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Types of Step-Growth Polymers: Polyesters01:20

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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 polymer...
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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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作为聚/棉织品回收利用的溶液的深度环氧化溶剂.

Nika Depope1, Al Depope2, Vasiliki-Maria Archodoulaki3

  • 1Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Getreidemarkt 9/166, 1060 Vienna, Austria; JR Centre for Recovery Strategies for Textiles (ReSTex), Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Getreidemarkt 9/166, 1060 Vienna, Austria.

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概括

这项研究介绍了一种可持续的方法,用于利用深度性溶剂 (DES) 循环利用聚/棉混合物. 该工艺有效地回收PET和棉纤维,为织废物管理提供了更绿色的替代方案.

关键词:
深层欧性溶剂 深层欧性溶剂在PET溶液中溶解.聚/棉花可以使用.聚合物回收利用的方法织品回收利用 织品回收利用

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科学领域:

  • 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.
  • 环境科学 环境科学

背景情况:

  • 全球织品生产以聚 (PET) 和棉花 (CO) 为主,产生大量的废物.
  • 织行业对可持续回收解决方案的需求日益增加.
  • 目前的回收方法通常涉及有毒化学品或对混合织物无效.

研究的目的:

  • 开发一种创新和可持续的方法来回收聚/棉 (PET/CO) 混合物.
  • 使用疏水性深层浸泡溶剂 (DESs) 来有效和选择性地分离PET和CO.
  • 评估回收材料的质量和性能,以便有可能重复使用.

主要方法:

  • 使用疏水性深溶解剂 (DESs) 溶解PET/CO混合物.
  • 选择性回收PET和CO组件. 选择性回收PET和CO组件. 选择性回收PET和CO组件.
  • 使用扫描电子显微镜 (SEM),差分扫描热量计 (DSC),热重力测量分析 (TGA),减弱总反射率里埃转换红外光谱学 (ATR-FTIR) 和机械测试,对回收材料进行表征.

主要成果:

  • 在5分钟内使用DESs.完全溶解PET.
  • 高回收率:PET的回收率为97%,CO的回收率为100%.
  • SEM证实棉纤维没有发生形态损伤.
  • DSC,TGA和ATR-FTIR表明回收聚合物没有显著的化学或热降解.
  • 回收的棉花显示性 (28%) 和延长 (34%) 的降低,但仍在可用范围内.

结论:

  • 拟议的基于DES的工艺为回收PET/CO织品混合物提供了一种高效,快速和可持续的方法.
  • 这种方法避免了有毒化学品,并回收了两种具有适合制造的特性的聚合物.
  • 该过程为减少织废物和促进时尚行业循环经济提供了可行的解决方案.