Antimicrobial moisturizing degradable porous gel preservative film and preparation method and application thereof

Abstract

The invention relates to an antimicrobial moisturizing degradable porous gel preservative film and a preparation method and application thereof. The gel preservative film is formed by polymerizing a carboxyl or amido contained functional monomer, an inorganic nano-powder, biodegradable natural polymer, calcium-ion-contained salt, an inorganic antimicrobial agent and a reductant-oxidant in a water solution. A gel three-dimensional network porous structure is used for spontaneously adjusting gas components inside the film, and the natural polymer is adopted, so that the antimicrobial moisturizing degradable porous gel preservative film has the advantages of being wide in source, biologically degradable, good in film forming property and the like; due to the high antimicrobial property of the inorganic antimicrobial agent, the defects that a traditional preservative film is high in pollution, short in storage period, high in cost, hard to recycle, complex in technology and the like are avoided, and the antimicrobial moisturizing degradable porous gel preservative film can partially replace cardboards, water absorption sponges, ice blocks or plastics and other preservative materials. The preparation method is easy and convenient to implement, capable of promoting large-scale production, long in preservation time, good in permeability, and capable of effectively slowing down the food rotting speed, thereby being applied to food, fruit, vegetable transportation, storage, delivery, assembling, disassembling, storage and preservation in the edible process.

Description

technical field [0001] The invention relates to the fields of food safety and preservation, polymer materials and environmental protection, in particular to an antibacterial, moisturizing and degradable porous gel preservation film, a preparation method and application thereof. Background technique [0002] With the improvement of people's living standards, food safety and food preservation issues are getting more and more attention. In the process of food production, the performance of packaging materials or supporting materials often has a great influence on the shelf life of food. Among the existing packaging films in our country, the vast majority are processed from polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC) and polyester. These products are of high quality, light in weight and easy to process. , low cost, but because it contains chemical substances such as phthalates and di(2-ethyl)hexyl adipate (DEHA) that may cause cancer, and cannot be degraded ...

AI Technical Summary

Problems solved by technology

[0007] Traditional preservative film preparation methods are generally difficult and costly, and some chemical preservatives may even endanger human health

Some PVC cling film wraps a plate of raw or cooked food, and a large area of ​​the food will be close to the soft plastic cling film. The content of vinyl chloride monomer in the cling film is relatively high, which is easy to release, and it is added during the film making process. The plasticizer DEHA and pigments, after a long time of direct contact with food, are more likely to penetrate into the food and enter the human body to endanger health, especially after being heated by microwave or low-temperature freezing, this process will be accelerated.