An Eco-friendly Approach for the Separation and Reusage of Pre-consumer Polycotton Textile Waste

IF 4.7 3区工程技术 Q2 ENGINEERING, ENVIRONMENTAL

Journal of Polymers and the Environment Pub Date : 2025-01-30 DOI:10.1007/s10924-025-03500-z

Fábio Pedroso de Lima, Cátia Alves, Rita Gomes-Dias, Marta Fernandes, Bárbara Vieira, Rui Rodrigues, Jorge Padrão, Andrea Zille

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引用次数: 0

Abstract

One of the most challenging features of textile recycling is the widespread use of mixed fibre blends, which hardens the task of effective separation. A mixture of aqueous sodium hydroxide and a cosolvent was applied to a polycotton pre-consumer fabric to promote the chemical separation of polyester (PES) and cotton (CO). The feasibility of reusing the hydrolytic solutions was tested, where dimethyl sulfoxide (DMSO) and 2-propanol allowed the reusage of the hydrolytic solution for up to 3 consecutive cycles when applied to pristine material. The recovery of pure terephthalic acid (TPA), after treatment at 50 °C followed by vacuum filtration, achieved yields ranging from 65 to 69%. No further purification was required in 75% of the tested conditions. Through this environmentally sustainable procedure, a method was proposed that could facilitate the development of a scalable process for the TPA recovery from polycotton textiles. This approach aims to reduce both textile waste production and the need for the de novo synthesis of TPA.

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分离和再利用消费前聚酯棉纺织品废料的环保方法

纺织品回收最具挑战性的特点之一是混合纤维的广泛使用，这使得有效分离的任务变得更加艰巨。将氢氧化钠水溶液与助溶剂的混合物应用于涤棉预消费织物中，以促进涤纶（PES）与棉（CO）的化学分离。重复使用水解溶液的可行性进行了测试，其中二甲基亚砜（DMSO）和2-丙醇允许重复使用水解溶液长达3个连续循环时，应用于原始材料。经过50°C处理和真空过滤后，纯对苯二甲酸（TPA）的回收率为65%至69%。在75%的测试条件下不需要进一步纯化。通过这一环境可持续的过程，提出了一种方法，可以促进开发可扩展的工艺，从涤棉纺织品中回收TPA。这种方法旨在减少纺织废料的产生和重新合成TPA的需要。

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来源期刊

Journal of Polymers and the Environment 工程技术-高分子科学

CiteScore

9.50

自引率

7.50%

发文量

297

审稿时长

9 months

期刊介绍： The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.