Chibowski Emil
Department of Physical Chemistry, Interfacial Phenomena, Faculty of Chemistry, Maria Curie, Sklodowska University, 20-031 Lublin, Poland.
Adv Colloid Interface Sci. 2007 May 31;133(1):51-9. doi: 10.1016/j.cis.2007.03.002. Epub 2007 Mar 16.
Problems of experimental determination and theoretical verification of equilibrium contact angles are discussed basing on the literature data. A relationship between the advancing and receding contact angles versus the equilibrium contact angle is described and then verified using the literature contact angles determined on paraffin wax and polypropylene. Using the proposed relationship and experimentally determined equilibrium contact angles, obtained by plotting the advancing and receding contact angles versus the contact angle hysteresis or by applying vibration of the system liquid drop/solid surface, it is found that the same value of the surface free energy for paraffin wax is calculated from the contact angles of water and ethylene glycol. However, in the case of polypropylene some inconsistency appears between the equilibrium contact angles of the probe liquid used and the calculated surface free energy. More experimental data of the equilibrium contact angle are needed to verify further the relationship.
基于文献数据，讨论了平衡接触角的实验测定和理论验证问题。描述了前进接触角和后退接触角与平衡接触角之间的关系，然后使用在石蜡和聚丙烯上测定的文献接触角进行验证。利用所提出的关系以及通过绘制前进接触角和后退接触角与接触角滞后的关系或通过施加系统液滴/固体表面振动而实验测定的平衡接触角，发现从水和乙二醇的接触角计算出的石蜡表面自由能值相同。然而，在聚丙烯的情况下，所用探针液体的平衡接触角与计算出的表面自由能之间出现了一些不一致。需要更多平衡接触角的实验数据来进一步验证该关系。
