Preparation method and application of injectable polysaccharide and clay composite gel
A composite gel and clay technology, which is applied in applications, pharmaceutical formulations, surgical adhesives, etc.
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Embodiment 1
[0036] Carboxymethyl chitosan / montmorillonite nanocomposite prepared by microwave intercalation reaction (in the composite, the total weight percentage of each component is respectively carboxymethyl chitosan 99%, montmorillonite 1%) Add deionized water, stir at 25°C for 0.5 hours to obtain a solution with a concentration of 0.5 mg / mL, and then concentrate by rotary evaporation at 80°C for 4 hours to obtain a composite gel with a mass concentration of 80%.
Embodiment 2
[0038] The chitosan quaternary ammonium salt / organic montmorillonite nanocomposite prepared by microwave intercalation reaction (in the composite, the total weight percentage of each component is respectively chitosan quaternary ammonium salt 80%, organic montmorillonite 20% %) was added to deionized water, stirred at 45°C for 2 hours to obtain a solution with a concentration of 1 mg / mL, and then concentrated by rotary evaporation at 60°C for 2 hours to obtain a composite gel with a mass concentration of 60%.
Embodiment 3
[0040] Carboxymethyl chitosan / rectorite nanocomposite prepared by microwave intercalation reaction (in the composite, the total weight percentage of each component is respectively carboxymethyl chitosan 90%, rectorite 10%) Add deionized water, stir at 50°C for 8 hours to obtain a solution with a concentration of 2 mg / mL, and then concentrate by rotary evaporation at 50°C for 1 hour to obtain a composite gel with a mass concentration of 50%.
[0041] figure 1 For the scanning electron micrograph of the carboxymethyl chitosan quaternary ammonium salt / organic rectorite composite gel prepared in embodiment 3, from figure 1 It can be seen that the clay particles are uniformly dispersed in the polysaccharide matrix, and the encapsulation of polysaccharides restricts the release of clay particles.
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