A kind of film-forming liquid, preparation method and application thereof

Abstract

The invention provides a film-forming solution. The film-forming solution is characterized by comprising the following components: 5-30wt% of alcohol-soluble protein, 1-5wt% of nano TiO2 particles, 0.1-3wt% of gelatinizing agent, 0.05-3wt% of coagulant aid, 0.1-3wt% of plasticizer, and the balance of ethanol water of which the volume ratio is 45-65%. The invention also provides a method for preparing the film-forming solution. Furthermore, the invention also provides application of the film-forming solution as a food preservation film. According to the film-forming solution provided by the invention, not only are the edibility, the safety and the stability of the preservation film improved due to the alcohol-soluble protein, but also the preservation film is degradable and free of pollution to the environment. The nano TiO2 particles are contained, so that the film-forming solution has unique barrier property and mechanical property after a film is formed, and has an antibacterial effect. In addition, the preparation method of the film-forming solution provided by the invention is simple in process, and low in cost. The preservation film not only is good in moisture resistance, but also does not become tacky after being moistened, is degradable, green and environment-friendly, can well keep the quality of the food, and prolongs the shelf life after being formed on the food surface.

Description

technical field [0001] The invention belongs to the field of food packaging materials, and in particular relates to a film-forming liquid with gliadin as the main raw material, a preparation method of the film-forming liquid, and an application of the film-forming liquid as a coating type edible nano antibacterial fresh-keeping film. Background technique [0002] With the improvement of people's requirements for food quality and storage period and the enhancement of people's awareness of environmental protection, edible packaging films made of natural degradable materials have become a current research hotspot. Edible film is an edible film with certain packaging protection functions. It can be used as a barrier layer to maintain food quality and extend shelf life by controlling moisture migration, oxygen ingress, fat oxidation and loss of volatile substances. The existing edible films can be roughly divided into four categories according to raw materials: polysaccharide edi...

AI Technical Summary

Problems solved by technology

The existing polysaccharide edible films and protein edible films mainly rely on intermolecular hydrogen bonds, intramolecular hydrogen bonds and special long-chain helical molecular structures to stabilize their chemical properties, but most of them are hydrophilic polymers , the moisture resistance is poor, which makes this type of film easy to absorb moisture and become sticky in a high humidity environment; although lipid edible films have good barrier properties, their film-forming properties and mechanical properties are often poor

The composite edible film can take into account the barrier properties, film-forming properties and mechanical properties of the film, but the formulation, production process and economical aspects of the composite edible film still need to be further improved