应用化学 ›› 2025, Vol. 42 ›› Issue (8): 1070-1077.DOI: 10.19894/j.issn.1000-0518.250073

• 研究论文 • 上一篇    下一篇

原子力-红外光谱技术检测单个微纳塑料粒子

方慧瑶1,2, 林园1(), 苏朝晖1,2()   

  1. 1.中国科学院长春应用化学研究所,高分子科学与技术全国重点实验室,长春 130022
    2.中国科学技术大学应用化学与工程学院,合肥 230026
  • 收稿日期:2025-02-25 接受日期:2025-05-26 出版日期:2025-08-01 发布日期:2025-08-11
  • 通讯作者: 林园,苏朝晖
  • 基金资助:
    国家自然科学基金(52073277)

Application of Atomic Force Microscopy-Infrared for Single Micro- and Nanoplastics

Hui-Yao FANG1,2, Yuan LIN1(), Zhao-Hui SU1,2()   

  1. 1.State Key Laboratory of Polymer Science and Technology,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    2.School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China
  • Received:2025-02-25 Accepted:2025-05-26 Published:2025-08-01 Online:2025-08-11
  • Contact: Yuan LIN,Zhao-Hui SU
  • About author:linyuan@ciac.ac.cn
  • Supported by:
    the National Natural Science Foundation of China(52073277)

摘要:

微纳塑料作为新污染物,有关微纳塑料粒子的识别与鉴定已得到广泛关注。 本研究采用原子力-红外光谱(AFM-IR)技术,对研磨法制备的聚丙烯(Polypropylene, PP)微纳塑料进行单颗粒表征与分析。 结果表明,AFM-IR技术不仅能精确表征聚丙烯微纳塑料单颗粒的形貌和尺寸分布,还可通过红外光谱准确解析其化学组成信息。 进一步利用AFM-IR技术对从海滩环境中采集的老化微纳塑料粒子进行分析,成功鉴定了聚丙烯和聚二甲基硅氧烷(Polydimethylsiloxane, PDMS)的存在。 此外,红外光谱在1720 cm-1处观察到CO吸收峰,表明老化微塑料发生了氧化反应,与未老化塑料的光谱特征存在显著差异。 本研究为微塑料和纳米塑料的高精度检测提供了新方法,并为评估其环境行为与生态风险奠定了技术基础。

关键词: 聚丙烯, 微塑料, 纳米塑料, 原子力-红外光谱

Abstract:

As emerging pollutants the recognition and identification of micro/nano plastic particles has received extensive attention. In this study, atomic force microscopy-infrared spectroscopy (AFM-IR) was employed to characterize and analyze individual polypropylene (PP) micro- and nanoplastic particles prepared by grinding. The results demonstrate that AFM-IR not only precisely characterizes the morphology and size distribution of individual PP particles but also accurately resolves their chemical composition through infrared spectroscopy. Furthermore, AFM-IR was utilized to analyze aged microplastics and nanoplastics collected from beach environments, successfully identifying the presence of PP and polydimethylsiloxane (PDMS) particles. Additionally, the observation of a CO absorption peak at 1720 cm-1 in the infrared spectra indicates oxidation reactions in aged microplastics, revealing significant differences compared to the spectral features of unaged plastics. This study provides a novel approach for the high-precision detection of microplastics and nanoplastics and lays a technical foundation for assessing their environmental behavior and ecological risks.

Key words: Polypropylene, Microplastic, Nanoplastic, Atomic force microscopy-infrared

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