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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
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冲洗后的生物降解湿巾真的会降解吗?

Thomas Allison1, Benjamin D Ward2, Michael Harbottle3

  • 1School of Biosciences and Water Research Institute, Cardiff University, Cardiff, CF10 3AX, United Kingdom.

The Science of the total environment
|June 19, 2023
PubMed
概括

大多数"可生物降解和可冲洗"的湿巾并不真正降解. 它们的生产通常包括合成纤维和添加剂,导致环境中的微纤维持续存在,而不是分解.

关键词:
纤维素纤维素是一种纤维素.降解降解是一种降解.环境的命运环境的命运生命周期生命周期制造业属性 制造业属性微纤维是一种微纤维.

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科学领域:

  • 环境科学 环境科学
  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 作为生物降解和可冲洗的消费者湿巾在市场上出现了显著的市场增长.
  • 尽管纤维素组成,但这些纸巾在环境中持续存在,类似于合成替代品,这引发了关于其降解的问题.
  • 人们对这些广泛使用的产品对环境的影响存在担忧.

研究的目的:

  • 为了研究纤维素湿巾在整个生命周期中的物理化学组成和降解行为.
  • 了解制造工艺和环境条件如何影响废水和淡水系统中湿巾的分解.
  • 评估"可生物降解和可冲洗"的湿巾在处理后是否真正降解.

主要方法:

  • 湿巾纤维的物理化学成分分析,包括纤维素和合成成分.
  • 评估环境相互作用和退化过程,从生产到环境命运.
  • 在模拟废水和淡水环境中降解的评估.

主要成果:

  • 超过50%的"可生物降解和可冲洗"湿巾含有可生物降解纤维素和低降解合成纤维.
  • 用于增强性能的化学添加剂可以阻碍降解过程.
  • 纤维素纤维在物理上碎片化,但具有有限的分子降解,形成持久的微纤维.

结论:

  • 目前,大多数冲洗的"可生物降解和可冲洗"湿巾在环境中不会显著降解.
  • 制造性质和环境条件不佳阻碍了湿巾纤维的分解.
  • 需要对现场降解和全生命周期方法进行进一步的实证研究,以进行湿 wipe 评估.