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ACS Applied Materials & Interfaces

ACS Applied Materials & Interfaces

IF: 8.3
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Endowing Three-Dimensional Porous Wood with Hydrophobicity/Superhydrophobicity Based on Binary Silanization.

Published:21 August 2024 DOI: 10.1021/acsami.4c09951 PMID: 39120144
Wei Tang,?Hengyi Zhang,?Dennis W Hess,?Chunmei Xie,?Jing Liu,?Xijuan Chai,?Kaimeng Xu,?Lianpeng Zhang,?Hui Wan,?Linkun Xie

Abstract

Wood, as a natural biomass material, has long been a research focus. Superhydrophobic modified wood, in particular, has shown great promise in a myriad of engineering applications such as architecture, landscape, and shipbuilding. However, commercial development has encountered significant resistance due to preparation difficulties and sometimes unsatisfactory performance. In this study, hydrophobic/superhydrophobic wood comodified with methyltrimethoxysilane (MTMS) and 1H,1H,2H,2H-perfluorodecyltrimethoxysilane (PFDTMS) was fabricated by a one-step sol-gel method that uses an in situ growth process. Low-molecular-weight MTMS was allowed to permeate the three-dimensional porous wood interior. Then, acid-base catalysts were used to regulate the hydrolytic condensation process of MTMS and PFDTMS composite silanes to generate micro/nano hierarchical structures with low surface energy on the wood surface. The physicochemical characteristics of modified wood were investigated and the reaction mechanism established. The modified wood displayed excellent internal hydrophobicity/surface superhydrophobicity, water-moisture resistance, and dimensional stability at low fluorine concentrations. The resulting superhydrophobic surface provided stain resistance, self-cleaning ability, and loading capacity in water while exhibiting good mechanochemical stability; wood mechanical strength was also enhanced. This methodology created a superhydrophobic surface and bulk hydrophobization of wood in one step. Beyond wood, this approach is expected to provide a promising approach for functional modification of other porous composite materials.

Substances (2)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Methyltrimethoxysilane 1185-55-3 C4H12O3Si 525 suppliers $6.00-$450.00
1H,1H,2H,2H-Perfluorodecyltrimethoxysilane 83048-65-1 C13H13F17O3Si 318 suppliers $7.00-$777.00

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