Siebold A, Walliser A, Nardin M, Oppliger M, Schultz J
Institut de Chimie des Surfaces et Interfaces, CNRS, 15, rue Jean Starcky, Mulhouse Cedex, 68057, France
J Colloid Interface Sci. 1997 Feb 1;186(1):60-70. doi: 10.1006/jcis.1996.4640.
Surface properties in terms of surface free energy of solid particles were investigated using capillary rise experimental methods based on Washburn's equation. Two different approaches related to height and weight gain measurements were validated by silica flour and calcium carbonate surface studies. Dispersive components of the surface free energy and nondispersive components of solid-liquid energy of interaction were computed. Some differences observed are related to experimental data acquisitions. Many experimental difficulties, which led in the past to inaccurate wettability characteristics, have been controlled. A new link to the so-called geometrical factor of Washburn's equation has also been established after comparison of theoretical and experimental static and hydrodynamic radii. The high precision of the weight gain approach was achieved by strict control of experimental parameters such as temperature, powder packing, and sintered glass porosity.
采用基于沃什伯恩方程的毛细管上升实验方法，研究了固体颗粒表面自由能方面的表面性质。通过硅粉和碳酸钙表面研究验证了与高度和重量增加测量相关的两种不同方法。计算了表面自由能的色散分量和固液相互作用能的非色散分量。观察到的一些差异与实验数据采集有关。过去导致润湿性特征不准确的许多实验困难已得到控制。在比较理论和实验静态及流体动力学半径后，还建立了与沃什伯恩方程所谓几何因子的新联系。通过严格控制温度、粉末填充和烧结玻璃孔隙率等实验参数，实现了重量增加法的高精度。
