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Preparation method of antibacterial and fresh-keeping composite packaging film

A composite packaging and film technology, applied in packaging, wrapping paper, biological packaging, etc., can solve the problems of low photocatalytic rate and insignificant antibacterial and fresh-keeping effect

Active Publication Date: 2013-11-27
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is to solve the problem of nano TiO in the existing antibacterial packaging film 2 To solve the problems of low photocatalytic rate and insignificant antibacterial and fresh-keeping effect, a preparation method of antibacterial and fresh-keeping composite packaging film is provided

Method used

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  • Preparation method of antibacterial and fresh-keeping composite packaging film
  • Preparation method of antibacterial and fresh-keeping composite packaging film

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specific Embodiment approach 1

[0013] Specific embodiment one: the preparation method of a kind of antibacterial and fresh-keeping composite packaging film of this embodiment is to carry out through the following steps:

[0014] One, dissolve chitosan: get chitosan and dissolve in solvent A, obtain the chitosan solution that mass concentration is 15~25g / L;

[0015] 2. Nanomaterial powder modification: add nanomaterials to water, adjust the pH to 5.0, then add sodium laurate with a mass concentration of 11g / L, react at a temperature of 40°C for 30min, filter, and collect the solid phase , then washed, dried, and ground to obtain the modified nanomaterial powder; wherein the mass volume ratio of the nanomaterial to water is 1g: 14mL; the mass ratio of the nanomaterial to sodium laurate is (6-7): 1;

[0016] 3. Adding nanomaterials: Add the modified nanomaterial powder into the chitosan solution to obtain nanomaterial chitosan with a mass concentration of the modified nanomaterial powder of 0.1g / L~0.5g / L suga...

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the nano-material is nano-TiO 2 . Others are the same as the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the metal ion-containing compound described in step 4 is AgNO with a mass concentration of 0.10moL / L 3 solution. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method of an antibacterial and fresh-keeping composite packaging film and relates to a preparation method of a composite packaging film. The composite packaging film provided by the invention is used for solving the problems that the existing antibacterial packaging film is low in nano TiO2 photocatalysis efficiency and inapparent in antibacterial and fresh-keeping effect. The preparation method of the antibacterial and fresh-keeping composite packaging film comprises the following steps of: firstly, dissolving chitosan; secondly, modifying a nano material by adopting powder; thirdly, adding the nano material; fourthly, adding metal ions, thus the preparation method of the composite packaging film with a fresh-keeping function is completed. The preparation method is simple and practicable, Ag exists in an ion form, a uniform film can be easily prepared, and the prepared film is degradable, good in fresh-keeping function and low in cost. The preparation method of the antibacterial and fresh-keeping composite packaging film is applied to the field of antibacterial packaging.

Description

technical field [0001] The invention relates to a preparation method of a composite packaging film. Background technique [0002] Chitosan is a natural antibacterial agent, and the film is resistant to O 2 , CO 2 、C 2 h 4 It has a certain selective osmosis, is safe, non-toxic, cheap, has good biocompatibility and degradability, and has been widely used in the field of food preservation. It can slow down the consumption of nutrients, delay the ripening of fruits, and reduce the rate of fruit decay. However, when chitosan forms a film alone, its wet mechanical strength is poor, and the strength and toughness of the film are not enough, and it is easy to break and break after a period of time. Therefore, many scholars have modified chitosan to improve the mechanical properties, moisture retention and antibacterial properties of chitosan films, and enhance the fresh-keeping performance of chitosan composite films. [0003] Nano-TiO 2 It is the most actively researched ino...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/08C08K9/04C08K3/22C08K3/08B65D65/38
CPCY02W90/10
Inventor 徐淑艳张铭君刘瑞麟
Owner NORTHEAST FORESTRY UNIVERSITY
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