Development of folic acid and silver nanoparticle modified Cu-based metal–organic framework with enhanced ethylene adsorption and moisture resistance for active fruit packaging

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

Food Packaging and Shelf Life Pub Date : 2026-03-01 Epub Date: 2026-02-24 DOI:10.1016/j.fpsl.2025.101695

Huan Zhang , Haozhe Kong , Farhana R. Pinu , Jinquan Feng , Penghui Zhu , Yunfei Xie , Zhilong Yu

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引用次数: 0

Abstract

A Cu-based metal–organic framework called HKUST-1 holds critical potential for minimizing postharvest fruit waste by regulating C₂H₄ concentration. However, their practical application in food packaging remains constrained by structural instability and diminished C₂H₄ adsorption under high humidity. Here, we improved the hydrophobicity and gas adsorption performance of HKUST-1 with folic acid and silver nanoparticles (AgNPs) using a simple post-synthetic modification strategy. The moisture resistance was significantly enhanced with water contact angle increasing from 55.03° to 103.70°. For HKUAg-1, the C₂H₄ adsorption capacity increased up to 126.66 cm³/g STP, showing a 10 % increase compared with HKUST-1. For the modified material, Cu²⁺ and AgNPs serve as the primary adsorption sites, while folic acid functions as a secondary site that further enhances C₂H₄ adsorption. Finally, HKUAg-1 was applied to bananas, and the results showed that under 90 % relative humidity, the fruits retained a yellow-green appearance up to day 7. Starting from day 3, HKUAg-1 significantly reduced weight loss, C₂H₄ production, respiration rate, and downregulated pectin esterase and pyruvate kinase activities. The results suggest that HKUAg-1 has great potential for use in active packaging to delay ripening and extend the shelf life of bananas even under high-humidity conditions.

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叶酸和银纳米粒子改性铜基金属有机骨架的研制及其对乙烯的吸附和防潮性能的增强

一种名为HKUST-1的铜基金属有机框架具有通过调节C2H4浓度来减少采后水果浪费的关键潜力。然而，它们在食品包装中的实际应用仍然受到结构不稳定和高湿条件下C2H4吸附减少的限制。在这里，我们采用简单的合成后修饰策略改善了HKUST-1与叶酸和银纳米粒子（AgNPs）的疏水性和气体吸附性能。当水接触角从55.03°增加到103.70°时，材料的抗湿性显著增强。对于HKUAg-1， C2H4的吸附量增加到126.66 cm3/g STP，比HKUST-1增加了10 %。对于改性材料，Cu2 +和AgNPs作为一级吸附位点，而叶酸作为二级吸附位点，进一步增强了C2H4的吸附。最后，将HKUAg-1施用于香蕉，结果表明，在相对湿度为90% %的条件下，香蕉的外观一直保持到第7天的黄绿色。从第3天开始，HKUAg-1显著降低体重减轻、C2H4生成、呼吸速率，并下调果胶酯酶和丙酮酸激酶活性。结果表明，HKUAg-1在活性包装中具有很大的应用潜力，即使在高湿条件下也可以延迟香蕉的成熟和延长香蕉的保质期。

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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.