Nanofiber antibacterial fruit and vegetable fresh-keeping film with porous structure, preparation method and application

Abstract

The invention discloses a nano-fiber anti-microbial fruit-vegetable preservative film with a porous structure, and a preparation method and application. According to the invention, myoporum bontioides leaves are grinded into powder and treated by supercritical extraction, so that a myoporum bontioides extract is obtained; a water solution containing TWEEN-80 is added into the myoporum bontioides extract, and the mixture is filtered, so that a myoporum bontioides supercritical extract solution is obtained; the myoporum bontioides supercritical extract solution, a polyvinyl alcohol solution, a chitosan derivative solution and a nano-titania solution are mixed, so that a mixed spinning solution is obtained; and the mixed spinning solution is treated by spinning of a static spinning machine, so that the nano-fiber anti-microbial fruit-vegetable preservative film with the porous structure is obtained. The preservative film has the advantages of a large specific area, a high porosity, high finger uniformity, good mechanical properties and the like, also has performance such as a good moisture permeable and gas permeable property and a good moldproof and anti-microbial property, and has high application potential in the food packaging field.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a nanofiber antibacterial fruit and vegetable fresh-keeping film with a porous structure, a preparation method and application thereof. Background technique [0002] my country's food industry has been facing a problem, that is, food preservation. In order to ensure the stability of food during storage, it is often necessary to add a large amount of preservatives to food, which brings great safety hazards to food. The use of antibacterial packaging film can not only reduce or avoid the direct addition of preservatives in the process of food processing and storage, but also improve the stability of food storage. Food antibacterial packaging technology represents the future development direction of food anti-corrosion packaging industry. Actively developing this technology will undoubtedly play a great role in promoting the rapid development of my country's...

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Problems solved by technology

In addition, the electrospinning process is simple and the conditions are mild, and many functional substances can be added to the spinning solution, so that the prepared materials have a wide range of uses. At present, they are mainly used in biomedicine, membrane filtration, electrode materials and other fields. There are few applications in the field of food packaging, and the publication number 104277389A involves a nano-α-Fe 2 o 3 Functionally modified polyvinyl alcohol (PVA)-based composite coating fresh-keeping packaging material and its preparation method have visible light catalytic antibacterial and fresh-keeping effects; however, chitosan derivatives / polyvinyl alcohol and effective plant antibacterial components are blended to prepare nano Water-absorbing and antibacterial packaging materials have not yet been reported

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