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Efficient separation of polyester/cotton blends using a deep eutectic solvent–NaOH hybrid system for textile recycling
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DOI：10.1039/D5GC04525H.png)
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Abstract
En 中文
To overcome the key challenges in polyester (PET)/cotton blend separation—such as difficulty in separation; high energy use; and performance degradation—a green; innovative and efficient choline chloride/ethylene glycol deep eutectic solvent–sodium hydroxide (DES–NaOH) hybrid system was developed. Benefiting from the selective structural loosening of PET fibers by DES; confirmed by Raman imaging technology; which significantly accelerates degradation under alkaline conditions; this work achieves complete degradation and recycling of PET fibers under mild reaction conditions (dissolution temperature of 98 °C; duration time of 60 min; NaOH dosage of 5% w/v; and liquor ratio of 1 : 30). Importantly; high-purity terephthalic acid was recovered through acidification; precipitation; and filtration; while cotton fibers maintained structural integrity and properties with minimal mass loss (<3%); confirming the valuable; effective and selective separation process. This work offers an innovative; environmentally friendly; and cost-effective solution to the challenge of PET/cotton blend waste recycling.
Journal
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9.2
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1.3W
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7.6W