Asymmetric Janus composite films with superior humidity regulation capabilities for the efficient preservation of strawberry fruit

IF 8.5 1区农林科学 Q1 CHEMISTRY, APPLIED Food Chemistry Pub Date : 2025-03-01 DOI:10.1016/j.foodchem.2025.143646

Hao Dong , Shuang Han , Keqin Mi , Yahui Hao , Geoffrey I.N. Waterhouse , Liping Tong , Shifeng Hou

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Abstract

This study aims to report the limitations of single-layer film packaging to control relative humidity and preventing water vapor condensation within packaging systems. It introduces the development of an asymmetrically structured Janus humidity-regulated composite film. The composite film consists of an inner active layer made of polyvinyl alcohol/chitosan (PVA/CS) with a fibrous structure, and an outer barrier layer composed of PVA_{x% humic acid (HA)} with a dense configuration. The PVA/CS inner active layer exhibits excellent water uptake properties (0.36 g/g) and rapid adsorption-desorption kinetics, reaching equilibrium in 17 min. The PVA_x%HA outer barrier exhibits favorable water vapor barrier characteristics, with a water vapor permeability of (0.64 ± 0.01) × 10⁻¹¹ g·m/(m²·s·Pa). In strawberry preservation, the PVA/CS-PVA_1._5%_HA composite film boosted storage relative humidity by 135.24 % and kept strawberries fresh for 7 days. This humidity-regulating film packaging offers a promising approach to extending the shelf life of fruits with high moisture content.

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具有卓越湿度调节能力的非对称 Janus 复合薄膜，用于高效保存草莓果实

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来源期刊

Food Chemistry 工程技术-食品科技

CiteScore

16.30

自引率

10.20%

发文量

3130

审稿时长

122 days

期刊介绍： Food Chemistry publishes original research papers dealing with the advancement of the chemistry and biochemistry of foods or the analytical methods/ approach used. All papers should focus on the novelty of the research carried out.