明胶凝胶表面润湿性的研究

A STUDY ON THE WETTABILITY OF GELATIN HYDROGELS

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。

The surface of gelatin hydrogels behaves as a strongly hydrophobic and low-energy surface.The Surface free energy of gelatin hydrogels was estimated by measuring the contact angle of some reference liquids on the gelatin hydrogels.The surfactants,especially the nonionic surfactants,dissolved in the hydrogels,increases the surface free energy and improves pronouncedly the wettability of gelatiin hydrogels.The results are interpreted in terms of adsorption and orientation of molecules on the surface,as well as by the existence of the non-polar network in gelatin hydrogels.