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<p>This study compares the structural, optical, and mechanical characteristics of chitin nanopapers fabricated through mechanical fibrillation and TEMPO-mediated oxidation. The TEMPO-oxidized nanopaper exhibited higher optical transparency (approximately 92%) than the mechanically fibrillated sample (around 60%), primarily due to enhanced nanofiber dispersion and smaller fibril diameters. In contrast, the mechanically produced nanopaper showed greater crystallinity (above 90%) and stronger hydrogen bonding, resulting in higher tensile strength and Young’s modulus compared with the oxidized counterpart. Microscopic analyses confirmed the more homogeneous and well-dispersed network in TEMPO-treated samples, while spectroscopic results indicated the presence of carboxylate groups introduced by oxidation. The research overall highlights the usability of both nanopaper types in different applications and how TEMPO-oxidized nanopaper fits best under transparent and biodegradable packaging and mechanically treated nanopaper in applications requiring more strength.</p>

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Comparison of the properties of nanopaper from chitin nanofibers prepared by mechanical and TEMPO-oxidized methods

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月17日

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  • Alireza Mohammadlou,
  • Mohammadreza Dehghani Firouzabadi,
  • Hossein Yousefi

摘要

This study compares the structural, optical, and mechanical characteristics of chitin nanopapers fabricated through mechanical fibrillation and TEMPO-mediated oxidation. The TEMPO-oxidized nanopaper exhibited higher optical transparency (approximately 92%) than the mechanically fibrillated sample (around 60%), primarily due to enhanced nanofiber dispersion and smaller fibril diameters. In contrast, the mechanically produced nanopaper showed greater crystallinity (above 90%) and stronger hydrogen bonding, resulting in higher tensile strength and Young’s modulus compared with the oxidized counterpart. Microscopic analyses confirmed the more homogeneous and well-dispersed network in TEMPO-treated samples, while spectroscopic results indicated the presence of carboxylate groups introduced by oxidation. The research overall highlights the usability of both nanopaper types in different applications and how TEMPO-oxidized nanopaper fits best under transparent and biodegradable packaging and mechanically treated nanopaper in applications requiring more strength.