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Assessment of the papermaking potential of processed Miscanthus × giganteus stalks using alkaline pre-treatment and hydrodynamic cavitation for delignification

Ultrasonics sonochemistry, 2021-04, Vol.72, p.105462-105462, Article 105462 [Peer Reviewed Journal]

2021 The Author(s) ;Copyright © 2021 The Author(s). Published by Elsevier B.V. All rights reserved. ;2021 The Author(s) 2021 ;ISSN: 1350-4177 ;EISSN: 1873-2828 ;DOI: 10.1016/j.ultsonch.2021.105462 ;PMID: 33476967

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  • Title:
    Assessment of the papermaking potential of processed Miscanthus × giganteus stalks using alkaline pre-treatment and hydrodynamic cavitation for delignification
  • Author: Tsalagkas, Dimitrios ; Börcsök, Zoltán ; Pásztory, Zoltán ; Gogate, Parag ; Csóka, Levente
  • Subjects: Agricultural residues ; Chemical composition ; Fiber characteristics ; Non-wood pulp ; Original ; Strength properties
  • Is Part Of: Ultrasonics sonochemistry, 2021-04, Vol.72, p.105462-105462, Article 105462
  • Description: •The alkaline – HC miscanthus fibers lignin content was decreased by 41.54%•Pulp fiber shape characteristics were negatively influenced due to cavitation force.•Results could verify the efficacy of alkaline - HC pretreatment as a delignification method.•The alkaline – HC process displayed similar results with other conventional methods.•Miscanthus grass fibers could potentially substitute hardwood fibers in pulp blends. One way of satisfying increased market demand and simultaneously achieving a reduced environmental load in the industrial paper production is the use of fibrous agricultural residues. The aims of this study were i) to investigate the effect of alkaline – hydrodynamic cavitation (HC) pre-treatments on the delignification of Miscanthus × giganteus stalks (MGS) and ii) establishing the suitability of MGS as feedstock and their exploitation in pulp and paper manufacturing. It was demonstrated that the proposed treatment is an efficient delignification method for the non-wood fiber sources, such as miscanthus. A significant outcome of this work was the observation that HC treatment preserved the fibres lengths and surface quality of raw MGS, but at the same time increased the amount of kinked and curled fibers present in cavitated miscanthus fibers. The average miscanthus fiber length was found to be relatively short at 0.45 (±0.28) mm, while the slenderness ratio, the flexibility coefficient and Runkel ratio values were calculated to be 28.13, 38.16 and 1.62, respectively. The estimated physical properties of MGS pulp hand-sheets were 24.88 (±3.09) N m g−1 as the tensile index, 0.92 (±0.06) kPa m2 g−1 as the burst index and 4.0 (±0.37) mN m2 g−1 as the tear index. Overall the current work demonstrated effective use of hydrodynamic cavitation for improving the processing in pulp and paper manufacturing.
  • Publisher: Netherlands: Elsevier B.V
  • Language: English
  • Identifier: ISSN: 1350-4177
    EISSN: 1873-2828
    DOI: 10.1016/j.ultsonch.2021.105462
    PMID: 33476967
  • Source: PubMed Central
    DOAJ Directory of Open Access Journals
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