CN-121975191-A - Co-MOF@CEO intelligent active packaging film and preparation method and application thereof

CN121975191ACN 121975191 ACN121975191 ACN 121975191ACN-121975191-A

Abstract

The invention belongs to the technical field of food packaging materials, and particularly relates to a Co-MOF@CEO intelligent active packaging film and a preparation method and application thereof. According to the invention, cinnamon essential oil is embedded in a cobalt-based metal organic framework to form composite nano particles with antibacterial and ammonia-sensitive functions, then the composite nano particles are mixed with potato starch, and a solution casting method is used for forming a film, so that an intelligent active packaging film is obtained. The preparation method of the intelligent active packaging film reduces the water solubility of the potato starch packaging film, and the prepared intelligent active packaging film has good antibacterial, antioxidant, mechanical and barrier properties, good sensitivity to ammonia, can monitor the freshness of meat quality in real time only through the color change of the packaging film, can realize the fresh-keeping and freshness visual monitoring of foods such as fish meat, and has good application prospects in the field of intelligent active packaging.

Inventors

ZHANG RONGFEI
Guo Shuaiyu
XU CHENMENG
WANG XIANGYOU
LIU ZHANLI
YANG XINYU

Assignees

山东理工大学

Dates

Publication Date: 20260505
Application Date: 20260320

Claims (10)

1. The Co-MOF@CEO intelligent active packaging film is characterized by comprising a film forming matrix and composite nano particles dispersed in the film forming matrix, wherein the film forming matrix is potato starch, and the composite nano particles are formed by embedding cinnamon essential oil in a cobalt-based metal organic framework.
2. A method for preparing the intelligent active packaging film of Co-mof@ceo according to claim 1, comprising the following steps: placing the cobalt-based metal organic framework and cinnamon essential oil in an organic solvent environment, embedding the cinnamon essential oil in a cobalt-based metal organic framework pore canal, and evaporating the organic solvent to obtain composite nano particles; Dissolving the composite nano particles in water, adding a plasticizer and potato starch, and stirring to obtain starch film-forming liquid; and (3) solidifying and forming the starch film forming liquid to obtain the Co-MOF@CEO intelligent active packaging film.
3. The preparation method of the nano-porous ceramic material according to claim 2, wherein the organic solvent is chloroform or ethanol, the dispersion is ultrasonic dispersion, the dispersion temperature is 20-30 ℃, and the dispersion time is 25-35 min.
4. The preparation method of the cobalt-based metal organic framework is characterized in that the cobalt-based metal organic framework is obtained by reacting metal cobalt salt and trimesic acid through a solvothermal method, and the molar ratio of the metal cobalt salt to the trimesic acid is 14-15:9-10.
5. The preparation method according to claim 4, wherein the solvothermal reaction temperature is 195-205 ℃ and the reaction time is 15-16 h.
6. The preparation method of claim 2, wherein the ratio of the cobalt-based metal organic framework, the cinnamon essential oil and the organic solvent is 0.9 g-1.0 g:3.9 mL-4.0 mL:9 mL-10 mL.
7. The preparation method of the composite nano-particle according to claim 2, wherein the plasticizer is glycerol, sorbitol or propylene glycol, and the mass ratio of the glycerol to the potato starch to the composite nano-particle is 0.8:2:0.025-0.1.
8. The method of claim 2, wherein the curing temperature is 44 ℃ to 45 ℃.
9. Use of the Co-mof@ceo smart active packaging film according to claim 1 for food freshness monitoring, wherein said food is fresh meat, seafood products or processed meat products.
10. The use of the Co-mof@ceo intelligent active packaging film according to claim 1 as a food preservative film, wherein the food preservative film has antibacterial activity or antioxidant activity.

Description

Co-MOF@CEO intelligent active packaging film and preparation method and application thereof Technical Field The invention belongs to the technical field of food packaging materials, and particularly relates to a Co-MOF@CEO intelligent active packaging film and a preparation method and application thereof. Background With the synchronous improvement of economic level and food safety awareness, the quality and safety of aquatic products have become important issues of social concern. The aquatic products are rich in proteins and various bioactive substances, and play an important role in dietary nutrition structures. However, aquatic products are extremely easy to spoil and deteriorate in the process of storage and circulation, wherein fish is taken as a typical high-protein food material, the tissues are rich in endogenous enzymes and microbial flora, the tissues can be continuously propagated and metabolized even under a cold chain, the tissue degradation is accelerated, meanwhile, the temperature fluctuation in the transportation link further aggravates the microbial proliferation risk, the quality is deteriorated, the nutritional value is lost, and major food safety hazards can be possibly caused. Therefore, a rapid and reliable fish freshness assessment system is established, and the method has important practical significance for guaranteeing the health of consumers and maintaining the industrial economic benefit. At present, conventional detection methods of fish freshness mainly comprise sensory evaluation, microbiological detection and chemical index analysis. However, these methods generally have the problems of complicated operation, long period, high dependence on professionals and easy introduction of human errors, and are difficult to meet the urgent demands for real-time and nondestructive detection in modern food supply chains. In recent years, metal organic framework Materials (MOFs) have been widely focused on the fact that the structures and functions of the MOFs are adjustable, wherein cobalt-based metal organic frameworks (Co-MOFs) not only have excellent antibacterial performance, but also have the advantages that Co-O and Co-N groups in the structures can react with volatile ammonia substances, and the MOFs show high sensitivity to ammonia gas, so that the MOFs have application potential in the aspects of intelligent packaging and freshness indication. On the other hand, cinnamon Essential Oil (CEO) is taken as a natural functional extract, has good antibacterial and antioxidant properties, and can effectively improve the biological activity of the packaging material. Although Potato Starch (PS) has good film forming performance, pure starch film has strong hydrophilicity and insufficient barrier performance, and limits the practical application of the pure starch film in food packaging. Although the introduction of active ingredients into starch matrices to improve film performance has been studied, there is still a lack of packaging materials that can simultaneously achieve both fresh keeping and freshness monitoring integration. Disclosure of Invention In order to solve the problems, the invention provides the Co-MOF@CEO intelligent active packaging film, and the preparation method and application thereof, wherein the packaging film has good antibacterial, antioxidant, mechanical and barrier properties, good sensitivity to ammonia, can monitor the freshness of meat quality in real time through color change, realizes the integration of fresh keeping and freshness monitoring of foods such as fish meat and the like, and has good application prospect in the field of intelligent active packaging. In order to achieve the above purpose, the specific technical scheme of the invention is as follows: the invention provides a Co-MOF@CEO intelligent active packaging film which comprises a film forming matrix and composite nano particles dispersed in the film forming matrix, wherein the film forming matrix is potato starch, and the composite nano particles are formed by embedding cinnamon essential oil into a cobalt-based metal organic framework. The second aspect of the invention provides a preparation method of the Co-MOF@CEO intelligent active packaging film, which comprises the following steps: Placing a cobalt-based metal organic framework and cinnamon essential oil in an organic solvent environment, dispersing the cobalt-based metal organic framework in an organic solvent solution for dissolving the cinnamon essential oil, embedding the cinnamon essential oil in a cobalt-based metal organic framework pore canal, and evaporating the organic solvent to obtain composite nano particles; Dissolving the composite nano particles in water, adding a plasticizer and potato starch, and stirring to obtain starch film-forming liquid; and (3) solidifying and forming the starch film forming liquid to obtain the Co-MOF@CEO intelligent active packaging film. The Co-O/Co-N group of the cobalt-based metal org