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Antibacterial pullulan/chitosan composite food packaging film and preparation method thereof

The technology of pullulan polysaccharide and polyaldehyde pullulan polysaccharide is applied in the field of pullulan polysaccharide/chitosan composite food packaging film and its preparation, and can solve the problem of lack of antibacterial biological activity, easy spoilage, and food shelf life. Shortage and other problems, to achieve the effect of synergistic antibacterial biological activity, excellent light blocking performance, and high biocompatibility

Active Publication Date: 2018-09-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the antibacterial biological activity that the natural structure of pullulan polysaccharide itself does not possess, which leads to the problems that the food shelf life is short and easy to spoil when it is used to prepare food packaging films, and an antibacterial pullulan is provided Polysaccharide / chitosan composite food packaging film and preparation method thereof

Method used

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  • Antibacterial pullulan/chitosan composite food packaging film and preparation method thereof
  • Antibacterial pullulan/chitosan composite food packaging film and preparation method thereof
  • Antibacterial pullulan/chitosan composite food packaging film and preparation method thereof

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specific Embodiment approach 1

[0028]Specific embodiment one: This embodiment is an antibacterial pullulan / chitosan composite food packaging film, which uses pullulan as a raw material, first utilizes sodium periodate to oxidize pullulan to obtain polyaldehyde Pullulan; then use adipic acid dihydrazide to reductively aminate polyaldehyde pullulan to obtain adipic acid dihydrazide aminated polyaldehyde pullulan; finally use adipic acid dihydrazide to aminate the polyaldehyde pullulan Polyaldehyde pullulan polysaccharide is mixed with natural bioactive antibacterial agent to obtain antibacterial pullulan / chitosan mixed solution, and the antibacterial pullulan / chitosan mixed solution is made into antibacterial pullulan by solution casting method Lantosan / chitosan food packaging film.

[0029] In recent years, the research on pullulan polysaccharide film material has become a new star in the field of food safety and food biochemical research, but in the research of various pullulan polysaccharide blend film mat...

specific Embodiment approach 2

[0030] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the molecular weight of the pullulan is 800,000-4,800,000. Others are the same as the first embodiment.

specific Embodiment approach 3

[0031] Specific embodiment three: This embodiment is a preparation method of an antibacterial pullulan / chitosan composite food packaging film, which is specifically completed according to the following steps:

[0032] One, oxidation: ①, pullulan polysaccharide is dissolved in distilled water, obtains pullulan polysaccharide aqueous solution, the concentration of described pullulan polysaccharide aqueous solution is 5mmol / L~20mmol / L; Sodium iodate is dissolved in distilled water to obtain sodium periodate aqueous solution, the concentration of described sodium periodate aqueous solution is 0.33mol / L~0.66mol / L; ③, under dark conditions, pullulan aqueous solution and high The sodium iodate aqueous solution was mixed, and stirred at a speed of 600r / min to 1000r / min for 4h to 8h at room temperature and protected from light to obtain a reaction product, and the volume ratio of the pullulan aqueous solution to the sodium periodate aqueous solution was ( 3~5): 1; ④, transfer the react...

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Abstract

The invention discloses an antibacterial pullulan / chitosan composite food packaging film and a preparation method thereof, belongs to the field of food packaging, particularly relates to a pullulan / chitosan composite food packaging film and a preparation method thereof and aims to solve the problems that the food shelf life is shorter and spoilage is easily caused when pullulan is used for preparing the food packaging film because of absence of antibacterial bioactivity of a natural structure of pullulan. The antibacterial pullulan / chitosan composite food packaging film takes pullulan as a rawmaterial, and sodium periodate is firstly used for oxidation; then, adipic dihydrazide is used for reduction and amination; then, a product is mixed with a natural bioactive antibacterial agent, andfinally, the film is formed. The preparation method of the antibacterial pullulan / chitosan composite food packaging film comprises steps as follows: 1) oxidation; 2) reduction and amination and 3) composite flow casting for film preparation. The prepared antibacterial pullulan / chitosan composite film is used as a novel food inner package.

Description

technical field [0001] The invention belongs to the field of food packaging, and in particular relates to a pullulan / chitosan composite food packaging film and a preparation method thereof. Background technique [0002] Food safety is one of the major strategic issues related to human health and life safety, which has attracted widespread attention from governments and scholars at home and abroad. Microbial contamination and food self-oxidation are the main causes of food safety problems. Among them, food packaging can prolong the shelf life of food and protect food quality and safety. At present, the main product in the food packaging market is petroleum-based polymer raw material food packaging film, but it has a series of problems such as not easy to degrade, high infiltration toxicity, and low biocompatibility, which cannot be more fully and effectively guaranteed. To improve and respond to supply demand, the rapid research and development of new natural, safe, low-toxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08L5/02C08J5/18C08B37/02
CPCC08B37/0018C08J5/18C08J2305/08C08J2405/00
Inventor 王路于雪梅王振宇张颖
Owner HARBIN INST OF TECH
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