文献类型：期刊文献

英文题名：Orthotropic wetting dynamics of wood: trade-off between surface spreading and penetration

作者：Chen, Kaiwen[1] Sun, Fengze[1] Liu, Zhiting[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 100091, Peoples R China

年份：2022

卷号：80

期号：3

起止页码：669-679

外文期刊名：EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS

收录：;EI(收录号：20220511545506);Scopus(收录号：2-s2.0-85123471620);WOS:【SCI-EXPANDED(收录号:WOS:000745554600001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 31971591, 32171705) and the Advanced analysis and testing center of Nanjing Forestry University.

语种：英文

外文关键词：Contact angle - Economic and social effects - Wood

摘要：Wetting is an important and effective factor to evaluate the gluing and painting performance of wood and its products. In this study, the dynamic wetting behaviors of four coniferous wood species (Chinese fir, radiata pine, Masson pine and Jack pine) were tested. All the samples were extracted prior to the wetting test to eliminate the influence of surface extractives. The sessile drop method was used, and distilled water was selected as the testing liquid. Time-dependent wettability, including changes in contact angle (CA) and liquid penetration volume, was evaluated on different planes (transverse, radial and tangential). The wettability showed obvious directional characteristics. In the transverse plane, water spread significantly fast, with no equilibrium CA observed. In the radial and tangential planes, CA reached equilibrium after 120 s of wetting, while penetration still occurred. The whole wetting process was divided into three stages, as the penetration rate exhibited a "slow-fast-slow" trend. The variation in penetration among the radial and tangential planes showed species dependency, and the influences of anatomical factors were simulated. It was concluded that surface spreading and penetration remained in a trade-off balance. Overall, the results of this study showed the orthotropic wetting characteristics of extracted wood and revealed the dynamics of spreading and penetration. These findings may also be helpful for explaining wood-water interactions.