通过加强对消费后包装废弃物的机械处理，提高pp回收质量

IF 10.9 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-07-12 DOI:10.1016/j.resconrec.2025.108494

Nikolai Kuhn , Moritz Mager , Jörg Fischer , Gerald Koinig , Alexia Tischberger-Aldrian

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引用次数: 0

摘要

要达到更高的回收目标，就需要回收者的品质始终如一。然而，不同包装类型（如瓶盖和瓶子）的混合回收降低了回收质量，限制了原始材料的可替代性。在这项研究中，我们提出了一个工业上可扩展和随时可部署的聚丙烯（PP）包装废物的过程，包括分类，粉碎，洗涤和挤压。我们证明了基于传感器的根据不透明度（白色pp）和透明度（透明pp）对物品和鳞片级别进行分类会改变pp回收物的机械性能和可加工性。White-PP再生材料的熔体流动速率（17比9 g/10 min）和刚度（杨氏模量1424 MPa比1154 MPa）比clear-PP再生材料高近两倍。这些差异可归因于白色pp与透明pp结晶度的差异。我们的研究结果强调了先进的分类方法的经济和环境效益，以提高PP回收质量，使PP回收物的高价值应用成为可能，并支持向循环塑料经济的过渡。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Increasing the PP-recyclate quality by enhanced mechanical processing of post-consumer packaging waste

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Increasing the PP-recyclate quality by enhanced mechanical processing of post-consumer packaging waste

Achieving higher recycling targets requires recyclates with consistent qualities. However, mixed recycling of different packaging types (e.g., caps and bottles) reduces recyclate quality, limiting substitutability for virgin materials. In this study, we present an industrially scalable and ready-to-deploy process for polypropylene (PP) packaging waste, which includes sorting, shredding, washing, and extrusion. We demonstrate that sensor-based sorting on article and flake level according to opacity (white-PP) and translucency (clear-PP) alters the mechanical properties and processability of PP-recyclates. White-PP recyclate exhibited a nearly twofold higher melt flow rate (17 vs. 9 g/10 min) and greater stiffness (Young's modulus 1424 MPa vs. 1154 MPa) than that of clear-PP recyclate. These differences can be attributed to variations in crystallinity of white-PP compared to clear-PP. Our results highlight the economic and environmental benefits of advanced sorting method to increase PP-recyclate quality – enabling higher-value applications for PP recyclates and supporting the transition towards a circular plastics economy.

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.