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PH responsive intelligent controlled-release antibacterial degradable packaging film and preparation method and application thereof

An intelligent controlled-release, packaging film technology, applied in the sustainable packaging industry, packaging, application and other directions, can solve the problems of poor compatibility and uneven dispersion of antibacterial agents and packaging base films, avoid white pollution pressure, maintain Product quality and the effect of improving the loading rate

Active Publication Date: 2021-11-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem to be solved: This application mainly proposes a pH-responsive intelligent controlled-release antibacterial degradable packaging film and its preparation method and application, which solves the problem of poor compatibility between antibacterial agents and packaging base films in the prior art. In order to solve technical problems such as violent release and non-release caused by unevenness, the present invention forms an active antibacterial compound by carrying the antibacterial agent on the mesoporous nanometer metal oxide carrier through the principle of chelation and electrostatic adsorption. The body is introduced into the degradable base film and compounded with the barrier layer. The method not only endows the packaging film with the ability to sense and respond to the pH change of food grafting to release antimicrobial agents

Method used

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  • PH responsive intelligent controlled-release antibacterial degradable packaging film and preparation method and application thereof
  • PH responsive intelligent controlled-release antibacterial degradable packaging film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A pH-responsive intelligent controlled-release antibacterial degradable packaging film, the specific steps of its preparation are as follows:

[0045] The first step: take by weighing 3.30g zinc acetate dihydrate Zn(CH 3 COO) 2 2H 2 O and 18.03g urea CO(NH 2 ) 2 Dissolve in 50ml distilled water to prepare zinc source solution;

[0046] Step 2: Weigh 0.36g of poloxamer 188 (F68) and dissolve 0.36g of sucrose in 50ml of distilled water to prepare a composite template solution;

[0047] The third step is to introduce the zinc source solution into the three-necked flask, add the composite template solution under stirring, and after stirring continuously for 5 minutes, add acetic acid CH 3 COOH was used to adjust the pH of the solution to 4-5, and after continuing to stir for 2 hours, the mixed solution was transferred to a hydrothermal reaction kettle for sealing, and the crystallization reaction was carried out at a constant temperature of 100° C. for 24 hours. ;

...

Embodiment 2

[0059] A pH-responsive intelligent controlled-release antibacterial degradable packaging film, the specific steps of its preparation are as follows:

[0060] The first step: take by weighing 3.30g zinc acetate dihydrate Zn(CH 3 COO) 2 2H 2 O and 24.04g urea CO(NH 2 ) 2 Dissolve in 50ml distilled water to prepare zinc source solution;

[0061] Step 2: Weigh 0.36g of poloxamer 188 (F68) and dissolve 0.72g of sucrose in 50ml of distilled water to prepare a composite template solution;

[0062] The third step is to introduce the zinc source solution into the three-necked flask, add the composite template solution under stirring, and after stirring continuously for 10 minutes, add acetic acid CH 3 Adjust the pH of the solution to 4 to 5 with COOH, continue to stir for 2 hours, then transfer the mixed solution to a hydrothermal reaction kettle for sealing, and conduct a crystallization reaction at a constant temperature of 90°C for 24 hours;

[0063] The fourth step: After the...

Embodiment 3

[0074] A pH-responsive intelligent controlled-release antibacterial degradable packaging film, the specific steps of its preparation are as follows:

[0075] The first step: take by weighing 2.20g zinc acetate dihydrate Zn (CH 3 COO) 2 2H 2 O and 18.03g urea CO(NH 2 ) 2 Dissolve in 50ml distilled water to prepare zinc source solution;

[0076] Step 2: Weigh 0.24g of poloxamer 188 (F68) and dissolve 0.48g of sucrose in 50ml of distilled water to prepare a composite template solution;

[0077] The third step is to introduce the zinc source solution into the three-necked flask, add the composite template solution under stirring, and after stirring continuously for 10 minutes, add acetic acid CH 3 COOH was used to adjust the pH of the solution to 4-5, and after continuing to stir for 2 hours, the mixed solution was transferred to a hydrothermal reaction kettle for sealing, and crystallized at a constant temperature of 80° C. for 24 hours. ;

[0078] Step 4: After the reacti...

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Abstract

The invention discloses a pH responsive intelligent controlled-release antibacterial degradable packaging film and a preparation method and application thereof. The pH responsive intelligent controlled-release antibacterial degradable packaging film is composed of an active antibacterial layer prepared from a biodegradable base material and a blocking layer, and the active antibacterial layer contains an intelligent antibacterial compound prepared from a pH response controlled-release type mesoporous nano-zinc oxide carrying antibacterial agent; a modified and dispersed graphene oxide nanosheet layer material is contained in the blocking layer, and the biodegradable base material raw material contains PBAT raw material particles, PLA raw material particles, acetyl tributyl citrate ATBC and a chain extender ADR-4368. The pH responsive high specific surface area carrier is used for carrying the antibacterial agent, and the antibacterial agent is responsively released by sensing an internal dynamic acid environment generated by wrapped fresh food or microbial metabolism, so that the release amount of the antibacterial agent is consistent with the food fresh-keeping requirement. The packaging film can be used for preserving perishable and fresh food. The raw materials are biodegradable high polymer materials and low-molecular additives harmless to the environment, and are environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of food active packaging materials, in particular to a pH-responsive intelligent controlled-release antibacterial degradable packaging film and its preparation method and application. Background technique [0002] As a special kind of packaged goods, food is highly susceptible to deterioration and spoilage due to the influence of microorganisms in the process of production, storage and transportation because of its rich nutritional content. The production and packaging process of food cannot be completely sterile, which will inevitably affect the shelf life of food. Therefore, it is very important to control the microorganisms in the packaging environment in the subsequent stages of packaging. [0003] Subsequently, people developed a series of antibacterial packaging. The most widely used type of antibacterial packaging is to directly add antibacterial agents to polymer materials. However, this method canno...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/18B32B27/06C08L67/04C08L67/02C08K9/06C08K3/04B65D81/28B65D65/46
CPCC08L67/04C08L67/02B32B27/36B32B27/18B32B27/08B65D81/28B65D65/466C08L2201/06B32B2307/7145B32B2307/7163B32B2553/00C08K9/06C08K3/042Y02W90/10
Inventor 丘晓琳弓雪峰高书俊文王珂涵周熙春李鑫衡汪洋
Owner JIANGNAN UNIV