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<p>Inherent hydrophilicity of wood usually induces water-related problems and impacts wood sustainable application. This study proposed to transform hydrophilic wood into superhydrophobic materials by introducing biomass-derived furfuryl alcohol (FA) prepolymer and self-made polymerized FA nanoparticles (PFAnps) through simple surface spray. The modified poplar wood (<i>Populus euramericana</i> Cv.) (PFA-PFAnps wood) showed excellent superhydrophobicity and the contact angle (CA) and dynamic rolling angle reached 161.8° and 3.4°. The CA kept over 161° even after 120&#xa0;s, indicated the time stability of fabricated superhydrophobic wood. Besides, PFA-PFAnps wood exhibited durable superhydrophobicity and remarkable resistance to mechanical abrasion, tape peeling, knife scratching and high temperature. The mechanisms were revealed with SEM, optical profilometer and FTIR analysis: ①in-situ polymerized furfural resin and PFAnps formed dense robust coatings, which covered many cells, voids and sorption sites, protecting wood from external influence; ②hydrophobic furfural resin polymerization fixed PFAnps on wood surface and protected the micro-nano rough structure. Besides, PFA-PFAnps wood presented self-healing superhydrophobicity because the constructed coating simulating natural lotus leaves owned uniform micro-nano structures and composition from inside out. When the surface layer was destroyed, the new exposed surface after brief sanding had similar structures and composition and superhydrophobicity. PFA-PFAnps wood displayed remarkable self-cleaning property, and improved dimensional stability suggested by 27% reduction of volume change mainly due to combined effects of water path blocking, sorption site coverage and cell wall bulking. The new fabrication approach and mechanism analysis may provide references for upgrading low-quality wood and preparing superhydrophobic materials for wide and sustainable application against water attack.</p>

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Preparation and mechanism analysis of self-healing superhydrophobic wood with high durability, dimensional stability and self-cleaning property

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • Tiantian Yang,
  • Lingcheng Wang,
  • Dan Luo,
  • Ao Shen,
  • Changtong Mei

摘要

Inherent hydrophilicity of wood usually induces water-related problems and impacts wood sustainable application. This study proposed to transform hydrophilic wood into superhydrophobic materials by introducing biomass-derived furfuryl alcohol (FA) prepolymer and self-made polymerized FA nanoparticles (PFAnps) through simple surface spray. The modified poplar wood (Populus euramericana Cv.) (PFA-PFAnps wood) showed excellent superhydrophobicity and the contact angle (CA) and dynamic rolling angle reached 161.8° and 3.4°. The CA kept over 161° even after 120 s, indicated the time stability of fabricated superhydrophobic wood. Besides, PFA-PFAnps wood exhibited durable superhydrophobicity and remarkable resistance to mechanical abrasion, tape peeling, knife scratching and high temperature. The mechanisms were revealed with SEM, optical profilometer and FTIR analysis: ①in-situ polymerized furfural resin and PFAnps formed dense robust coatings, which covered many cells, voids and sorption sites, protecting wood from external influence; ②hydrophobic furfural resin polymerization fixed PFAnps on wood surface and protected the micro-nano rough structure. Besides, PFA-PFAnps wood presented self-healing superhydrophobicity because the constructed coating simulating natural lotus leaves owned uniform micro-nano structures and composition from inside out. When the surface layer was destroyed, the new exposed surface after brief sanding had similar structures and composition and superhydrophobicity. PFA-PFAnps wood displayed remarkable self-cleaning property, and improved dimensional stability suggested by 27% reduction of volume change mainly due to combined effects of water path blocking, sorption site coverage and cell wall bulking. The new fabrication approach and mechanism analysis may provide references for upgrading low-quality wood and preparing superhydrophobic materials for wide and sustainable application against water attack.