Antibacterial plastic wrap and preparation method thereof

Abstract

The invention discloses an antibacterial plastic wrap and a preparation method thereof. The antibacterial plastic wrap is prepared by a film forming solution using polyvinyl alcohol, corn starch and citric acid as the matrix through film casting. The film forming solution further comprises glycerin and water. Due to the fact that the citric acid is added into the mixed solution of the polyvinyl alcohol and the corn starch, ion bonding of the mixed solution and the cell membranes of bacteria occurs, the protein and cell membrane synthesizing systems in the bacteria are destroyed, bacterial reproduction is inhibited, and the plastic wrap is antibacterial.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping film, in particular to an antibacterial fresh-keeping film and a preparation method thereof. Background technique [0002] Corn starch is a natural polymer compound with the advantages of biodegradability, renewable, abundant sources and low price. Starch is a degradable natural polysaccharide macromolecular compound with rich sources, which widely exists in plants, such as corn, potatoes, sweet potatoes, sugar beets, etc. , hydrophilic, adhesive, biocompatible and biodegradable. [0003] Polyvinyl alcohol (PVA) has excellent mechanical properties and biodegradability, and is easy to form a film. It is a biodegradable synthetic polymer. The molecular structure of corn starch has certain similarities with PVA. Therefore, after corn starch is gelatinized, it is used as glue and PVA to make a mixed solution. [0004] The combination of citric acid and 80°C temperature has a good effect on k...

AI Technical Summary

Problems solved by technology

[0005] The existing plastic wrap is prepared by using polyvinyl alcohol and starch, and then the fruit is packaged with the plastic wrap...

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