Xylan assisted construction of highly hydrophobic wood surface

作者：Huang, Tenghua; Zou, Yongsheng; Gao, Wenhua; Tan, Zhangqiang; Shen, Wenhui^*; Wei, Penglian^*

来源：PROGRESS IN ORGANIC COATINGS, 2023, 174: 107328.

DOI：10.1016/j.porgcoat.2022.107328

• Hemicelluloses
• Xylan
• Dispersion
• SiO2 nanoparticles
• Hydrophobic wood surface

Forming a nano-structured rough surface and incorporating synthetic low surface energy polymers is one of the major methods to construct a highly hydrophobic wood surface. However, most of the synthetic polymers are petroleum-based chemicals, which are toxic, non-biodegradable and lack the ability to well disperse the nano -particles to construct an excellent nano-structured rough surface. In this study, xylans were modified by ester-ification reaction between dodecenyl succinic anhydride (DDSA) and the hydroxyls on xylans under alkaline condition. The DDSA modified xylans were used as a dispersant and an anchoring agent to uniformly disperse SiO2 nanoparticles and bind them on wood surface to construct a rough nano-structure. The DDSA modified xylans also demonstrated high hydrophobicity and low surface energy. The coating with SiO2 nanoparticle/ DDSA modified xylan dispersions with an air-drying strategy has successfully led to a highly hydrophobic wood surface with a contact angle up to 131 degrees. This study suggests the potential applications of xylans in the con-struction of highly hydrophobic wood surface for wood protection.

• 单位
  广西大学