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Effect of pre-hydrolysis on the dissolution of hardwood pulp in double salt ionic liquid

  • M. Mahbubur Rahman , Md. Abu Bin Hasan Susan ORCID logo , Md. Mominul Islam and M. Sarwar Jahan ORCID logo EMAIL logo
Published/Copyright: August 9, 2024
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Nordic Pulp & Paper Research Journal
From the journal Nordic Pulp & Paper Research Journal Volume 39 Issue 4

Abstract

Ionic liquids (ILs) are potentially alternative solvents for cellulose dissolution. In this article, effect of hemicellulose in cellulose dissolution in ILs and the regeneration process were investigated. Hardwood pulps were produced by kraft (KP) and pre-hydrolysis kraft (PHKP) processes. The α-cellulose and residual pentosan contents were 95.6 % and 4.2 % in PHKP and 84.3 % and 9.9 % in KP, respectively. Both pulps were dissolved in 1-butyl-3-methylimidazolium chloride [C4mim]Cl, 1-butyl-3-methylimidazolium acetate [C4mim]CH3CO2 and their double salt (DSIL), [C4mim](CH3CO2)0.6Cl0.4 at 90 °C. It was observed that PHKP had slightly higher solubility in both ILs and DSIL. The dissolved pulps were regenerated by water and characterized by FTIR, TGA, X-ray diffraction, and viscosity. Regenerated pulp film formed smooth and homogenous surface. The viscosity of regenerated PHKP was higher than the original PHKP, which affected the strength of the produced cellulose film. As observed in FTIR, the regenerated cellulose showed a stronger absorption band at 1,647 cm−1 corresponding to the C–O stretching vibration of C–O–H. The crystalline structures of regenerated KP and PHKP from [C4mim](CH3CO2)0.6Cl0.4 changed to cellulose II form from the original cellulose I form.

Keywords: prehydrolysis; double salt ionic liquid; cellulose regeneration; crystallinity; viscosity
Corresponding author: M. Sarwar Jahan, Bangladesh Council of Scientific and Industrial Research, Dr. Qudrat-i-Khuda Road, Dhaka 1205, Bangladesh, E-mail:

Acknowledgments

Authors wish to thank Ministry of Science and Technology for providing necessary fund to carry out this research.

  1. Research ethics: Not applicable.

  2. Author contributions: M. Mahbubur Rahman: Investigation, Methodology, Formal analysis, data analysis, Writing – original draft and editing; Md Abu Bin Hasan Susan Supervision, Funding acquisition, Writing – review and editing; Md. Mominul Islam: Supervision, Writing – review and editing; M. Sarwar Jahan: Idea generation, Conceptualization, Supervision, Validation, Funding acquisition, Supervision, Writing – review and editing.

  3. Competing interests: There is no competing interest in this works.

  4. Research funding: Ministry of Science and Technology, Government of Bangladesh.

  5. Data availability: Not applicable.

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Received: 2024-04-21
Accepted: 2024-08-01
Published Online: 2024-08-09
Published in Print: 2024-12-17

© 2024 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Chemical Pulping
  3. Evaluation of oxygen delignified fibers with high water absorbency, as a greener alternative to fully bleached fibers for tissue paper
  4. Effects of partial lignin extraction on rheological characteristics and combustion performance of high solids bamboo kraft black liquor
  5. A preliminary investigation of banana pseudo-stem (Musa cavendish) for pulp and paper production: morphology, chemical composition, FTIR, XRD and thermogravimetric analysis
  6. Sodium carbonate pulping of oil palm empty fruit bunches for paperboard production
  7. Mechanical Pulping
  8. Development of fibre properties in mill scale: high- and low consistency refining of thermomechanical pulp (part 2) – Importance of fibre curl
  9. Paper Technology
  10. Multi-objective optimization design of a circular core paper sandwich panel
  11. Paper Physics
  12. Effects of xylan-modified precipitated calcium carbonate filler on the properties of paper
  13. Influence mechanism of paper mechanical properties: numerical simulation and experimental verification based on a fiber network
  14. Enhancing the strength of tissue paper through pulp fractionation and stratified forming
  15. Paper Chemistry
  16. Effects of surfactants on the wettability of sodium propionate aqueous deacidification agent
  17. Coating
  18. Biobased nanocomposite coating of paper for packaging
  19. Printing
  20. Improving the lightfastness of paperboard prints with pearlescent pigments
  21. Packaging
  22. Preparation of environmentally friendly hydrophobic paper by coating method
  23. Recycling
  24. Hybrid solar drying of sludge from kraft pulp mills
  25. Chemical Technology/Modifications
  26. Effect of pre-hydrolysis on the dissolution of hardwood pulp in double salt ionic liquid
  27. Lignin
  28. Comparison of three different industrial lignin-based porous carbon electrodes for electrochemical applications
  29. UV–vis spectroscopy as a rapid method for evaluation of total phenolic hydroxyl structures in lignin
  30. Miscellaneous
  31. Paper fingerprint by forming fabric: analysis of periodic marks with 2D lab formation sensor and machine learning for forensic paper-identification
https://doi.org/10.1515/npprj-2024-0031
Keywords for this article
prehydrolysis; double salt ionic liquid; cellulose regeneration; crystallinity; viscosity

Articles in the same Issue

  1. Frontmatter
  2. Chemical Pulping
  3. Evaluation of oxygen delignified fibers with high water absorbency, as a greener alternative to fully bleached fibers for tissue paper
  4. Effects of partial lignin extraction on rheological characteristics and combustion performance of high solids bamboo kraft black liquor
  5. A preliminary investigation of banana pseudo-stem (Musa cavendish) for pulp and paper production: morphology, chemical composition, FTIR, XRD and thermogravimetric analysis
  6. Sodium carbonate pulping of oil palm empty fruit bunches for paperboard production
  7. Mechanical Pulping
  8. Development of fibre properties in mill scale: high- and low consistency refining of thermomechanical pulp (part 2) – Importance of fibre curl
  9. Paper Technology
  10. Multi-objective optimization design of a circular core paper sandwich panel
  11. Paper Physics
  12. Effects of xylan-modified precipitated calcium carbonate filler on the properties of paper
  13. Influence mechanism of paper mechanical properties: numerical simulation and experimental verification based on a fiber network
  14. Enhancing the strength of tissue paper through pulp fractionation and stratified forming
  15. Paper Chemistry
  16. Effects of surfactants on the wettability of sodium propionate aqueous deacidification agent
  17. Coating
  18. Biobased nanocomposite coating of paper for packaging
  19. Printing
  20. Improving the lightfastness of paperboard prints with pearlescent pigments
  21. Packaging
  22. Preparation of environmentally friendly hydrophobic paper by coating method
  23. Recycling
  24. Hybrid solar drying of sludge from kraft pulp mills
  25. Chemical Technology/Modifications
  26. Effect of pre-hydrolysis on the dissolution of hardwood pulp in double salt ionic liquid
  27. Lignin
  28. Comparison of three different industrial lignin-based porous carbon electrodes for electrochemical applications
  29. UV–vis spectroscopy as a rapid method for evaluation of total phenolic hydroxyl structures in lignin
  30. Miscellaneous
  31. Paper fingerprint by forming fabric: analysis of periodic marks with 2D lab formation sensor and machine learning for forensic paper-identification
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