Infrared Emission Spectroscopic Imaging of Microplastics Using Long-Wavelength Infrared Hyperspectral Camera with Imaging-Type Two-Dimensional Fourier Spectroscopy
Infrared Emission Spectroscopic Imaging of Microplastics Using Long-Wavelength Infrared Hyperspectral Camera with Imaging-Type Two-Dimensional Fourier Spectroscopy
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DOI：
10.1109/whispers52202.2021.9484030
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
Kosuke Nogo;K. Ikejima;W. Qi;Tomoya Kitazaki;H. Kanasaki;K. Hamada;Kenji Wada;A. Nishiyama;I. Ishimaru
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文献类型：
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作者：
Kosuke Nogo;K. Ikejima;W. Qi;Tomoya Kitazaki;H. Kanasaki;K. Hamada;Kenji Wada;A. Nishiyama;I. Ishimaru
我们的目标是通过使用在长波红外（LWIR）波段成像的高光谱相机来实现微塑料鉴别系统，这将比基于焦平面阵列的傅里叶变换红外光谱（FPA-FTIR）更小，更便宜，更快。我们尝试对在铝板上加热的35 μ m厚的聚乙烯（PE）和聚丙烯（PP）（铝板表面温度：103.7 °C）进行LWIR波段（波数范围：714-1250 cm−1）发射光谱成像，希望能够一致地应用于尺寸范围广泛的微塑料。确认PE和PP表现出比铝板更高的亮度。实验还证实了PE和PP的红外发射光谱在与参考吸收光谱相同的位置上产生了特征峰，k-means++方法的聚类结果显示了铝板、PE和PP之间良好区分的可能性。
We aim to realize a microplastic discrimination system, by using a hyperspectral camera that images in the longwave infrared (LWIR) band, which would be smaller, cheaper and faster than focal plane array-based Fourier-transform infrared spectroscopy (FPA-FTIR). We attempt to perform LWIR band (wavenumber range: 714–1250 cm−1) emission spectroscopic imaging of 35-μm-thick polyethylene (PE) and polypropylene (PP) heated on an aluminum plate (surface temperature of aluminum plate: 103.7 °C), in the hope for a consistent application to microplastics with a wide size range. It is confirmed that PE and PP exhibit a higher brightness than the aluminum plate. It is also confirmed that the infrared emission spectra of PE and PP produce characteristic peaks at the same positions as those in the reference absorption spectra, and the clustering results by the k-means++ method reveal the possibility for good discrimination among the aluminum plate, PE and PP.