Theoretical Method for Characterizing Textile Failure Mechanics in Mechanical Recycling With Carded Drums
Theoretical Method for Characterizing Textile Failure Mechanics in Mechanical Recycling With Carded Drums
复制标题
梳理滚筒机械回收中纺织品失效机理表征的理论方法
DOI：
10.1115/msec2023-104361
复制
发表时间：
2023
期刊：
影响因子：
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通讯作者：
Martini, Angela
中科院分区：
文献类型：
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作者：
Teixeira França Alves, Paulo Henrique;Clarke-Sather, Abigail;Carlson, Sam;Martini, Angela
由于家居和服装产品的生产、销售和废弃速度不断加快，纺织品的回收利用对于支持联合国负责任消费和生产的可持续发展目标至关重要。据估计，2020年，纺织品生产造成了35%的初级微塑料释放到环境中，20%的全球清洁水污染和10%的全球温室气体排放。2018年，美国产生了约1700万吨纺织废物，其中只有14.7%被回收利用。滚筒操作的纺织品切碎，一种常用的机械纺织品回收技术，尚未得到充分的表征。尽管有许多切碎机可以执行这一过程，但尚未研究影响高质量纤维产量的参数;发现提高可重复使用纤维产量的方法仍然是一个挑战。本研究探讨了梳（齿）鼓纺织品切碎的理论，包括如何提高工艺结果，以获得更多的可重复使用的纤维和更少的纺织品碎片和灰尘。描述了纺织品和纤维分别在来自滚筒和滚筒齿的拉伸和剪切应力下的力学，以将纺织品材料失效行为与切碎过程纤维输出相关联。针对喂入滚筒和切丝滚筒的相互作用，分析了滚筒-织物和切丝滚筒-纱线的失效机理。通过减小齿的尺寸和增加滚筒之间的相对速度，可以期望增加剪切破坏率，从而改善破碎系统。有了这一点，预计从回收纤维制造新的和更好的材料成为可能。
Due to the increasing speed of production, sale, and discard of home and apparel products, recycling of textiles is important for supporting the UN’s Sustainable Development Goal of Responsible Consumption and Production. In 2020, textile production was estimated to be responsible for 35% of primary microplastics released into the environment, 20% of global clean water pollution, and 10% of global greenhouse gas emissions. In 2018 the US generated around 17 million tons of textile waste and only 14.7% was recycled. Drum-operated textile shredding, a commonly utilized mechanical textile recycling technique, is not yet fully characterized. Even though there are many shredding machines that perform this process, the parameters that influence high-quality fiber output have not been researched; discovering ways to improve reusable fiber output is still a challenge. This research investigates the theory behind carded (toothed) drum textile shredding including how to improve the process outcome in order to obtain more reusable fiber and fewer textile pieces and dust. The mechanics of the textiles and fibers under tensile and shear stresses from the drums and drum teeth respectively were described to relate the textile material failure behavior to shredding process fiber outputs. Focusing on the interactions of the feeding drums and shredding drum, the drum-textile and tooth-yarn failure mechanics were characterized. By decreasing the teeth size and increasing the relative speed between drums, it is expected to increase the shear failure ratio, thus improving the shredding system. With this, it is expected that manufacturing new and better materials from recycled fibers becomes a possibility.