Recycling of polymer laminated aluminum packaging (PLAP) materials into carbonaceous metallic microparticles

JOURNAL OF CLEANER PRODUCTION

卷:269

Article

Al Mahmood, Abdullah¹  Hossain, Rumana¹  Bhattacharyya, Saroj²  Sahajwalla, Veena¹ 

[1] UNSW Sydney, Sch Mat Sci & Engn, SMaRT UNSW, Ctr Sustainable Mat Res & Technol, Sydney, NSW, Australia

[2] UNSW, Mark Wainwright Analyt Ctr, Sydney, NSW 2052, Australia

关键词: Aluminum recycling;    Packaging waste;    Polymer degradation;    Cryo-milling;    Aluminum microparticles;   

DOI  :  10.1016/j.jclepro.2020.122157

来源: Elsevier

【 摘 要 】

This research describes the recycling of laminated metal packaging into multiple products by utilizing three different techniques. PLAP materials have been thermally disengaged at 550 degrees C for 20 min in an argon gas created inert atmosphere to recycle into solid Al and graphitic carbon. In a different route, in the presence of gaseous N-2 at 600 degrees C for 1h, the PLAP materials are degraded into bio-oil. A new technique to produce powdered materials from the ductile metal (Al) has been introduced in this study. In this technique, recycled Al and C from the first route at 550 degrees C, undergoes mechanical milling at cryogenic temperature (-196 degrees C) created by liquid N-2. The translatory high energy ball milling process varied for 2, 4, 6, and 8 cycles (time: 17, 29, 41, and 53 min respectively). As the milling process is extensively high impact loaded at a very low temperature, the foil-like Al recycled from the packaging waste transforms into smaller particles within a very short time (20 min). Upon further milling (41 min), the microparticles (particle size below 100 mu m) of Al can be observed. The microparticles received from the cryo-mill are characterized to investigate the particle size, morphology, crystallographic structure, thermal behavior, chemical state, and dispersibility in different liquid media. Flake shaped, and microsized carbonaceous Al microparticles are contamination-free and thermally stable and can be useful in the fields of additive manufacturing. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

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