EXPERIMENTAL RESEARCH ON THE FORCED WETTING DYNAMICS OF SURFACTANT SOLUTIONS BASED ON THE WILHELMY PLATE METHOD
The wettability of solutions can be enhanced by adding surfactants. However, research on the wetting properties of surfactant water solutions has mainly focused on spontaneous wetting processes with little forced wetting research. In this paper, the Wilhelmy plate method was used to study the forced wetting dynamics of surfactant solutions on both hydrophobic and hydrophilic solid substrates. The dynamic contact angles at different contact line velocities (θD～U relation) were measured using a KrussK100MK2 tensiometer. The influences of the macroscopic properties including surfactant solution concentration, substrate surface free energy and surface tension, on the θD～U relation were investigated to identify the major factors influencing the wetting dynamics. The microscopic effect of the surfactant adsorption on the solid-vapor interface near the contact line was also analyzed. The influence of the surfactant on the wetting properties was analyzed based on the experimental θD～U results for a 40％ volume fraction glycerol solution in water. A modified molecular-kinetic model describing the experimental θD～U relation agrees well with the experimental data.
Junyue Zhu Yuanyuan Duan Xiaodong Wang Qi Min
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua Universi Department of Thermal Engineering, School of Mechanical Engineering, University of Science & Technol
国际会议
The Ninth Asian Thermophysical Properties Conference(第九届亚洲热物理性能会议 ATPC 2010)
北京
英文
943-947
2010-10-19（万方平台首次上网日期，不代表论文的发表时间）