Research Progress of Surface Free Energy′s Computing Methods and the Influence on the Properties of Material Surface

Surface free energy is a represent of the materials′energy states,for the properties of materials there is a great influence.The ways of calculation for the surface free energy include Fowkesequation,Owens-Wendt-Kaelbleequation,van Oss equation and Wu equation.Each method has its features and forms.At present,the evaluated methods of the surface free energy are based on the Young equation.The contact angleθis an important physical quantity.For the contact angleθ,there are also many ways to measure.For example,it can be evaluated by anglemeasurement method,height-measurement method or force-measurement method.Started with the aspect of calculation methods,the effects of surface free energy on the materials′adhesive strength,wetting character and other properties are summarized systematically,and the research progress of surface free energy of material is summarized.Finally,the research direction of surface free energy is put forward.