Separation of Polycotton for Textile Recycling Using the DBU/DMSO/CO2 Switchable Solvent System

IF 7.3 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Sustainable Chemistry & Engineering Pub Date : 2025-03-10 DOI:10.1021/acssuschemeng.4c0763310.1021/acssuschemeng.4c07633

Marcel Jungbluth, and , Sabine Beuermann*,

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引用次数: 0

Abstract

Disposal of textile waste is a growing concern in terms of environmental pollution. Especially, blends of different fibers such as polycotton render recycling of textile wastes difficult, which contributes to low recycling rates in the textile industry. The separation of polycotton into polyester and cotton can enable the recycling of these blended textiles. The selective dissolution of cotton using a switchable solvent system consisting of 1,8–diazabicyclo [5.4.0]undec–7–ene (DBU), dimethyl sulfoxide (DMSO), and carbon dioxide is investigated. After the separation of cellulose from polyester, upon addition of ethanol, cotton precipitates, which allows for facile removal from the solvent system. Extraction at 40 °C and 5 bar CO₂ is feasible for full separation of the constituents of polycotton without degradation of the polyester component, as identified by thermal gravimetric analyses, infrared spectroscopy, size-exclusion chromatography, and scanning electron microscopy of the extracted textiles.

A recycling strategy for the separation of polyester and cellulose from polycotton using a switchable solvent system is described.

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用DBU/DMSO/CO2可切换溶剂系统分离纺织回收用的涤棉

纺织废料的处理在环境污染方面日益受到关注。特别是，不同纤维的混纺，如涤棉，使纺织废料的回收变得困难，这导致了纺织工业的低回收率。将涤棉分离成涤纶和棉，可以使这些混纺纺织品回收利用。研究了由1,8 -重氮杂环[5.4.0]十一- 7 -烯（DBU）、二甲亚砜（DMSO）和二氧化碳组成的可切换溶剂体系对棉花的选择性溶解。纤维素与聚酯分离后，在加入乙醇后，棉花沉淀，这允许容易地从溶剂系统中去除。通过热重分析、红外光谱、尺寸排除层析和扫描电子显微镜对提取的纺织品进行鉴定，在40°C和5bar CO2条件下提取是可行的，可以在不降解聚酯成分的情况下完全分离涤棉成分。描述了一种利用可切换溶剂系统从聚棉中分离聚酯和纤维素的回收策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Sustainable Chemistry & Engineering CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

13.80

自引率

4.80%

发文量

1470

审稿时长

1.7 months

期刊介绍： ACS Sustainable Chemistry & Engineering is a prestigious weekly peer-reviewed scientific journal published by the American Chemical Society. Dedicated to advancing the principles of green chemistry and green engineering, it covers a wide array of research topics including green chemistry, green engineering, biomass, alternative energy, and life cycle assessment. The journal welcomes submissions in various formats, including Letters, Articles, Features, and Perspectives (Reviews), that address the challenges of sustainability in the chemical enterprise and contribute to the advancement of sustainable practices. Join us in shaping the future of sustainable chemistry and engineering.