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<p>Lignin-containing microfibrillated cellulose (LMFC) has shown great potential for improving paper strength; however, its application under industrial conditions remains underexplored. This study investigates the effect of mechanically produced LMFC on paper properties in the presence of industrial white-water and examines how varying chitosan amounts can modify white-water properties to further improve these properties. The addition of 3% (w/w) LMFC increased tensile index by 15%, elongation at break by 17%, tear index by 3.8%, and internal bonding strength by 9%. These improvements were enhanced with the addition of chitosan to the white-water at varying amounts (22.5, 27.5 and 32.5&#xa0;mg/L), which increased the retention of LMFC, and other fine components present in the white-water. Additionally, chitosan enhanced the retention of colored compounds within the fiber matrix, a desirable outcome for packaging grades requiring specific color characteristics. These findings suggest that combining LMFC with chitosan-treated white-water can effectively enhance the mechanical properties of paper, making it suitable for industrial applications that demand high-strength performance, such as packaging.</p>

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Effect of chitosan-modified industrial white-water on the strength properties of paper containing microfibrillated cellulose

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Mohit Sharma,
  • Ana Teodora Silva,
  • Filipa Moura,
  • Luisa Durães,
  • Paulo J. T. Ferreira

摘要

Lignin-containing microfibrillated cellulose (LMFC) has shown great potential for improving paper strength; however, its application under industrial conditions remains underexplored. This study investigates the effect of mechanically produced LMFC on paper properties in the presence of industrial white-water and examines how varying chitosan amounts can modify white-water properties to further improve these properties. The addition of 3% (w/w) LMFC increased tensile index by 15%, elongation at break by 17%, tear index by 3.8%, and internal bonding strength by 9%. These improvements were enhanced with the addition of chitosan to the white-water at varying amounts (22.5, 27.5 and 32.5 mg/L), which increased the retention of LMFC, and other fine components present in the white-water. Additionally, chitosan enhanced the retention of colored compounds within the fiber matrix, a desirable outcome for packaging grades requiring specific color characteristics. These findings suggest that combining LMFC with chitosan-treated white-water can effectively enhance the mechanical properties of paper, making it suitable for industrial applications that demand high-strength performance, such as packaging.