文献类型：期刊文献

英文题名：Influence of electrochemically deposited TiO2 on the anti-weathering properties of heat-treated wood

作者：Chen, Kaiwen[1] Tan, Yujing[1] Sun, Fengze[1] Zhu, Jianyi[1] Peng, Hui[1,2] Jiang, Jiali[3] Lyu, Jianxiong[1,2,3] Zhan, Tianyi[1,2]

第一作者：Chen, Kaiwen

通信作者：Zhan, TY[1];Zhan, TY[2]

机构：[1]Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China;[3]Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China

年份：0

外文期刊名：WOOD MATERIAL SCIENCE & ENGINEERING

收录：;EI(收录号：20222012128545);Scopus(收录号：2-s2.0-85132646131);WOS:【SCI-EXPANDED(收录号:WOS:000792025700001)】；

基金：This work was financially supported by the National Natural Science Foundation of China [No. 31971591, 32171705].

语种：英文

外文关键词：Heat-treated wood; electrochemical deposition; titanium dioxide (TiO2); artificial weathering; natural weathering; color change

摘要：Ultraviolet light-induced discoloration is a noticeable issue when heat-treated wood is used outdoors. In this study, titanium dioxide (TiO2) particles were electrochemically deposited on the surface of heat-treated wood via a high-voltage electrostatic field (HVEF). Natural and artificial weathering tests were carried out to evaluate the anti-weathering properties after the electrochemical deposition. During HVEF treatment, Ti particles were triggered in the form of Ti4+. Ti4+ grafted with the hydroxyl groups of hemicellulose and lignin in the form of Ti-OH, and TiO2 was produced due to the oxidizing atmosphere generated by HVEF. TiO2 and Ti-OH played roles as UV absorbers, reducing degradation and discoloration of heat-treated wood. The photodegradation of lignin was alleviated effectively during both the artificial and natural weathering. The stability of wood color was remained. After the artificial weathering, the values of L*, a* and b* of the electrochemical depositied sample were 55, 10 and 25, respectively. The leaching amount of TiO2 after artificial or natural weathering was less than 6% or 40%, respectively determined by atomic absorption spectroscopy. The results suggest the feasibility of the electrochemical deposition of TiO2 for improving the anti-weathering properties of heat-treated wood and provide an effective strategy for industrial wood modification.