Edible gelatin base film and preparation method thereof
A gelatin base film and gelatin technology, applied in the field of materials, can solve problems such as weak antibacterial properties and weak comprehensive properties, and achieve good antibacterial effect, improve mechanical properties, and rich nutrition
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[0035] The preparation method proposed in the embodiment of the present invention uses gelatin as the base. As a natural colloidal macromolecular material, gelatin has a heterogeneous protein, which is a mixture of α-chain, β-chain and γ-chain. The typical structure of gelatin molecule is Ala-Gly-Pro-Arg-Gy-Glu- 4HypGly-Pro-. Gelatin is due to its unique superior film-forming properties, biodegradability and edibility, and low cost of raw materials.
[0036] In the preparation method of the embodiment of the present invention, the components of the edible film include gel nanoparticles, bacterial cellulose nanoparticles, peanut oil, sophorose ester, etc., and each component is subjected to a special film-making process, so that the edible film The structural performance has been substantially improved.
[0037] figure 1 It is a schematic diagram of the structure of nanocellulose filled with genipin crosslinked in the embodiment of the present invention, that is, a schematic...
Embodiment 1
[0069] A gelatin base film and a preparation method thereof, comprising the steps of:
[0070] a) Preparation of gel nanoparticles
[0071] Dissolving 1 mol of gelatin in 1 L of water to obtain a gelatin solution, adding 1 L of 1 mol / L chitosan hydrochloride solution to the gelatin solution for reaction to obtain the first solution;
[0072] 1mmol concentration of 1mmol / L genipin solution was added to the first solution and reacted for 360 minutes to obtain a genipin crosslinked single-network polymer;
[0073] Using dialysis to remove excess genipin in the single-network polymer, and pulverizing the single-network polymer to obtain gel nanoparticles, the diameter of the gel nanoparticles is 400nm;
[0074] b) Preparation of bacterial cellulose nanoparticles
[0075] Under liquid nitrogen freezing conditions (-197°C), the bacterial cellulose is ground into bacterial cellulose nanoparticles with a diameter of 0-500nm;
[0076] c) Preparation of gelatin base film
[0077] St...
Embodiment 2
[0080] A gelatin base film and a preparation method thereof, comprising the steps of:
[0081] a) preparing gel nanoparticles, specifically:
[0082] Dissolving 1 mol of gelatin in 1 L of water to obtain a gelatin solution, adding 1 L of 1 mol / L chitosan hydrochloride solution to the gelatin solution for reaction to obtain the first solution;
[0083] 5mmol concentration of 5mmol / L genipin solution was added to the first solution and reacted for 700 minutes to obtain a genipin crosslinked single-network polymer;
[0084] The redundant genipin in the single-network polymer is removed by dialysis, and the single-network polymer is pulverized to obtain gel nanoparticles, and the diameter of the gel nanoparticles is 300 nm.
[0085] b) Preparation of bacterial cellulose nanoparticles
[0086] Under the freezing condition of liquid nitrogen, the bacterial cellulose is ground into bacterial cellulose nanoparticles, and the diameter of the bacterial cellulose nanoparticle is 0-400n...
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Abstract
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