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Cellulose

, Volume 25, Issue 12, pp 6989–7002 | Cite as

A new approach to improve dissolving pulp properties: spraying cellulase on rewetted pulp at a high fiber consistency

  • Jianguo Li
  • Shaokai Zhang
  • Hailong Li
  • Kaixin Huang
  • Linqiang Zheng
  • Xinhua Ouyang
  • Qinghong Zheng
  • Liulian Huang
  • Lihui Chen
  • Yonghao Ni
Original Paper
  • 117 Downloads

Abstract

Cellulase treatment is a promising technology that will increase the reactivity of a prehydrolysis kraft (PHK) dissolving pulp. In this study, a cellulase solution was sprayed onto rewetted pulp at a very high consistency (about 60%) to increase its Fock reactivity with high efficiency and low cost. This novel and facile approach is based on favorable cellulose adsorption onto pulp fibers and high cellulose concentration at the reaction sites. Consequently, the enzymatic reactions towards cellulose fibers are more effective, thus a higher enzymatic performance in comparison with the conventional process. With the cellulase spraying technique under the conditions of 60% fiber consistency and 1.5 mg/g cellulase dosage at 12 h, the Fock reactivity of a PHK dissolving pulp increased from 51.22 to 82.64% with acceptable viscosity (469 mL/g). Herein, the proposed cellulase spraying technology is flexible and readily implementable in practice.

Graphical abstract

Keywords

High fiber consistency Cellulase spraying Reactivity Fiber morphologies Dissolving pulp 

Notes

Acknowledgments

The authors are grateful for the National Natural Science Foundation of China (Grant No. 31700520), the National key research and development plan (Grant No. 2017YFB0307900), the Natural Science Foundation of Fujian Province (Grant No. 2018J05040), the Distinguished Young Scholars of Fujian Agriculture and Forestry University (No. xjq201729) and the Foundation of Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education/Shandong Province of China (No. KF201625).

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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Jianguo Li
    • 1
    • 2
    • 3
  • Shaokai Zhang
    • 1
    • 2
  • Hailong Li
    • 2
    • 4
  • Kaixin Huang
    • 1
  • Linqiang Zheng
    • 2
  • Xinhua Ouyang
    • 1
  • Qinghong Zheng
    • 1
  • Liulian Huang
    • 1
  • Lihui Chen
    • 1
  • Yonghao Ni
    • 1
    • 2
  1. 1.College of Material EngineeringFujian Agriculture and Forestry UniversityFuzhouChina
  2. 2.Department of Chemical Engineering, Limerick Pulp and Paper CentreUniversity of New BrunswickFrederictonCanada
  3. 3.Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education/Shandong ProvinceQilu University of TechnologyJinanChina
  4. 4.Tianjin Key Laboratory of Pulp and PaperTianjin University of Science and TechnologyTianjinChina

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