pH-responsive polyphenol–polyester composite films for active food packaging

IF 10.8 1区农林科学 Q1 FOOD SCIENCE & TECHNOLOGY

Food Packaging and Shelf Life Pub Date : 2026-03-01 Epub Date: 2026-03-06 DOI:10.1016/j.fpsl.2026.101727

Xin Hu , Zhen Zhang , Chen geng , Peijie Hou , Jun Wang , Yang Li , Lifang Zhang

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引用次数: 0

Abstract

Food spoilage driven by oxidative stress and microbial contamination remains a major challenge in minimally processed fruits, while the development of flexible biodegradable packaging systems with regulated and responsive bioactivity remains limited. In this study, a flexible bio-based active film was fabricated by incorporating gallic acid (GA) into a biodegradable poly(L-lactide)-b-poly(trimethylene carbonate) (PLLA-b-PTMC, PLT) matrix. Intermolecular hydrogen bonding between GA and PLT induced microstructural reorganization and altered chain mobility, enabling biphasic, diffusion-controlled GA release with pH-dependent behavior. The composite films exhibited reactive oxygen species scavenging activity, dose-dependent antibacterial performance against Escherichia coli and Staphylococcus aureus, and maintained cytocompatibility at effective GA loadings. Application in a fresh-fruit preservation model demonstrated delayed browning and moderated quality deterioration during storage. These findings indicate that regulating polymer–polyphenol interactions can align release behavior with storage-induced environmental changes, contributing to oxidative and microbial spoilage control in minimally processed fruits.

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活性食品包装用ph响应型多酚-聚酯复合薄膜

氧化应激和微生物污染导致的食品腐败仍然是最低限度加工水果的主要挑战，而具有调节和响应生物活性的柔性可生物降解包装系统的开发仍然有限。在本研究中，将没食子酸（GA）掺入可生物降解的聚（l -丙交酯）-b-聚（三亚甲基碳酸酯）（pla -b- ptmc， PLT）基质中制备了一种柔性生物基活性膜。GA和PLT之间的分子间氢键诱导了微观结构重组和链迁移率的改变，实现了具有ph依赖行为的双相扩散控制GA释放。复合膜具有活性氧清除活性，对大肠杆菌和金黄色葡萄球菌具有剂量依赖性的抗菌性能，并在有效GA负载下保持细胞相容性。在新鲜水果保存模型中的应用表明，在储存过程中延迟褐变和减缓质量恶化。这些发现表明，调节聚合物-多酚相互作用可以使释放行为与储存引起的环境变化相一致，有助于控制低加工水果的氧化和微生物腐败。

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来源期刊

Food Packaging and Shelf Life Agricultural and Biological Sciences-Food Science

CiteScore

14.00

自引率

8.80%

发文量

214

审稿时长

70 days

期刊介绍： Food packaging is crucial for preserving food integrity throughout the distribution chain. It safeguards against contamination by physical, chemical, and biological agents, ensuring the safety and quality of processed foods. The evolution of novel food packaging, including modified atmosphere and active packaging, has extended shelf life, enhancing convenience for consumers. Shelf life, the duration a perishable item remains suitable for sale, use, or consumption, is intricately linked with food packaging, emphasizing its role in maintaining product quality and safety.

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1260 Infinity II LC System