Ramification of dyes for fiber-to-fiber recycling of cotton textiles

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-06-12 DOI:10.1016/j.resconrec.2025.108454

Yuanyi Shao , Bingnan Mu , Xiaoqing Yu , Yiqi Yang

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Abstract

We investigated the ramification of dyes for dissolution and extrusion of cellulosics, and for the properties of regenerated cellulosic fibers from waste cotton via the Lyocell process and proposed pivotal solutions to the challenges of dyes on cotton recycling. Dyed fibers cannot be regenerated to new fibers with acceptable performance properties via direct re-extrusion since the dyes inside fibers diminish the extrudability of the spinning dopes and the quality of the re-extruded fibers. Dissolving cellulose to make wet-spun fibers is the best option for the recycling of cellulosics. Hence, understanding and addressing the influences of dyes, including those after bleaching, on extrudability and property of the regenerated textiles, and the importance of non-destructive dye removal are vital to the success of cotton recycling. A green technology for recycling cotton via dye removal was proposed. Using this technology, cotton pulp was produced with environmental and economic benefits compared to wood pulp.

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棉织物纤维对纤维回收中染料衍生物的研究

我们研究了染料对纤维素的溶解和挤压的影响，以及通过Lyocell工艺从废棉花中再生的纤维素纤维的性能，并提出了解决染料对棉花回收的挑战的关键解决方案。由于纤维内部的染料降低了纺丝纤维的可挤压性和再挤压纤维的质量，因此染色纤维不能通过直接再挤压再生成具有可接受性能的新纤维。溶解纤维素制成湿纺纤维是纤维素回收的最佳选择。因此，了解和解决染料（包括漂白后的染料）对再生纺织品的可挤压性和性能的影响，以及无损脱除染料的重要性，对棉花回收的成功至关重要。提出了一种脱色法回收棉花的绿色工艺。与木浆相比，采用该工艺生产的棉浆具有环境效益和经济效益。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.