Preparation of PVA/cassava starch/LAE/anthocyanin intelligent color-developing active composite membrane and application of composite membrane in packaging bacteriostasis

A technology of tapioca starch and anthocyanin, which is applied in the field of food packaging materials, can solve the problems such as incomplete performance impact, and achieve good color rendering effect, low ultraviolet transmittance, and increased water vapor transmittance.
CN113337014APending Publication Date: 2021-09-03GUANGXI UNIV FOR NATITIES
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI UNIV FOR NATITIES
Publication Date
2021-09-03

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Abstract

The invention provides preparation of a PVA / cassava starch / LAE / anthocyanin intelligent color-developing active composite membrane and application of the composite membrane in packaging bacteriostasis, and belongs to the technical field of food packaging materials. The cassava starch is gelatinized and then mixed with a PVA solution and glycerin, LAE accounting for 1-5% of the total mass and anthocyanin accounting for 5-50% of the total mass are added, the mixture is heated, stirred and mixed in a water bath environment, a membrane casting solution is obtained, and finally, tape casting is carried out on the membrane casting solution to obtain a finished product of the composite membrane. The composite membrane disclosed by the invention can better prevent ultraviolet rays and visible light from penetrating, and is beneficial to preventing food from being degraded and oxidized; the obtained composite membrane has relatively high water absorption rate and water vapor transmission rate, and has a relatively good fresh-keeping effect; and the composite membrane can present different colors under different pH value conditions, is safe in components and free of toxic and harmful effects, and can enable the freshness of packaged food to be intuitive.
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Description

technical field

[0001] The invention belongs to the technical field of food packaging materials, and in particular relates to the preparation of a PVA / tapioca starch / LA / anthocyanin intelligent color-developing active composite film and its application in packaging antibacterial aspects. Background technique

[0002] Smart packaging is a new type of food packaging. Consumers can evaluate the quality and freshness of food through its color change. European law defines it as a material and item that detects the condition of packaged food or the surrounding environment of food. When the food deteriorates, the pH value will change. Adding the pH indicator to the packaging material can realize real-time monitoring of the quality and freshness of the food in the package. pH indicators include chlorophenol red, bromophenol blue, bromocresol blue, and bromocresol green, etc., but these synthetic chemical reagents have potential impacts on human health, so they should be avoided in th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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