Smart active composite film with fresh-keeping and monitoring functions and preparation method and application thereof

By using a smart fragrance microreactor that encapsulates thymol with spirulina and chitosan to form a film with konjac glucomannan and blueberry anthocyanins, the problem of fruit and vegetable spoilage during storage is solved, enabling long-term sustained release of thymol and monitoring of fruit and vegetable freshness, thus improving preservation effect and antibacterial ability.

CN122188202APending Publication Date: 2026-06-12HEFEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Filing Date
2026-05-15
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Traditional fruit and vegetable preservation technologies are insufficient to effectively address the problem of spoilage and deterioration of fresh fruits and vegetables such as strawberries during post-harvest storage due to mechanical damage and pathogenic bacterial infection. Furthermore, the volatility and pungent odor of thymol make it difficult to achieve long-term preservation and precise control in active packaging.

Method used

A smart fragrance microreactor with pH/humidity dual response was constructed by using spirulina to confine and retain thymol and then coating it with carboxymethyl chitosan. This microreactor was then used to form a film with konjac glucomannan and blueberry anthocyanins, thus preparing a smart active composite film with preservation and monitoring functions.

Benefits of technology

It achieves intelligent slow release of thymol, enhances the antibacterial and antioxidant capabilities of the film, provides long-lasting freshness preservation, and enables non-destructive freshness monitoring through anthocyanin color change, significantly extending the shelf life of fruits and vegetables.

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Abstract

The application discloses an intelligent active composite film with fresh-keeping and monitoring functions and a preparation method and application thereof. The preparation method comprises the following steps: limiting and intercepting thymol by spirulina to obtain spirulina loaded with thymol; coating the spirulina loaded with thymol by carboxymethyl chitosan to prepare an intelligent fragrance micro-reactor with pH / humidity dual response characteristics; and performing film forming treatment on a film forming liquid containing konjac glucomannan, blueberry anthocyanin, the intelligent fragrance micro-reactor and water to prepare the intelligent active composite film with the fresh-keeping and monitoring functions. The intelligent active composite film can realize fresh-keeping through active anti-corrosion intervention, has the in-situ freshness real-time diagnosis function and has a good application prospect in novel green food packaging materials.
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