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<p>Bamboo scrimber, as a sustainable engineered composite material, faces challenges in interfacial adhesion and mildew resistance due to the hydrophobic surface of bamboo bark/inner skin and its nutrient-rich composition (e.g., starch and other saccharides). Atmospheric plasma, through high-energy particles, can activate the bamboo surface by grafting oxygen-containing functional groups and inducing micro-roughness. This study proposes a novel strategy combining atmospheric plasma treatment with in situ zinc oxide nanoparticle deposition to simultaneously enhance interfacial bonding and anti-mold performance. The plasma-driven pyrolysis of zinc acetate precursor generates zinc oxide nanoparticles in situ, imparting mildew resistance to the material. Concurrently, this modification promotes deep penetration and uniform spreading of phenolic resin, forming a continuous bonding layer and mechanically interlocked "glue nail" structure at the bamboo-resin interface. The optimized composite exhibited a 13.7% increase in modulus of rupture (MOR), a 24.9% increase in modulus of elasticity (MOE), and a 107% increase in surface free energy. The inhibition rates against <i>Aspergillus niger</i> and <i>Penicillium purpurogenum</i> exceeded 90%, while the inhibition rate against <i>Trichoderma viride</i> reached 75%. This green and efficient one-step approach fully utilizes bamboo bark, significantly improving interfacial strength and mildew resistance, offering new insights for the interface engineering of natural fiber composites.</p>

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Interface-enhanced bamboo composites via atmospheric plasma synergized with in situ ZnO nanoparticles for multifunctional applications

  • 期刊论文

  • 发表日期：

    2026年1月14日

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  • Yuhan Mo,
  • Guolong Hong,
  • Linbi Chen,
  • Fangbing Yu,
  • Mingen Fei,
  • Huiping Lin,
  • Ying Chen,
  • Ran Li,
  • Wenbin Yang

摘要

Bamboo scrimber, as a sustainable engineered composite material, faces challenges in interfacial adhesion and mildew resistance due to the hydrophobic surface of bamboo bark/inner skin and its nutrient-rich composition (e.g., starch and other saccharides). Atmospheric plasma, through high-energy particles, can activate the bamboo surface by grafting oxygen-containing functional groups and inducing micro-roughness. This study proposes a novel strategy combining atmospheric plasma treatment with in situ zinc oxide nanoparticle deposition to simultaneously enhance interfacial bonding and anti-mold performance. The plasma-driven pyrolysis of zinc acetate precursor generates zinc oxide nanoparticles in situ, imparting mildew resistance to the material. Concurrently, this modification promotes deep penetration and uniform spreading of phenolic resin, forming a continuous bonding layer and mechanically interlocked "glue nail" structure at the bamboo-resin interface. The optimized composite exhibited a 13.7% increase in modulus of rupture (MOR), a 24.9% increase in modulus of elasticity (MOE), and a 107% increase in surface free energy. The inhibition rates against Aspergillus niger and Penicillium purpurogenum exceeded 90%, while the inhibition rate against Trichoderma viride reached 75%. This green and efficient one-step approach fully utilizes bamboo bark, significantly improving interfacial strength and mildew resistance, offering new insights for the interface engineering of natural fiber composites.