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Reversed double-beam photoacoustic spectroscopic analysis of photoinduced change in absorption of cellulose fibres

Scientific reports, 2022-08, Vol.12 (1), p.14475-14475, Article 14475 [Peer Reviewed Journal]

The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;The Author(s) 2022 ;ISSN: 2045-2322 ;EISSN: 2045-2322 ;DOI: 10.1038/s41598-022-18749-w ;PMID: 36008458

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  • Title:
    Reversed double-beam photoacoustic spectroscopic analysis of photoinduced change in absorption of cellulose fibres
  • Author: Csóka, Levente ; Hosakun, Worakan ; Kolonics, Ottó ; Ohtani, Bunsho
  • Subjects: Cellulose ; Fibers ; Glucose ; Hardwoods ; Hydrogen ; Light effects ; Light emitting diodes ; Lignin ; Nitrogen ; Physical properties ; Pulp & paper mills ; Spectroscopy ; Spectrum analysis
  • Is Part Of: Scientific reports, 2022-08, Vol.12 (1), p.14475-14475, Article 14475
  • Description: Abstract Photoabsorption properties of cellulose fibres under continuous and modulated irradiation were investigated in situ by the use of reversed double-beam photoacoustic spectroscopy (RDB-PAS). This photoacoustic (PA) measurement enabled observation of ultraviolet- and visible light-induced, electron trap filling, and reductive change on the surface of the fibres. Energy-resolved measurements and analysis of the kinetics of photoinduced de-excitation suggested that electrons that accumulated in the different cellulose crystalline phases had moderate reactivity toward molecular oxygen. Saturation limits of the intensities of the PA and RDB-PAS signals under de-aerated conditions in the presence of surface-adsorbed methanol were estimated for softwood and hardwood cellulose samples. The results suggest that the RDB-PAS technique is a feasible method for the estimation of the electron trap distribution, which is a potential measure of the density of crystalline cellulose defects.
  • Publisher: London: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 2045-2322
    EISSN: 2045-2322
    DOI: 10.1038/s41598-022-18749-w
    PMID: 36008458
  • Source: PubMed Central (Open access)
    ProQuest Central
    DOAJ Directory of Open Access Journals
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