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Sheet sealing in single and multilayer nanopapers

Cellulose (London), 2022-09, Vol.29 (14), p.7663-7676 [Peer Reviewed Journal]

The Author(s) 2022 ;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. ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-022-04751-y

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  • Title:
    Sheet sealing in single and multilayer nanopapers
  • Author: Ahadian, Hamidreza ; Sharifi Zamani, Elaheh ; Phiri, Josphat ; Coelho, Miguel Alexandre Salvador ; Maloney, Thaddeus
  • Subjects: Bioorganic Chemistry ; Cellulose ; Ceramics ; Chemistry ; Chemistry and Materials Science ; Composites ; Glass ; Monolayers ; Multilayers ; Natural Materials ; Organic Chemistry ; Original Research ; Papermaking ; Permeability ; Physical Chemistry ; Polymer Sciences ; Sealing ; Sustainable Development
  • Is Part Of: Cellulose (London), 2022-09, Vol.29 (14), p.7663-7676
  • Description: This study addresses one of the limiting factors for producing micro and nanofibrillated cellulose (MNFC)-containing papers: poor water removal properties. We focus on the sheet sealing phenomenon during dewatering. A modified dynamic drainage analyzer (DDA) is used to examine both multilayer and single layer forming of MNFC and pulp mixtures. It was found that a thin layer of pulp fibers on the exit layer with the grammage as low as 5 gsm was enough to significantly improve the dewatering of MNFC. For example, the dewatering rate of a furnish with 50% MNFC increased from 0.6 mL/s for a mixed system to 2 mL/s for multilayer system. However, the sheet sealing behavior was completely different when a lower proportion of MNFC was used. For the furnishes with less than 20% MNFC content, the mixed furnishes dewatered faster because the high amount of pulp fibers were able to prevent MNFC from enriching on the exit layer. Surprisingly, we found that very high final solids content (couch solids) could sometimes be achieved when MNFC was used. The highest solids contents achieved were 34 and 29% for the mixed systems. This compares to the 15–20% range typical of standard papermaking furnishes without MNFC. Overall, the results show that contrary to current thinking MNFC containing papers may lead, under some circumstances, to enhanced wire section dewatering.
  • Publisher: Dordrecht: Springer Netherlands
  • Language: English
  • Identifier: ISSN: 0969-0239
    EISSN: 1572-882X
    DOI: 10.1007/s10570-022-04751-y
  • Source: Springer Nature OA/Free Journals
    ProQuest Central
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