Lignocellulosic nanofibers composite films reinforced with green-synthesized copper oxide nanoparticles for active packaging

IF 6.3 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-04-26 DOI:10.1016/j.polymdegradstab.2025.111400

Yihan Gao, Yu-I Hsu, Hiroshi Uyama

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引用次数: 0

Abstract

The search for alternatives to traditional petroleum-based packaging materials has increasingly focused on high-value utilization of agricultural waste. This study aims to maximize the use of tea waste components as raw materials or green reagents for the preparation of sustainable active packaging materials. Copper oxide nanoparticles were synthesized via a green route using tea waste extract, while tea waste-derived nanofibers were prepared through a simple and environmentally friendly one-step H₂O₂ alkaline treatment and homogenization. These two components were added to polyvinyl alcohol (PVA) to prepare composite films. The results showed that the hydrogen bonding interactions between the components significantly enhanced the physical properties of the composite films. The maximum tensile strength and Young’s modulus reached 43.5 MPa and 311.5 MPa, representing increases of 77.6 % and 223.8 %, respectively, compared to pure PVA films. Furthermore, the composite films exhibited excellent thermal stability and water resistance, with the main degradation peak increasing by 55.3 °C, swelling ratio decreasing by 60.8 %, and the time to reach maximum swelling increased by 21 min. The water contact angle of the composite film reached 93° Additionally, antibacterial tests using the colony counting method and practical packaging tests on fresh chicken meat demonstrated the potential application of the composite film in active packaging, providing a more environmentally friendly alternative to traditional petroleum-based plastic packaging.

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活性包装用绿色合成氧化铜纳米颗粒增强木质纤维素纳米纤维复合膜

寻找传统石油基包装材料替代品的工作日益侧重于农业废物的高价值利用。本研究旨在最大限度地利用茶叶废弃物成分作为原料或绿色试剂制备可持续活性包装材料。以茶渣提取物为原料，采用绿色路线合成了氧化铜纳米颗粒，通过简单环保的一步H2O2碱性处理和均质法制备了茶渣纳米纤维。将这两种组分加入聚乙烯醇（PVA）中制备复合膜。结果表明，组分之间的氢键相互作用显著提高了复合膜的物理性能。最大拉伸强度和杨氏模量分别达到43.5 MPa和311.5 MPa，比纯PVA膜分别提高77.6%和223.8%。复合膜表现出优异的热稳定性和耐水性，主要降解峰增加了55.3℃，溶胀率降低了60.8%，达到最大溶胀时间增加了21 min，膜的水接触角达到93°。利用菌落计数法进行的抗菌试验和对新鲜鸡肉进行的实际包装试验表明，复合薄膜在活性包装中的潜在应用，为传统的石油基塑料包装提供了一种更环保的替代品。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.