Enabling the Polymer Circular Economy: Innovations in Photoluminescent Labeling of Plastic Waste for Enhanced Sorting.
| Autor: | Larder RR; Department of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom., Hatton FL; Department of Materials, Loughborough University, Loughborough LE11 3TU, United Kingdom. |
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| Jazyk: | angličtina |
| Zdroj: | ACS polymers Au [ACS Polym Au] 2022 Dec 12; Vol. 3 (2), pp. 182-201. Date of Electronic Publication: 2022 Dec 12 (Print Publication: 2023). |
| DOI: | 10.1021/acspolymersau.2c00040 |
| Abstrakt: | It is widely accepted that moving from a linear to circular economy for plastics will be beneficial to reduce plastic pollution in our environment and to prevent loss of material value. However, challenges within the sorting of plastic waste often lead to contaminated waste streams that can devalue recyclates and hinder reprocessing. Therefore, the improvement of the sorting of plastic waste can lead to dramatic improvements in recyclate quality and enable circularity for plastics. Here, we discuss current sorting methods for plastic waste and review labeling techniques to enable enhanced sorting of plastic recyclates. Photoluminescent-based labeling is discussed in detail, including UV-vis organic and inorganic photoluminescent markers, infrared up-conversion, and X-ray fluorescent markers. Methods of incorporating labels within packaging, such as extrusion, surface coatings, and incorporation within external labels are also discussed. Additionally, we highlight some practical models for implementing some of the sorting techniques and provide an outlook for this growing field of research. Competing Interests: The authors declare no competing financial interest. (© 2022 The Authors. Published by American Chemical Society.) |
| Databáze: | MEDLINE |
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