A state-of-the-art review of multilayer packaging recycling: Challenges, alternatives, and outlook

Tamizhdurai, P.; Mangesh, V.L.; Santhosh, S.; Vedavalli, R.; Kavitha, C.; Bhutto, Javed Khan; Alreshidi, Maha Awjan; Yadav, Krishna Kumar; Kumaran, R.

doi:10.1016/j.jclepro.2024.141403

Journal of Cleaner Production

2024

DOI: 10.1016/j.jclepro.2024.141403

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A state-of-the-art review of multilayer packaging recycling: Challenges, alternatives, and outlook

P. Tamizhdurai,

V.L. Mangesh,

S. Santhosh

et al.

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Cited by 17 publications

References 120 publications

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Simultaneous Material and Chemical Recycling of Waste PET/PE Multi‐Layer Films under Hydrothermal Conditions

Zheng,

Suga,

et al. 2024

Angewandte Chemie

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Multi‐layer plastic films are widely used in various fields especially for packaging, but due to complex composition, it is very difficult to recover single‐material polymers or high‐purity monomers from them after usage. In this study, we proposed a hydrothermal process for recycling PET/PE (PET: Polyethylene terephthalate; PE: Polyethylene) films. PET can be hydrolyzed to monomers of terephthalic acid (TPA) and ethylene glycol (EG). Using a hydrothermal system equipped with two filters, PE, TPA, and EG were collected separately, indicating the simultaneous material and chemical recycling of PET/PE films was firstly achieved. At 300 °C and 10 MPa for 60 min, PET conversion reached around 100%, and TPA yield of 83.0% was obtained with a high TPA purity of 96.1%. In addition, the effect of the holding time on PET conversion, TPA yield, EG yield, and TPA purity was studied. This research opened up a new and sustainable pathway to recycle multi‐layer plastic films in both lab and industry.

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Simultaneous Material and Chemical Recycling of Waste PET/PE Multi‐Layer Films under Hydrothermal Conditions

Zheng,

Suga,

et al. 2024

Angewandte Chemie

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Simultaneous Material and Chemical Recycling of Waste PET/PE Multi‐Layer Films under Hydrothermal Conditions

Zheng,

Suga,

et al. 2024

Angew Chem Int Ed

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Enhancing Polypropylene/Polyethylene Blend Performance Through Compatibilization for A Sustainable Future: A Mini Review Focusing on Establishing Bio‐Derived Filler Based Hybrid Compatibilizer System

Zhan,

Elder,

Peng

2024

Macromol. Rapid Commun.

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Polypropylene (PP) and polyethylene (PE) are widely used polymers but significantly contribute to plastic waste. Effective recycling of PP and PE is essential for reducing plastic pollution and enhancing sustainability. Collection of post‐consumer PP and PE wastes forming comingled mixtures is routinely done due to the difficulty of sorting. While polymer blending offers a cost‐effective way to recycle these mixtures, their inherent immiscibility limits the development of high‐performance blends. This review provides an overview of recent advances in compatibilization strategies aimed at enhancing the PP/PE blend performance, with a focus on using bio‐derived fillers as sustainable compatibilizers. Mechanical properties of the PP/PE blends compatibilized by various approaches, including non‐reactive, reactive, and bio‐derived filler compatibilizations are summarized and discussed in terms of their advantages and weaknesses. Simultaneous incorporation of bio‐derived fillers and commercial compatibilizers potentially provides PP/PE blends with more desirable mechanical performance. Furthermore, the review summarizes the rheological and crystallization behaviors of compatibilized blends, emphasizing the significant impact of compatibilization on the processing‐structure‐property relationships within the blends. Current challenges and future directions in using bio‐derived fillers to enhance PP/HDPE compatibilization are discussed. This review provides insight into a sustainable future by endowing plastic waste with desirable properties for broader applications.

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A state-of-the-art review of multilayer packaging recycling: Challenges, alternatives, and outlook

Cited by 17 publications

References 120 publications

Simultaneous Material and Chemical Recycling of Waste PET/PE Multi‐Layer Films under Hydrothermal Conditions

Simultaneous Material and Chemical Recycling of Waste PET/PE Multi‐Layer Films under Hydrothermal Conditions

Simultaneous Material and Chemical Recycling of Waste PET/PE Multi‐Layer Films under Hydrothermal Conditions

Enhancing Polypropylene/Polyethylene Blend Performance Through Compatibilization for A Sustainable Future: A Mini Review Focusing on Establishing Bio‐Derived Filler Based Hybrid Compatibilizer System

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