Antimicrobial packaging film with intelligent controlled-release performance, and preparation method and application thereof

A technology of intelligent controlled release and packaging film, applied in application, food preservation, food science, etc., can solve the problems of inactivation of antibacterial agents, decline of physical and mechanical properties, and prone to violent release, so as to ensure safety and quality and solve related problems. Capacitance problem, the effect of solving high temperature deactivation

Active Publication Date: 2016-09-28
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are usually three disadvantages in the above preparation methods: one is that the high temperature in the film-forming process can easily lead to the inactivation of t

Method used

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  • Antimicrobial packaging film with intelligent controlled-release performance, and preparation method and application thereof
  • Antimicrobial packaging film with intelligent controlled-release performance, and preparation method and application thereof
  • Antimicrobial packaging film with intelligent controlled-release performance, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The aldehyde-containing nanospheres with core-shell structure with adjustable particle size provided in this example have a particle diameter of 173 nm and a dispersion of 0.2. The core monomer of the aldehyde-containing nanospheres It is styrene, and the shell monomer is 4-vinylbenzaldehyde VBA, wherein the mass ratio of the core monomer and the shell monomer is 4:1.

[0055] The preparation method of the aldehyde-containing nano-microspheres with a core-shell structure with adjustable particle size is as follows:

[0056] (1) Screening and preparation of emulsifiers and initiators

[0057] Among the amphoteric emulsifiers, DNS-86, DNS-268 and DNS-458 are commonly used, but when the former two are used for polymerization, the obtained microspheres are unstable and easy to aggregate, which may be caused by incomplete emulsification. In view of this , choose DNS-458 (purchased from Guangzhou Double Bond Trading Co., Ltd., here is only for enumeration, without limitation...

Embodiment 2

[0069] The aldehyde-containing nanospheres with a core-shell structure with adjustable particle size provided in this example have a particle diameter of about 300 nm and a dispersion of 0.202. The core sheet of the aldehyde-containing nanospheres The body is styrene, and the shell monomer is 4-vinylbenzaldehyde VBA and styrene St, wherein the mass ratio of the core monomer and the shell monomer is 4:1, and the 4-vinylbenzaldehyde VBA in the shell monomer The mass ratio of styrene St is 1:3.

[0070] The preparation method of the aldehyde-containing nano-microspheres with core-shell structure with adjustable particle size is different from Example 1 in that:

[0071] The amount of the cross-linking monomer is 0.5% of the total mass of the core monomer and the shell monomer.

[0072] The consumption of emulsifier is 5% of the total mass of core monomer and shell monomer, wherein in the core emulsion, the consumption of cross-linking monomer is 82% of the total mass of cross-li...

Embodiment 3

[0080] The aldehyde-containing nanospheres with a core-shell structure with adjustable particle size provided in this example have a particle diameter of about 120 nm and a dispersion of 0.15. The core sheet of the aldehyde-containing nanospheres The body is styrene, and the shell monomer is 4-vinylbenzaldehyde VBA and styrene St, wherein the mass ratio of the core monomer and the shell monomer is 4:1, and the 4-vinylbenzaldehyde VBA in the shell monomer The ratio of mass parts to styrene St is 3:1.

[0081] The preparation method of the aldehyde-containing nano-microspheres with core-shell structure with adjustable particle size is different from Example 1 in that:

[0082] The amount of the cross-linking monomer is 1.5% of the total mass of the core monomer and the shell monomer.

[0083] The consumption of emulsifier is 3% of the total mass of core monomer and shell monomer; Wherein in core emulsion, the consumption of cross-linking monomer is 78% of the total mass of cros...

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Abstract

The invention discloses a preparation method of an antimicrobial packaging film with intelligent controlled-release performance. The preparation method comprises the following steps: (a) taking polyvinyl alcohol, and dissolving the polyvinyl alcohol in deionized water to prepare a polyvinyl alcohol film solution; (b) preparing a formyl nano microsphere lactic streptococci conjugate, dissolving the formyl nano microsphere lactic streptococci conjugate in deionized water, and carrying out oscillation dispersion to obtain a formyl nano microsphere-lactic streptococci conjugate dispersion solution; and (c) dropwisely adding the formyl nano microsphere-lactic streptococci conjugate dispersion solution prepared in the step (b) into the polyvinyl alcohol film solution prepared in the step (a), stirring, carrying out degassing, flow casting and drying treatment, and carrying out normal-temperature cooling and film peeling to obtain the antimicrobial packaging film with intelligent controlled-release performance, namely the lactic streptococci-polyvinyl alcohol nano antimicrobial film. The antimicrobial packaging film can reduce the food interior deterioration, and is beneficial to food preservation.

Description

technical field [0001] The invention belongs to the technical field of packaging films, and in particular relates to an antibacterial packaging film with intelligent controlled release performance, a preparation method and application thereof. Background technique [0002] At present, most of the packaging films used in the food industry are traditional inert packaging films. Because these traditional inert packaging films must be protected by direct spraying or dipping of antibacterial agents, they often lead to problems such as excessive addition and decline in antiseptic effectiveness. The quality is reduced, and more seriously, the food safety problem is prominent, which has been increasingly criticized by consumers. [0003] Antibacterial packaging film is a functional film that has the ability to inhibit or kill surface bacteria after adding antibacterial agents. According to the different antibacterial agents added, antibacterial packaging films can be divided into t...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L25/08C08F212/08C08F212/14C08F220/40C08F212/36C08F2/30C08J5/18A23L3/3571
CPCA23L3/3571C08F212/08C08J5/18C08J2329/04C08J2425/08C08L25/08C08L29/04C08L2203/16C08F212/14C08F220/40C08F212/36C08F2/30
Inventor 肖乃玉李晨蔡浩涛涂保龙翟万京钟乐王琴余倩柳建良
Owner ZHONGKAI UNIV OF AGRI & ENG
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