Polylactic Acid-Based Film Modified with Nano-Ag-Graphene-TiO2: New Film versus Recycled Film

IF 2 4区工程技术 Q3 ENGINEERING, CHEMICAL

Advances in Polymer Technology Pub Date : 2023-11-25 DOI:10.1155/2023/9937270

Anca Peter, Camelia Nicula, Anca Mihaly Cozmuta, Goran Drazic, Antonio Peñas, Stefania Silvi, Leonard Mihaly Cozmuta

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Abstract

The increase in the polymer-based materials needs has induced along the waste accumulation, thus argued higher interest in recycling. The study aims to assess the structural, morphological, mechanical resistance, physical–chemical and biochemical characteristics, as well as the preservative role during the curd cheese storage of a recycled polylactic acid (PLA)-based film modified with Ag-graphene-TiO₂ nanostructured composite, obtained by recovering the composite from the used film, followed by its incorporation in new PLA. The breaking load of the recycled film was 24% lower than that of the new film and 10% higher than of the neat PLA. Differential scanning calorimetry (DSC) showed changes of the recycled PLA’s surface tension and crystallization degree in a greater extent than in the newly prepared film, revealing better incorporation of the recovered composite into the PLA matrix. Fourier transformed infrared spectroscopy showed the formation of C–O–Ti bridges between composite and PLA both in new and recycled film. Oxygen transmission rate (OTR) of the new and recycled film decreased by 33% and 45%, respectively, in comparison with reference PLA. The curd cheese was successfully stored in the recycled packaging; the organoleptic characteristics of cheese wrapped in recycled film were superior in comparison with the new film. The variation of fat and protein contents and mass loss was the lowest when the recycled film was used as packaging material. The study successfully showed the possibility to recover and recycle the used PLA-based films modified with inorganic nanocomposites.

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纳米ag -石墨烯- tio2改性聚乳酸基薄膜:新膜与再生膜

聚合物基材料需求的增加引起了废物的积累，从而引起了人们对回收利用的更高兴趣。该研究旨在评估用ag -石墨烯- tio2纳米复合材料改性的聚乳酸(PLA)基薄膜的结构、形态、机械阻力、物理化学和生化特性，以及在凝乳奶酪储存过程中的防腐作用。该复合材料是通过从废旧薄膜中回收该复合材料，然后将其掺入新的PLA中。再生膜的断裂载荷比新膜低24%，比纯PLA高10%。差示扫描量热法(DSC)显示，与新制备的薄膜相比，回收PLA的表面张力和结晶程度发生了更大的变化，表明回收的复合材料更好地融入PLA基体。傅里叶变换红外光谱显示，在新膜和回收膜中，复合材料与PLA之间都形成了C-O-Ti桥。与参考聚乳酸相比，新膜和再生膜的透氧率分别降低33%和45%。凝乳奶酪被成功地储存在回收的包装中;与新膜相比，用再生膜包装的奶酪的感官特性更优越。以再生膜为包装材料时，脂肪、蛋白质含量变化最小，质量损失最小。该研究成功地展示了用无机纳米复合材料修饰的废旧pla基薄膜的回收和循环利用的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Advances in Polymer Technology 工程技术-高分子科学

CiteScore

5.50

自引率

0.00%

发文量

审稿时长

9 months

期刊介绍： Advances in Polymer Technology publishes articles reporting important developments in polymeric materials, their manufacture and processing, and polymer product design, as well as those considering the economic and environmental impacts of polymer technology. The journal primarily caters to researchers, technologists, engineers, consultants, and production personnel.