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説明:

Polyamides (nylons) are a ubiquitous class of engineering plastics featuring good heat resistance and mechanical properties and are used in various industries ranging from automotive parts to textiles to packaging. They are resistant to many common solvents such as alcohols and hydrocarbons yet are susceptible to hydrolysis in acidic or alkaline solutions, making them difficult to recycle under mild conditions. In the present study, a mixed solvent composed of formic acid and chlorinated alkanes is found to rapidly dissolve a wide range of aliphatic and semi-aromatic nylons, in particular bio-based PA11, which was difficult to dissolve in the past due to its long alkyl segment. The regenerated polymers show no change in their chemical structures or properties. Furthermore, this facile dissolution-based recycling strategy is also ideal for recovering fillers, as demonstrated with short- and long-fiber composites, mica nanocomposites, and nylon/polypropylene layered films, achieving over 98% recovery of both polymer and fillers along with complete circulation of all solvents. This process has the potential to change the thermoplastic recycling landscape by making even conventional nylon composites more sustainable, and closing the loop for bio-based “renewable” nylons.

権利情報:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

キーワード: Recycle, Polyamide, Cosolvent, Room temperature, formic acid, chlorinated alkanes

刊行年月日: 2025-07-28

出版者: Wiley

掲載誌:

• ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (ISSN: 00448249) vol. 64 issue. 31

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/anie.202502474

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更新時刻: 2025-08-20 14:42:10 +0900

MDRでの公開時刻: 2025-08-20 16:18:31 +0900