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<p>Developing wood bio-adhesives is critical because they are more sustainable and have no formaldehyde release. Rich cellulosic hydrochar-based-wood adhesives from bamboo powder were developed using NaIO<sub>4</sub> treatment hydrochar as a feedstock to address the poor water resistance of cellulose-based wood bio-adhesives and poor wet shear strength value. The highest wet shear strength of the bio-adhesives (BD-OBH-PEI) is 1.59&#xa0;MPa, which exceeds the requirement of the Chinese national standard GB/T 9846–2015 (≥ 0.7&#xa0;MPa). The Schiff base reaction is beneficial for the formation of macromolecular networks to increase the wet shear strength. When ammonium polyphosphate is added, the flame retardancy of the bio-adhesive was notably improved. The presence of active functional groups and the formation of covalent bonds are key factors in the preparation of bio-adhesives. This work paves a new path for the high-value utilization of lignocellulose.</p>

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Preparation of rich cellulosic hydrochar-based wood adhesives from bamboo powder

  • 期刊论文

  • 发表日期：

    2025年5月14日

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  • Han-Song Zhu,
  • Ze-Kai Tan,
  • Yong-Xing Chen,
  • Huan Yang,
  • Zhi-Xiang Xu,
  • Li-Jian Leng

摘要

Developing wood bio-adhesives is critical because they are more sustainable and have no formaldehyde release. Rich cellulosic hydrochar-based-wood adhesives from bamboo powder were developed using NaIO4 treatment hydrochar as a feedstock to address the poor water resistance of cellulose-based wood bio-adhesives and poor wet shear strength value. The highest wet shear strength of the bio-adhesives (BD-OBH-PEI) is 1.59 MPa, which exceeds the requirement of the Chinese national standard GB/T 9846–2015 (≥ 0.7 MPa). The Schiff base reaction is beneficial for the formation of macromolecular networks to increase the wet shear strength. When ammonium polyphosphate is added, the flame retardancy of the bio-adhesive was notably improved. The presence of active functional groups and the formation of covalent bonds are key factors in the preparation of bio-adhesives. This work paves a new path for the high-value utilization of lignocellulose.