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<p>Lignin-like materials share chemical similarities with wood and exhibit excellent mechanical properties along with resistance to aging and microbial degradation. This study focuses on eugenol as a target lignin-like monomer. Three eugenol nanoemulsions with concentrations of 10%, 20%, and 30% were prepared using surfactant Pesticide Emulsifier 1602 and co-surfactant diethylene glycol mono butyl ether (DEGBE). Laccase facilitated the in-situ polymerization of eugenol on the cell walls of waterlogged archeological wood (WAW) from the Nanhai No.1 shipwreck at temperatures of 35 °C °C, 45 °C, and 55 °C for dehydration and consolidation purposes. The 30 wt% eugenol emulsion at 45 °C showed the best consolidation effectiveness, with a minimal shrinkage rate of 3.62% and a 400–1000% increase in bending strength compared to controls. The polymer reinforced the decayed wood while preserving cellular lumens, offering an innovative, environmentally sustainable conservation method for WAW.</p>

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Dehydration and in situ consolidation of waterlogged archeological wood via laccase catalyzing eugenol nanoemulsion

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月14日

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  • Mengruo Wu,
  • Lingjuan Guo,
  • Jiake Chen,
  • Xiangna Han,
  • Jiajun Wang,
  • Zhiguo Zhang,
  • Hong Guo

摘要

Lignin-like materials share chemical similarities with wood and exhibit excellent mechanical properties along with resistance to aging and microbial degradation. This study focuses on eugenol as a target lignin-like monomer. Three eugenol nanoemulsions with concentrations of 10%, 20%, and 30% were prepared using surfactant Pesticide Emulsifier 1602 and co-surfactant diethylene glycol mono butyl ether (DEGBE). Laccase facilitated the in-situ polymerization of eugenol on the cell walls of waterlogged archeological wood (WAW) from the Nanhai No.1 shipwreck at temperatures of 35 °C °C, 45 °C, and 55 °C for dehydration and consolidation purposes. The 30 wt% eugenol emulsion at 45 °C showed the best consolidation effectiveness, with a minimal shrinkage rate of 3.62% and a 400–1000% increase in bending strength compared to controls. The polymer reinforced the decayed wood while preserving cellular lumens, offering an innovative, environmentally sustainable conservation method for WAW.