Preparation method of calcium silicate/calcium alginate hybrid material with mesoporous silica gel on surface
An alginic acid and mesoporous technology, which is applied in the field of preparation of silicic acid/calcium alginate hybrid materials, can solve the problems of large volume shrinkage, poor toughness, inconvenient use and collection of calcium silicate powder, etc. Simple, good biocompatibility results
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[0019] Example 1. A silica / calcium alginate hybrid microsphere with a surface layer containing mesoporous silica gel with a particle size of 1-40 μm
[0020] Prepare a mixed aqueous solution of sodium silicate with a mass percentage concentration of 0.5% and sodium alginate with a mass percentage concentration of 0.5%, and let stand at room temperature for 2 hours to defoam; prepare a calcium chloride aqueous solution with a mass percentage concentration of 0.5%, and filter Remove impurities.
[0021] Using ethyl cellulose with a concentration of 0.05% by mass and organic matter mixed with butyl acetate and castor oil in a volume ratio of 1:3 as the continuous phase, the mixed aqueous solution of sodium silicate and sodium alginate is dispersed into droplets under stirring. Immediately pour into the calcium chloride aqueous solution, cross-link for 0.5 hours, and rinse with deionized water 3 to 5 times to obtain a silicic acid / calcium alginate hybrid gel film. After treatment with ...
Example Embodiment
[0022] Example 2. A silicic acid / calcium alginate hybrid microsphere with a particle size of 20-100 μm containing mesoporous silica gel on the surface
[0023] Prepare a mixed aqueous solution of sodium silicate with a mass percentage concentration of 15% and sodium alginate with a mass percentage concentration of 2.5%, and let stand at room temperature for 2 hours to defoam; prepare a calcium chloride aqueous solution with a mass percentage concentration of 2.5%, and filter Remove impurities.
[0024] Using ethyl cellulose with a mass percentage concentration of 0.1% and organic matter mixed with butyl acetate and castor oil in a volume ratio of 1:3 as the continuous phase, the mixed aqueous solution of sodium silicate and sodium alginate is dispersed into droplets under stirring. Immediately pour the calcium chloride aqueous solution, cross-link for 2 hours, and rinse with deionized water 3 to 5 times to obtain a silicic acid / calcium alginate hybrid gel film. After treatment with...
Example Embodiment
[0025] Example 3. A silicic acid / calcium alginate hybrid microsphere with a particle size of 50-500 μm containing mesoporous silica gel on the surface
[0026] Prepare a mixed aqueous solution of sodium silicate with a mass percentage concentration of 15% and sodium alginate with a mass percentage concentration of 5%, and let stand at room temperature for 12 hours to defoam; prepare a calcium chloride aqueous solution with a mass percentage concentration of 10%, and filter Remove impurities.
[0027] Using ethyl cellulose with a mass percentage concentration of 0.1% and organic matter mixed with butyl acetate and castor oil in a volume ratio of 1:1 as the continuous phase, the mixed aqueous solution of sodium silicate and sodium alginate is dispersed into droplets under stirring. Immediately pour the calcium chloride aqueous solution, cross-link for 2 hours, and rinse with deionized water 3 to 5 times to obtain a silicic acid / calcium alginate hybrid gel film. After treatment with a...
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