Walnut peptide-chitosan-sodium alginate composite film and its preparation method and application
A sodium alginate film and sodium alginate technology, applied in the field of edible films, can solve problems affecting the performance of composite films, adverse reactions of ingredients, etc., and achieve the effect of improving barrier properties and mechanical properties
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Embodiment 1
[0054] 1. Preparation of Sodium Alginate Monolayer Membrane
[0055] Weigh 1.50g of sodium alginate, slowly add sodium alginate into 100mL of distilled water while stirring, magnetically stir in a water bath at 40°C for 1h until it is completely dissolved, then add 2mL of glycerin, stir evenly to make a 100mL membrane solution, put into ultrasonic Degassed in a washer for 10 minutes, set aside. Pour 15g of sodium alginate solution into a plastic petri dish with a diameter of 90mm, spread it evenly, and then place it in a constant temperature blast drying oven at 30°C for 24 hours to form a film.
[0056] 2. Preparation of Chitosan-Walnut Peptide Covalent Complex
[0057] Weigh 1.5 g of chitosan powder and dissolve it in 1% (v / v, %) acetic acid solution, and magnetically stir until completely dissolved. Weigh 0.5g of walnut peptide powder and dissolve in distilled water, and stir magnetically in a water bath at 60°C for 30min. The walnut peptide aqueous solution was mixed wi...
Embodiment 2
[0061] 1. Preparation of Sodium Alginate Monolayer Membrane
[0062] Weigh 1.50g of sodium alginate, slowly add sodium alginate into 100mL of distilled water while stirring, magnetically stir in a water bath at 40°C for 1h until it is completely dissolved, then add 2mL of glycerin, stir evenly to make a 100mL membrane solution, put into ultrasonic Degassed in a washer for 10 minutes, set aside. Pour 15g of sodium alginate solution into a plastic petri dish with a diameter of 90mm, spread it evenly, and then place it in a constant temperature blast drying oven at 30°C for 24 hours to form a film.
[0063] 2. Preparation of Chitosan-Walnut Peptide Covalent Complex
[0064] Weigh 1 g of chitosan powder and dissolve it in 1% (v / v, %) acetic acid solution, and magnetically stir until completely dissolved. Weigh 1g of walnut peptide powder and dissolve it in distilled water, and magnetically stir in a water bath at 60°C for 30min. The walnut peptide aqueous solution was mixed wit...
Embodiment 3
[0068] 1. Preparation of Sodium Alginate Monolayer Membrane
[0069] Weigh 1.50g of sodium alginate, slowly add sodium alginate into 100mL of distilled water while stirring, magnetically stir in a water bath at 40°C for 1h until it is completely dissolved, then add 2mL of glycerin, stir evenly to make a 100mL membrane solution, put into ultrasonic Degassed in a washer for 10 minutes, set aside. Pour 15g of sodium alginate solution into a plastic petri dish with a diameter of 90mm, spread it evenly, and then place it in a constant temperature blast drying oven at 30°C for 24 hours to form a film.
[0070] 2. Preparation of Chitosan-Walnut Peptide Covalent Complex
[0071] Weigh 0.5 g of chitosan powder and dissolve it in 1% (v / v, %) acetic acid solution, and magnetically stir until completely dissolved. Weigh 1.5g of walnut peptide powder and dissolve in distilled water, and stir magnetically in a water bath at 60°C for 30min. The walnut peptide aqueous solution was mixed wi...
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