mixed solution, and the pH is about 9 to obtain an alkaline mixed solution.
[0066] (2) Add 2.2ml tetraethyl orthosilicate to the alkaline mixed solution obtained in step 1), stir at 40°C for 1 hour at a stirring speed of 1000rpm, and obtain solution 1 after stirring;
[0067] Add 1.41g of calcium nitrate tetrahydrate into solution 1, stir at 40°C for 30 minutes, and the stirring speed is 500rpm, and obtain solution 2 after stirring;
[0068] Add 0.1ml of orthophosphoric acid into solution 2, stir at 40° C. for 12 hours at a stirring speed of 500 rpm, and obtain a bioactive glass sol-like liquid afte...
Embodiment 2
[0073] The preparation method of a nanoscale spherical bioactive glass provided in this embodiment comprises the following steps:
[0074] (1) First, add 0.75g of P123 and 0.005g of CTAB to a solvent of 40ml of absolute ethanol and 10ml of distilled water and stir at 40°C for 12h to completely dissolve to obtain a mixed solution;
[0075] Add 0.33ml of 28% ammonia water to the mixed solution, and the pH is about 9 to obtain an alkaline mixed solution.
[0076] (2) Add 2.2ml tetraethyl orthosilicate to the alkaline mixed solution obtained in step 1), stir at 40°C for 1 hour at a stirring speed of 1000rpm, and obtain solution 1 after stirring;
[0077] Add 1.41g of calcium nitrate tetrahydrate into solution 1, stir at 40°C for 30 minutes, and the stirring speed is 500rpm, and obtain solution 2 after stirring;
[0078] Add 0.1ml of orthophosphoric acid into solution 2, stir at 40° C. for 12 hours at a stirring speed of 500 rpm, and obtain a bioactive glass sol-like liquid after ...
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