本工作利用测定几种参照液体在明胶凝胶上的接触角,定量地估算了明胶凝胶的表面自由能。加入表面活性剂,尤其是非离子表面活性剂,能增加明胶凝胶的表面自由能(主要是其极性分量)并大大改善明胶凝胶的表面润湿性。在表面上分子的吸附与定向和明胶凝胶中非极性网状结构形成的基础上,解释了上述实验结果。 In this work, the contact angle of several reference liquids on gelatin gel was measured to quantitatively estimate the surface free energy of gelatin gel. The addition of surfactants, especially nonionic surfactants, increases the surface free energy (mainly its polar component) of the gelatin gel and greatly improves the surface wettability of the gelatin gel. Based on the adsorption and orientation of the molecules on the surface and the formation of non-polar network structures in the gelatin gel, the above experimental results are explained.