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<p>Micro- and/or nanoscale lignocellulose-based fibrils represent an environmentally sustainable alternative to petroleum-derived materials. Thus, this study proposes a new approach for efficiently producing fibrils from lignin-rich organosolv pulp. Subsequently, this study aimed to evaluate the effects of pulp slurry concentration and kneading time parameters on fiber fibrillation and micronization. The fibrils produced under each operating parameter were characterized using image analysis, fiber size analysis, freeness, water retention value (WRV), and strength properties. Higher pulp concentrations and longer kneading times resulted in significant reductions in fiber length and width, and a pronounced increase in fine content. Freeness consistently decreased with increasing fibrillation, whereas the WRV increased accordingly. Furthermore, films fabricated from the 10 wt% 3&#xa0;h-kneaded fiber, which exhibited the highest degree of fibrillation, showed the greatest increases in density and tensile index. These findings suggest that alkali kneading could be a potential precursor process for lignin-rich microfibrillated cellulose and cellulose nanofibrils.</p>

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Effects of kneading operating parameters on the fibrillation of organosolv pulp

  • 期刊论文

  • 发表日期：

    2026年6月19日

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  • Sa Rang Choi,
  • Jung Myoung Lee

摘要

Micro- and/or nanoscale lignocellulose-based fibrils represent an environmentally sustainable alternative to petroleum-derived materials. Thus, this study proposes a new approach for efficiently producing fibrils from lignin-rich organosolv pulp. Subsequently, this study aimed to evaluate the effects of pulp slurry concentration and kneading time parameters on fiber fibrillation and micronization. The fibrils produced under each operating parameter were characterized using image analysis, fiber size analysis, freeness, water retention value (WRV), and strength properties. Higher pulp concentrations and longer kneading times resulted in significant reductions in fiber length and width, and a pronounced increase in fine content. Freeness consistently decreased with increasing fibrillation, whereas the WRV increased accordingly. Furthermore, films fabricated from the 10 wt% 3 h-kneaded fiber, which exhibited the highest degree of fibrillation, showed the greatest increases in density and tensile index. These findings suggest that alkali kneading could be a potential precursor process for lignin-rich microfibrillated cellulose and cellulose nanofibrils.