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Terahertz time-domain spectroscopy as a novel tool for crystallographic analysis in cellulose: tracking lattice changes following physical treatments

Cellulose (London), 2024-05, Vol.31 (7), p.4085-4098 [Tạp chí có phản biện]

The Author(s) 2024 ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-024-05834-8

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  • Nhan đề:
    Terahertz time-domain spectroscopy as a novel tool for crystallographic analysis in cellulose: tracking lattice changes following physical treatments
  • Tác giả: Wang, Han ; Aoki, Dan ; Teramoto, Yoshikuni ; Tsuchikawa, Satoru ; Inagaki, Tetsuya
  • Chủ đề: Bioorganic Chemistry ; Ceramics ; Chemistry ; Chemistry and Materials Science ; Composites ; Glass ; Natural Materials ; Organic Chemistry ; Original Research ; Physical Chemistry ; Polymer Sciences ; Sustainable Development
  • Là 1 phần của: Cellulose (London), 2024-05, Vol.31 (7), p.4085-4098
  • Mô tả: The authors’ series of studies aimed to explore the potential of terahertz time-domain spectroscopy (THz-TDS) in cellulose crystallographic studies, since THz radiation can detect most intermolecular vibrations and respond to lattice phonons. In this study, we tracked changes in four types of cellulose after ball milling. As the planetary ball milling time increases, it is observed through electron microscopy that the four types of cellulose particles are gradually destroyed into finer particles, while gel permeation chromatography can prove that the molecular weight gradually decreases after ball milling and the dispersity gradually approaches one, which indicates that the dispersion of the material was reduced. The most fascinating observation was made by THz-TDS, that is we have confirmed that after ball milling, the absorption characteristics of cellulose I and II in cellulose I treated with 10% NaOH (crystalline partial transition from cellulose I to II) exhibited an opposite trend. Specifically, the absorption of cellulose II at 2.40THz and 2.77THz increased, while the absorption of cellulose I at 2.11THz and 3.04THz decreased after ball milling, which suggests an increased conversion rate of cellulose I to cellulose II post-milling. Cellulose with different crystalline allomorphs shows different characteristic absorption in the THz region, and the peak position will not change even after the ball milling, only the absorption intensity changes. Although it can be observed through the most traditional X-ray diffraction method that the crystallinity index of all cellulose samples gradually decreases after ball milling. However, different from the THz results, the change after ball milling of cellulose I treated with 10% NaOH is only reflected in very subtle pattern changes, that is, the peak close to the 200 crystalline plane position is slightly shifted after ball milling.
  • Nơi xuất bản: Dordrecht: Springer Netherlands
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0969-0239
    EISSN: 1572-882X
    DOI: 10.1007/s10570-024-05834-8
  • Nguồn: Springer Nature OA/Free Journals
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