Development of corn straw lignin-based cling films for enhanced preservation of strawberries

IF 10.6 1区农林科学 Q1 FOOD SCIENCE & TECHNOLOGY

Food Packaging and Shelf Life Pub Date : 2025-05-29 DOI:10.1016/j.fpsl.2025.101529

Tao Yu , Tong Wang , Renguo Zhang, Chenglin Su, Shuang Cao, Yini Zhao, Hejing Wang, Jiaxing Li, Na Niu, Ligang Chen

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引用次数: 0

Abstract

Biodegradable cling film is an environmentally friendly alternative to traditional plastics which still requires the addition of preservatives to improve its ability to retain freshness. Lignin, which is a natural product with both safety and antioxidant effects, has become a potential preservative. In this study, lignin was extracted from pine and corn straw by deep eutectic solvent. The lignin yield was 40.54 % and 60.60 %, respectively. A series of CS/LNPs cling films were prepared by lignin nanoparticles as the main freshness preservation and chitosan (CS) as substrates. The film with 5 % lignin nanoparticles (CS/LNPs-5) demonstrated an 89.10 % DPPH radical scavenging rate, indicating superior antioxidant capacity. Moreover, the CS/LNPs-5 films showed good UV shielding ability, mechanical properties, and hydrophobicity. Remarkably, CS/LNPs-5 was applied to preserve perishable strawberries, which extended their freshness for up to 9 days. In this study, lignin nanoparticles were successfully used to prepare cling film with high antioxidant properties, which provides a new approach for lignin in food packaging.

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玉米秸秆木质素基草莓保鲜膜的研制

可生物降解的保鲜膜是传统塑料的环保替代品，传统塑料仍然需要添加防腐剂来提高其保持新鲜度的能力。木质素作为一种既安全又具有抗氧化作用的天然产物，已成为一种潜在的防腐剂。以松木和玉米秸秆为原料，采用深度共晶溶剂提取木质素。木质素得率分别为40.54 %和60.60 %。以木质素纳米颗粒为主要保鲜剂，壳聚糖（CS）为底物，制备了一系列CS/LNPs保鲜膜。含有5 %木质素纳米颗粒（CS/LNPs-5）的膜具有89.10 %的DPPH自由基清除率，显示出优异的抗氧化能力。此外，CS/LNPs-5薄膜具有良好的紫外线屏蔽能力、力学性能和疏水性。值得注意的是，CS/LNPs-5被用于保存易腐草莓，延长了草莓的新鲜度，最长可达9天。本研究成功地利用木质素纳米颗粒制备了具有高抗氧化性能的保鲜膜，为木质素在食品包装中的应用提供了新的途径。

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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.