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Locust bean gum adsorption onto softwood kraft pulp fibres: isotherms, kinetics and paper strength

Cellulose (London), 2021-11, Vol.28 (16), p.10183-10201 [Peer Reviewed Journal]

The Author(s) 2021 ;The Author(s) 2021. ;The Author(s) 2021. 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. ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-021-04133-w ;PMID: 34759467

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  • Title:
    Locust bean gum adsorption onto softwood kraft pulp fibres: isotherms, kinetics and paper strength
  • Author: Chen, Jingqian ; Beatson, Rodger P. ; Trajano, Heather L.
  • Subjects: Adsorption ; Bioorganic Chemistry ; Bleaching ; Bonding strength ; Bursting strength ; Ceramics ; Chemisorption ; Chemistry ; Chemistry and Materials Science ; Composites ; Glass ; Heterogeneity ; Isotherms ; Kinetics ; Kraft pulp ; Locust bean gum ; Multilayers ; Natural Materials ; Organic Chemistry ; Original Research ; Physical Chemistry ; Polymer Sciences ; Pulp & paper mills ; Surface chemistry ; Sustainable Development
  • Is Part Of: Cellulose (London), 2021-11, Vol.28 (16), p.10183-10201
  • Description: The adsorption of locust bean gum (LBG) onto Northern Bleached Softwood Kraft (NBSK) pulp improved paper tensile and burst strength and lowered refining energy by strengthening inter-fibre bonding. Adsorption kinetics and isotherms were investigated to develop a fundamental understanding of the adsorption mechanism. The adsorption rate followed pseudo-second-order kinetics and the activation energy was 99.34 kJ·mol −1 , suggesting chemisorption. The adsorption rate constant increased rapidly with temperature from 25 to 45 °C ( k  = 1.93 to 24.03 g·mg −1 ·min −1 ), but the amount adsorbed at equilibrium decreased ( q e  = 1.91 to 0.48 mg·g −1 o.d. fibre). LBG adsorption to NBSK at 25 °C was consistent with the Langmuir adsorption model for LBG < 2.1 wt% of o.d. fibre, suggesting reversible, homogenous adsorption to a finite number of sites on the fibre surface. Refining to 3000 rev increased the heterogeneity of the NBSK pulp surface leading to multi-layer Freundlich adsorption with adsorption constant n  = 5.00, and the equilibrium constant K f  = 2.57 mg·g −1 ·(mg·L −1 ) −1/n at 25 °C. Favorable adsorption conditions for negatively charged LBG were identified: 25 °C for 10 min, low dosage level (< 2 wt%), lightly refined (< 3000 rev) NBSK pulp at low fibre consistency (< 0.5 wt%), high agitation rate (> 150 r.p.m.), acidic or neutral conditions (pH 2–7) without salt addition. Graphic abstract
  • Publisher: Dordrecht: Springer Netherlands
  • Language: English
  • Identifier: ISSN: 0969-0239
    EISSN: 1572-882X
    DOI: 10.1007/s10570-021-04133-w
    PMID: 34759467
  • Source: SpringerOpen
    ProQuest Central
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