文献类型：期刊文献

英文题名：Relationship between structural damage and performance failure of wood-based electrothermal composites with extreme aging treatment

作者：Tian, Dongxue[1] Wang, Jiale[1] Tao, Xin[1] Zhang, Longfei[1] Jiang, Peng[1] Lyu, Shaoyi[1] Liang, Shanqing[1]

第一作者：Tian, Dongxue

通信作者：Liang, SQ[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2025

卷号：59

期号：4

外文期刊名：WOOD SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20252718701561);Scopus(收录号：2-s2.0-105009367195);WOS:【SCI-EXPANDED(收录号:WOS:001518518300001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Nos. 32471800, 32071705).

语种：英文

外文关键词：Accelerated aging - Adhesives - Carbon fibers - Carbonization - Color - Electric heating - Electric losses - High temperature effects - Wood

摘要：Wood-based electrothermal composites (WBECs) are increasingly employed in household building materials. However, their practical effectiveness can be significantly impacted by cooling and heating cycles and high-temperature-and-humidity environments. Therefore, we investigated the effects of electrothermal and hygrothermal aging on colorimetric parameters, resistance variations, and electrothermal properties. The results indicated that the surface color of WBECs gradually shifted toward red and yellow with increasing electrothermal power density and the application of hygrothermal treatment. Similarly, the brightness and gloss value decreased, with the maximum gloss loss rate reaching 45.42%. The resistance of the WBECs increased during the aging process from 76.1 ohm in the control sample (in CS) to 147.27 ohm in the sample subjected to hygrothermal aging after electrothermal treatment at 2000 W/m2 for 700 h (in EH2-3), corresponding to an increase rate of 93.52%. Owing to the aging of the internal carbon fiber conductive network and damage to the adhesive interface, the WBECs became more sensitive to temperature and hygroscopicity. Furthermore, the maximum surface temperature and electric-to-radiant power transfer efficiency of the WBECs considerably decreased from the control sample re-loading 1000 W/m2 (CS-1) to EH2-3, while the temperature nonuniformity increased from 2.71 degrees C in CS-1 to 17.90 degrees C in EH2-3. High-temperature carbonization further demonstrated that the influence of hygrothermal aging on the structure and properties of the WBECs was greater than that of electrothermal aging. These results provide technical support for the stable and safe heating of WBECs in complex application environments.