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<p>It is of great value to reuse dissolved carbohydrates from the spent liquor produced in the acid hydrolysis process of cellulose nanocrystals (CNCs). In the present study, the special flake-like nanocellulose crystals (FCNCs) were self-assembled from the dissolved cellulose chains or small-sized cellulose fragments via a “bottom-up” approach. Despite the low yield (~ 0.44%), the obtained FCNCs in the experiment had a uniform morphology. The average diameter of FCNCs was 712&#xa0;nm, with thickness in the range of 3–3.5&#xa0;nm. They exhibited superior thermal stability relative to the received CNCs. XRD characterization revealed that the FCNCs with the cellulose type II structure possessed the hydrophobic (110) plane as the exposed surface, which endowed the material with relatively hydrophobic property. Confirmed by the contact angle tests, the water contact angle value of FCNC film was as high as 72.0°, almost 30° higher than that of the CNC film.</p>

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Preparing flake-like nanocelluloses from the spent liquor of cellulose nanocrystals

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Jiebai Li,
  • Dongyan Liu,
  • Xilin Jia,
  • Guangguang Guan,
  • Wenbo Zhang,
  • Jingyuan Wei,
  • Yangtao Zhou

摘要

It is of great value to reuse dissolved carbohydrates from the spent liquor produced in the acid hydrolysis process of cellulose nanocrystals (CNCs). In the present study, the special flake-like nanocellulose crystals (FCNCs) were self-assembled from the dissolved cellulose chains or small-sized cellulose fragments via a “bottom-up” approach. Despite the low yield (~ 0.44%), the obtained FCNCs in the experiment had a uniform morphology. The average diameter of FCNCs was 712 nm, with thickness in the range of 3–3.5 nm. They exhibited superior thermal stability relative to the received CNCs. XRD characterization revealed that the FCNCs with the cellulose type II structure possessed the hydrophobic (110) plane as the exposed surface, which endowed the material with relatively hydrophobic property. Confirmed by the contact angle tests, the water contact angle value of FCNC film was as high as 72.0°, almost 30° higher than that of the CNC film.