森林工程2025，Vol.41Issue(4)：713-722,10.DOI:10.7525/j.issn.1006-8023.2025.04.006
二氧化硅包裹锐钛矿型二氧化钛处理木材的老化性能研究
Study on the Aging Properties of Silica-Coated Anatase-Type Titanium Dioxide-Treated Wood
摘要
Abstract
To enhance the weathering resistance of wood,anatase titanium dioxide was encapsulated with silica to form silica-coated anatase-type titanium dioxide(A-TiO2@SiO2),which was then modified with a silane coupling agent to pro-duce the modifier(KH560-TiO2@SiO2).KH560 referred to γ-glycidoxypropyltrimethoxysilane.Fast-growing poplar wood was treated with this modifier via vacuum impregnation,and the effects of KH560-TiO2@SiO2 on the ultraviolet re-sistance of poplar wood were systematically evaluated.The results indicated that Ti and Si elements were introduced into the surface of the modified wood,with a significant amount of particulate matter being loaded.The treated wood exhib-ited a higher contact angle compared to the untreated wood,which helped to reduce the degradation caused by water in outdoor applications.The ability of the modified wood to excite hydroxyl radicals,superoxide anions,and phenoxyl radi-cals was reduced,while its absorbance in the UV region increased.Untreated poplar wood experienced rapid lignin deg-radation after UV aging,leading to photodegradation and structural deterioration.The photocatalytic properties of ana-tase titanium dioxide(A-TiO2)promoted the degradation of cellulose in poplar wood.However,the KH560-TiO2@SiO2 modification delayed lignin degradation while maintaining the stability of cellulose.In summary,the encapsulation treat-ment reduced the photocatalytic activity of A-TiO2,and the modifier acted as a UV shield while decreasing the wettability of the wood,thereby enhancing the weathering resistance of poplar wood.Fast-growing poplar wood treated with KH560-TiO2@SiO2 has the potential for outdoor applications.关键词
速生杨木/抗老化/二氧化钛/表面修饰/木材改性/紫外屏蔽/光降解/自由基Key words
Fast-growing poplar/weathering/titanium dioxide/surface modification/wood modification/ultraviolet shielding/photodegradation/free radical分类
农业科技引用本文复制引用
尤梓媛,于洋,贺增成,肖泽芳,张天鹏,谢延军,邱哲..二氧化硅包裹锐钛矿型二氧化钛处理木材的老化性能研究[J].森林工程,2025,41(4):713-722,10.基金项目
国家自然科学基金区域创新发展联合基金(U24A20428) （U24A20428）
国家自然科学基金青年科学基金项目(32401502). （32401502）
