Polyvinyl alcohol-based composite film, method for preparing the same, and use thereof

CN122188317BActive Publication Date: 2026-08-28JIMEI UNIV
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Patent Information

Application Number
CN202610668009.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-05-15
Publication Date
2026-08-28
Estimated Expiration
2046-05-15

AI Technical Summary

Technical Problem

但传统的PVA薄膜仍存在明显性能缺陷：一方面，其分子链富含大量羟基，亲水性过强，导致水蒸气阻隔性能不足，难以有效阻隔生鲜食品中的水分迁移；另一方面，PVA薄膜自身不具备抗氧化、抗菌、紫外屏蔽等活性功能，无法满足高附加值食品，尤其是高水分、高蛋白易腐水产品的长效保鲜需求，限制了其在活性包装领域的应用

Benefits of technology

本发明成功将天然蜂胶提取物引入聚乙烯醇基体中，所制备的复合薄膜兼具高透明度、良好可加工性、优异的抗菌性与抗氧化性能，同时具有安全性，可用于食品保鲜。

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Abstract

The application belongs to the field of film materials for food, and provides a polyvinyl alcohol-based composite film and a preparation method and application thereof.The preparation method of the polyvinyl alcohol-based composite film comprises the following steps: (1) providing an extractant, wherein the extractant comprises a eutectic solvent and water, and the eutectic solvent is formed by beta-cyclodextrin and glycolic acid in a molar ratio of 1:(45-55); (2) extracting propolis powder by using the extractant to obtain a propolis extract; (3) uniformly mixing a polyvinyl alcohol aqueous solution, the propolis extract and an optional zeolitic imidazolate framework material to obtain a film-forming solution; and (4) preparing a film from the film-forming solution to obtain the polyvinyl alcohol-based composite film.The polyvinyl alcohol-based composite film not only has high transparency and good processability, but also has excellent barrier properties, antioxidant properties and antibacterial activity.
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Citation Information

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