Journal
JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
Volume 42, Issue 6, Pages 409-418Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/02773813.2022.2114498
Keywords
Alkyltrichlorosilane; nano-roughness structure; superhydrophobic wood; wettability
Categories
Funding
- Joint Special Project of Agricultural Basic Research of Yunnan Province [202101BD070001-011]
- Project of National College Students' Innovation and Entrepreneurship Training Program [202110677009]
- National Natural Science Foundation of China
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The study investigated the modification of Pinus kesiya wood using four different alkyltrichlorosilanes, with the best results achieved when a 0.25% volume ratio of MTCS and OTCS solutions was used, resulting in the highest water contact angle and lowest water uptake.
To explore the typical alkyltrichlorosilane and optimal volume ratio of the alkyltrichlorosilane-toluene solutions for preparing superhydrophobic Pinus kesiya wood, four alkyltrichlorosilanes: methyltrichlorosilane (MTCS), butyltrichlorosilane (BTCS), dodecyltrichlorosilane (DTCS), and octadecyltrichlorosilane (OTCS) were each used to modify the wood samples at different volume ratios of alkyltrichlorosilane-toluene solutions. The Pinus kesiya wood specimens were immersed in the solutions to fabricate superhydrophobic coatings on the wood surface. The wettability of the modified wood surfaces was characterized by water contact angle and water uptake values. The chemical composition of the wood samples was analyzed using X-ray photoelectron spectroscopy (XPS) and attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), and the surface morphology of the modified wood samples was observed using scanning electron microscopy (SEM). The result showed that all types of alkyltrichlorosilane-modified wood changed from hydrophilic to hydrophobic. The wood specimens had the highest water contact angle of 151.8 +/- 0.4 degrees and lowest water uptake of 18 +/- 0.6 wt.% when 0.25 vol.% MTCS and 0.25 vol.% OTCS solutions were applied, respectively.
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