Effect of Temperature on the Surface Free Energy and Its Polar Component of Poplar Wood-flour
The contact angles of three probe liquids on the surface of poplar wood treated at different temperatures were tested by capillary rise method. Based on Washburn equation and the method suggested by Owens-wendt-Kaelble, the surface free energy and the corresponding polar and dispersive components were calculated. The results demonstrated that the contact angles of distilled water on poplar wood-flour treated at elevated temperatures increased and that of formamide decreased, the surface free energy and the corresponding dispersive component of the poplar wood-flour were 23.43mN/m and 4.64 mN/m respectively. When the heat treatment time was 2h, as the elevated treated temperature, the surface free energy of wood-flour decreased, its dispersive component increased, and its polar component decreased. The reasons for these results were discussed as well in this paper.
surface contact angles surface free energy poplar
Chao-qun MEI Yong-ming FAN Guan-qun LUO Hong-li ZHANG Ya-li LI
College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China Department of Forest Products, University of Idaho, Moscow, USA Department of Chemistry & Chemical Engineering, Weinan Nomal University, Weinan Shaanxi 714000,China
国际会议
南京
英文
73-79
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）