电子束处理作为一种有前途的工具,用于消毒含有化阻燃剂的聚合物
Rachida Khadidja Benmammar1, Venkateswara Rao Mundlapati2, Zohra Bouberka3
1Unité Matériaux et Transformations (UMET), UMR 8207, CNRS, INRAE, Université de Lille, 59000 Lille, France.
Molecules (Basel, Switzerland)
|December 9, 2023
概括
电子束 (EB) 辐射有效降解DecaBromoDiphenylEther (DBDE),一个有毒的制阻燃剂 (BFR),在烯-丁-烯 (ABS) 和聚碳酸盐 (PC) 塑料中. 这种方法通过去除有害添加剂来对电子废物 (电子废物) 进行净化是有希望的.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学 化学 化学
背景情况:
- 废弃电气和电子设备 (WEEE) 含有危险的制阻燃剂 (BFR).
- 甲二乙烯 (DBDE) 是一种普遍存在且有毒的BFR,在聚合物中发现,如烯-丁-烯 (ABS) 和聚碳酸 (PC).
- 需要有效的方法来消毒这些聚合物并减轻环境风险.
研究的目的:
- 研究电子束 (EB) 辐射在ABS和PC聚合物矩阵内降解DBDE的有效性.
- 评估EB辐射对ABS和PC的热性能和结构完整性的影响.
- 探索EB辐射作为一种潜在的解决方案,用于消除电子废物的塑料成分的污染.
主要方法:
- 将ABS-DBDE和PC-DBDE模型系统暴露在不同剂量的EB辐射中.
- 使用富里埃变换红外光谱法 (FTIR) 分析DBDE降解.
- 通过差分扫描热量测量 (DSC) 和热重力测量分析 (TGA) 评估聚合物热性质.
- 使用高分辨率质谱测量确认除.
主要成果:
- 在ABS中达到87%的DBDE降解,在PC中达到91%的DBDE降解,辐射剂量为1800kGy.
- 在ABS中观察到聚合物交叉连接,PC的玻璃过渡温度略有下降.
- 通过质谱测量证实了两种聚合物系统的显著除.
- 证明EB辐射不会对聚合物的整体热稳定性产生不利影响.
结论:
- EB辐射是一种高效的方法,用于降解ABS和PC聚合物中的有毒DBDE.
- 该过程导致除,但不影响塑料的基本热性能.
- EB辐射是一种有希望的,环保的方法,用于处理受BFR污染的塑料电子废物.
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