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    Xylan assisted construction of highly hydrophobic wood surface

    Year: 2023

    Journal: Progress in Organic Coatings, Volume 174, 2023-01-01, page 107328

    Authors: Huang, Tenghua; Zou, Yongsheng; Gao, Wenhua; Tan, Zhangqiang; Shen, Wenhui; Wei, Penglian

    Keywords: Dispersion; Hemicelluloses; Hydrophobic wood surface; SiO nanoparticles; Xylan

    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 nanoparticles to construct an excellent nano-structured rough surface. In this study, xylans were modified by esterification 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°. This study suggests the potential applications of xylans in the construction of highly hydrophobic wood surface for wood protection.
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