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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

Inactive Publication Date: 2012-07-11
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the technical problem to be solved by the present invention is that the use and collection of calcium silicate powder with a silica gel layer structure on the surface is inconvenient, poor toughness, and simple calcium alginate hydrogel is easy to swell and shrink in volume after drying high rate issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1. A silicic acid / calcium alginate hybrid microsphere with a particle size of 1-40 μm containing mesoporous silica gel on the surface

[0020] Prepare a mixed aqueous solution of 0.5% sodium silicate and 0.5% sodium alginate at room temperature for defoaming; prepare a 0.5% calcium chloride aqueous solution, filter Remove impurities.

[0021] The mass percentage concentration of ethyl cellulose is 0.05%, and the organic matter mixed with butyl acetate and castor oil according to the volume ratio of 1:3 is used as the continuous phase, and the mixed aqueous solution of sodium silicate and sodium alginate is dispersed into droplets under stirring, Immediately pour calcium chloride aqueous solution, cross-link for 0.5 hours, rinse with deionized water for 3 to 5 times to obtain a silicic acid / calcium alginate hybrid gel film, and treat it with a hydrochloric acid aqueous solution with a pH value of 1 to obtain a surface with medium Silicic acid / calcium alginate hy...

Embodiment 2

[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 a mass percentage concentration of 2.5% sodium alginate, and let stand at room temperature for 2 hours for defoaming; prepare a mass percentage concentration of 2.5% calcium chloride aqueous solution, filter Remove impurities.

[0024] The mass percent concentration of ethyl cellulose is 0.1%, and the organic matter mixed with butyl acetate and castor oil according to the volume ratio of 1:3 is used as the continuous phase, and the mixed aqueous solution of sodium silicate and sodium alginate is dispersed into droplets under stirring, Immediately pour calcium chloride aqueous solution, cross-link for 2 hours, rinse with deionized water for 3 to 5 times to obtain a silicic acid / calcium alginate hybrid gel film, and treat i...

Embodiment 3

[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 with a mass percentage concentration of 15% sodium silicate and a mass percentage concentration of 5% sodium alginate, and let stand at room temperature for 12 hours for defoaming; prepare a 10% mass percentage concentration of calcium chloride aqueous solution, filter Remove impurities.

[0027] The mass percent concentration of ethyl cellulose is 0.1%, and the organic matter mixed with butyl acetate and castor oil according to the volume ratio of 1:1 is used as the continuous phase, and the mixed aqueous solution of sodium silicate and sodium alginate is dispersed into droplets under stirring, Immediately pour calcium chloride aqueous solution, cross-link for 2 hours, rinse with deionized water for 3 to 5 times to obtain a silicic acid / calcium alginate hybrid gel film, and treat it wit...

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Abstract

The invention provides a preparation method of a calcium silicate / calcium alginate hybrid material with mesoporous silica gel on a surface, which comprises the following steps of: preparing mixed solution of sodium silicate with the mass percentage concentration of 0.5-15 percent and sodium alginate with the mass percentage concentration of 0.1-10 percent, keeping static to remove foam, preparingcalcium chloride solution with the mass percentage concentration of 0.5-10 percent, preparing drops or a film of mixed solution of sodium silicate and sodium alginate via suspension and dispersion orfilm wiping, adding the mixed solution into the calcium chloride solution, cross-linking for 0.5-2h, washing three to five times with deionized water to prepare microspheres or a film material of calcium silicate / calcium alginate hybrid gel, preparing solution with the pH value of 0.1-6.5 using hydrochloric acid, and soaking the prepared calcium silicate / calcium alginate hybrid gel in the prepared solution for 0.5-12h, thereby obtaining the microspheres or the film material of the calcium silicate / calcium alginate hybrid gel with the mesoporous silica gel on the surface.

Description

technical field [0001] The invention relates to a preparation method of a silicic acid / calcium alginate hybrid material containing mesoporous silica gel on the surface, and belongs to the field of functional materials. Background technique [0002] The molecular formula of silica gel is mSiO 2 ·nH 2 O, is a highly active adsorption material, insoluble in water and any solvent, non-toxic, tasteless, stable in chemical properties, and does not react with any substance except strong alkali and hydrofluoric acid. Various types of silica gel form different pore structures due to their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that other similar materials cannot replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Mesoporous silica gel prepared with various surfactants and ionic liquids as templates has been widely us...

Claims

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Application Information

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IPC IPC(8): C08J9/26C08J3/24C08J7/12C08J3/16C08L5/04C08K3/34C08K3/16
Inventor 赵孔银魏俊富李东英李嘉杰季舒骏
Owner TIANJIN POLYTECHNIC UNIV
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