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Water retention and physical properties of recycled fibers treated with NaOH/urea aqueous solution

IOP conference series. Materials Science and Engineering, 2018-07, Vol.392 (3), p.32012 [Peer Reviewed Journal]

Published under licence by IOP Publishing Ltd ;2018. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 1757-8981 ;ISSN: 1757-899X ;EISSN: 1757-899X ;DOI: 10.1088/1757-899X/392/3/032012

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  • Title:
    Water retention and physical properties of recycled fibers treated with NaOH/urea aqueous solution
  • Author: Miao, Yingju ; Chen, Ying ; Jia, Qingming ; Bai, Zhiling ; Shi, Kaiyi
  • Subjects: Aqueous solutions ; Fibers ; Hydrogen bonding ; Hydrogen bonds ; Physical properties ; Regeneration ; Sheets ; Sulfuric acid ; Ureas ; Wetting
  • Is Part Of: IOP conference series. Materials Science and Engineering, 2018-07, Vol.392 (3), p.32012
  • Description: Irreversible hydrogen bonding is the most widely recognized mechanism of fiber hornification, and NaOH/urea aqueous solution can break the inter- and intramolecular hydrogen bonds of cellulose. In order to investigate whether or not this solution system reverses the hornification of fibers that repeatedly underwent wetting and drying, we studied the degree of hornification of repaired fibers, which have been treated with NaOH/urea aqueous solution and regenerated in H2SO4/Na2SO4 aqueous solution, and we analyzed the physical properties of the resulting paper sheets. The water retention value (WRV) of the repaired fibers was equivalent to that of virgin pulp, and the hornification has been thoroughly reversed. The physical properties of the resulting paper sheets have improved, especially the tear and burst indexes, which have approximately doubled. Moreover, the dissolution/regeneration process slightly inhibited the degree of fiber hornification and increased the cycle number of the recycled fibers.
  • Publisher: Bristol: IOP Publishing
  • Language: English
  • Identifier: ISSN: 1757-8981
    ISSN: 1757-899X
    EISSN: 1757-899X
    DOI: 10.1088/1757-899X/392/3/032012
  • Source: IOP Publishing Free Content
    IOPscience (Open Access)
    GFMER Free Medical Journals
    ProQuest Central
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