A kind of intelligent hydrogel processing method with nano-starch particles as the skeleton
A processing method and hydrogel technology, applied in the direction of nanotechnology, can solve the problems of toxicity, cumbersome process, and inability to enzymatically degrade, and achieve the effects of easy operation, controllable reaction conditions, and improved bioavailability
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Embodiment 1
[0031] 10.0 mg of nano-starch particles were dissolved in Tris-HCl buffer solution (50 mmol / L, pH 7.0) to prepare a homogeneous solution with a mass concentration of 0.2%. Gelling reaction: the solution was sonicated for 15 minutes, then 50 mg of glucosyl donor molecules and 80 U of glycosyltransferase were added, stirred evenly, and reacted at a constant temperature of 40° C. for 24 hours. Place it at room temperature for 6h to cool, and let it stand to form a gel. The gel strength of the smart hydrogel is above 235.67g. The release rate of nutrient components through enzymatic reaction reaches 98.2%. Repeated washing with distilled water and freeze-drying can obtain xerogel. The xerogel can be re-coagulated after absorbing water, and the number of repeated gelation can reach 5 times.
[0032] Wherein, the assay method of gel strength: use physical property analyzer to hydrogel gel strength analysis; Phosphate buffered saline solution at pH 7.0, 290units / ml of α-amylase, ...
Embodiment 2
[0038] 10.0 mg of nano-starch particles were dissolved in Tris-HCl buffer solution (50 mmol / L, pH 7.0) to prepare a homogeneous solution with a mass concentration of 0.5%. Gelling reaction: the solution was sonicated for 20 minutes, and then 80 mg of glucose-based donor molecules and 100 U of glycosyltransferase were added, stirred evenly, and reacted at a constant temperature of 40° C. for 24 hours. Place it at room temperature for 6h to cool, and let it stand to form a gel. The gel strength of the smart hydrogel reaches 358.38g. The release rate of nutrient components through enzymatic reaction reaches 97.7%. Repeated washing with distilled water and freeze-drying can obtain xerogel. The xerogel can be re-coagulated after absorbing water, and the number of repeated gelation can reach 5 times.
Embodiment 3
[0040] 10.0 mg of nano-starch particles were dissolved in Tris-HCl buffer solution (50 mmol / L, pH 7.0) to prepare a homogeneous solution with a mass concentration of 1.0%. Gelling reaction: the solution was sonicated for 30 minutes, and then 100 mg of glucose-based donor molecules and 200 U of glycosyltransferase were added, stirred evenly, and reacted at a constant temperature of 40° C. for 24 hours. Place it at room temperature for 6h to cool, and let it stand to form a gel. The gel strength of the smart hydrogel reaches 397.21g. The release rate of nutrient components through enzymatic reaction reaches 97.1%. Repeated washing with distilled water and freeze-drying can obtain xerogel. The dry gel can be re-coagulated after absorbing water, and the number of repeated gelation can reach 6 times.
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