多相材料の濡れ挙動による評価  [in Japanese] A Trial for Evaluating Wetting Behavior of Multiphase Materials  [in Japanese]

The wetting of water on two-phased model material plates, consisting of hydrophilic and hydrophobic phases, has been studied with an emphasis on the effect of relative phase area and phase configuration. The model material plates were prepared from aluminum sheets by arranging the two phases in check and stripe patterns with different pattern unit sizes. The wetting behavior was found to be best characterized by the advancing contact angle and capillary rise. It is shown also that the wetting behavior depends both on the phase fraction and phase pattern. In some cases, pulse type wetting was observed depending on model plate pattern and immersion rate. Dynamic analysis rather than static analysis has been more useful in evaluating the wetting behavior of multiphase materials.