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European Journal of Wood and Wood Products

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05-01-2023 | Original Article

Weathering properties of wood treated with 3-isocyanatopropyltriethoxysilane-TiO₂

Authors: Danchen Shi, Wenxuan Wang, Daxin Liang, Zengcheng He, Yonggui Wang, Zefang Xiao, Yang Yu, Haigang Wang, Yanjun Xie

Published in: European Journal of Wood and Wood Products | Issue 4/2023

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Abstract

Plantation poplar is one of the most commonly used fast-growing woods in China. However, it is susceptible to weathering due to climatic conditions such as sunlight irradiation, rain, temperature changes, and oxidation. Ultraviolet (UV)-induced discoloration is a noticeable problem of this wood during its outdoor use. In this study, titanium dioxide (TiO₂) nanoparticles were deposited onto a wood surface via a bridge of 3-isocyanatopropyltriethoxysilane (IPTS). Accelerated weathering tests were conducted by exposing wood veneers to UV, water spraying, and condensation for 336 h to evaluate the treatment effect on their anti-weathering properties. During treatment, TiO₂ nanoparticles were bonded with IPTS and grafted onto the wood surface via the isocyanate group. The nanoparticles functioned as a UV filter and reduced photodegradation, while IPTS helped prevent the wood from collapsing. Fourier transform infrared spectroscopy showed that the photodegradation of lignin during weathering was effectively inhibited after treatment. After artificial weathering for 192 h, the color difference (ΔE) of both untreated and IPTS-treated woods increased up to 40 while that of IPTS-TiO₂-treated wood increased only to 12. The results suggest that IPTS-TiO₂ modification is feasible for improving the anti-weathering properties of poplar wood and may provide an effective strategy for industrial wood modification.

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Title: Weathering properties of wood treated with 3-isocyanatopropyltriethoxysilane-TiO2
Authors: Danchen Shi
Wenxuan Wang
Daxin Liang
Zengcheng He
Yonggui Wang
Zefang Xiao
Yang Yu
Haigang Wang
Yanjun Xie
Publication date: 05-01-2023
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Wood and Wood Products / Issue 4/2023
Print ISSN: 0018-3768
Electronic ISSN: 1436-736X
DOI: https://doi.org/10.1007/s00107-022-01921-4

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