Carboxymethyl-chitosan-starch-polyving-alcohol blending thin film

Abstract

The invention discloses a carboxymethyl-chitosan-starch-polyving-akohol blending thin film, and relates to the technical field of thin film production. The blending thin film is prepared by the following raw materials in parts by mass: 50 to 60 parts of carboxymethyl chitosan, 15 to 30 parts of starch, 15 to 30 parts of polyving alcohol, 5 to 10 parts of artemisia arenaria seed gum, 2 to 8 parts of hydroxy propyl cellulose, 3 to 6 parts of nano-silica, 5 to 10 parts of zinc stearate, 4 to 8 parts of oxidized polyethlene wax, 2 to 7 parts of ethyl silicon oil, 4 to 10 parts of glutaraldehyde and 150 to 200 parts of distilled water. The blending thin film is mainly made of the carboxymethyl chitosan, the starch and the zinc stearate with auxiliary agents, such as a plasticizing agent, a fluxing agent, a cross-linking agent and a degrading agent; not only can the excellent biodegradability of the chitosan and the starch be maintained, but also the quality of the plastic thin film can be effectively improved; moreover, the preparation method is simple and the production cost is low. Therefore, the preparation method is beneficial for industrial production.

Description

Technical field: [0001] The invention relates to the technical field of film production, in particular to a carboxymethyl chitosan-starch-polyvinyl alcohol blend film. Background technique: [0002] Chitosan is obtained by deacetylation of chitin, which exists widely in nature, and its source is second only to cellulose. It is known as "the second type of natural polymer". Chitosan has good film-forming properties, good biocompatibility with organisms, and can be biodegraded. It is widely used in food preservation, environmental treatment and medical fields. Due to the good film-forming properties, antibacterial properties and water vapor permeability of chitosan, as well as the suitable gas barrier properties after film formation, the application in the field of fresh-keeping is particularly prominent. [0003] However, in actual production and application, it is found that the films prepared only from chitosan have problems such as poor mechanical properties, high brittle...

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Problems solved by technology

[0003] However, in actual production and application, it is found that the films prepared only from chitosan have problems such as poor mechanical properties, high brittleness, and unsuitability for acidic environments.

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