加拿大建筑产品中的非聚合物Per-和多醇基物质 (PFAS) 和侧链化聚合物
Min Liu1,2,3, Chunjie Xia4, Hui Peng2,5
1Department of Earth Sciences, University of Toronto, Toronto, Ontario M5S 3B1, Canada.
Environmental science & technology
|September 17, 2025
概括
外部建筑产品,如涂料,密封剂和织品是 perfluoroalkyl 和 polyfluoroalkyl 物质 (PFAS) 的来源. 这项研究发现了这些化学物质的大量含量,表明建筑材料有助于环境PFAS污染.
科学领域:
- 环境化学环境化学
- 聚合物科学 聚合物科学
- 分析化学 分析化学
背景情况:
- perfluoroalkyl和 polyfluoroalkyl物质 (PFAS) 在消费和工业产品中广泛使用.
- 人们对来自不同来源的PFAS对环境的释放和影响存在担忧.
- 建筑材料对环境PFAS负荷的贡献尚未完全理解.
研究的目的:
- 调查外部建筑产品是否成为环境中PFAS的来源.
- 为了识别和量化特定类型的PFAS存在于油漆,密封剂和织品.
- 评估PFAS从这些建筑材料中释放到环境中的潜力.
主要方法:
- 开发一种组合的1D和2D-DOSYFNMR方法用于PFAS的表征.
- 分析了145个用于室外涂料,密封剂和织品的样本.
- 使用先进的质谱仪进行详细的PFAS识别.
主要成果:
- 36%的油漆,24%的密封剂和70%的织品含有大量的总有机 (TOF).
- 识别了各种非聚合物PFAS和侧链化聚合物 (SCFP),包括基于体的物质和基于PBSF的PFAS.
- 确定的特定PFAS包括6:2 FT,8:2 FT,甲基酸 (PAP),甲基醇 (FTOH) 和MeFBSE.
结论:
- 外部建筑产品,包括涂料,密封剂和织品,含有大量的聚合物和非聚合物PFAS.
- 这些建筑材料可能是PFAS对环境负担的贡献者.
- 需要进一步的研究来量化这些产品的释放率和环境命运.
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