Use of Deep Eutectic Solvents for Plastic Waste Management : Towards a Green Solution for Recycling

Abstract

The management of plastic waste poses a significant environmental challenge, with large amounts of plastic ending up in landfills and oceans every year. Traditional recycling methods often fail, especially for complex plastics like multi-layer films and composites. Deep eutectic solvents (DES), a class of non-toxic and biodegradable solvents, offer a promising solution for plastic recycling. DES can dissolve and degrade a wide range of plastics, such as polystyrene (PS), polyethylene (PE), and polyethylene terephthalate (PET), by breaking polymer chains and transforming plastics into reusable products or valuable monomers. Compared to conventional recycling methods, DES offer several advantages, including selective dissolution of specific plastics, low environmental impact, and the potential for recycling at ambient temperatures, which reduces energy consumption. However, challenges remain, including high viscosity, selective solubility, and the need for solvent regeneration. The future of DES in plastic recycling lies in the development of improved solvent systems, their integration into industrial processes, and their use in green chemistry. Ultimately, DES offer a sustainable solution for enhancing plastic waste management and contributing to a circular economy.