基于PP-B/EPDM热塑性硫化胶超疏水表面的构建与性能研究

Construction and Properties of Superhydrophobic Surfaces Based on PP-B/EPDM Thermoplastic Vulcanizate

用金相砂纸为模板,嵌段共聚聚丙烯/三元乙丙橡胶(并用比为50/50)热塑性硫化胶(TPV)为基体,构建模压TPV超疏水表面,并对其超疏水性进行研究。结果表明:模压TPV具有良好的超疏水性,疏水层厚度约为60μm;W5,W7和W10砂纸模压TPV表面与水的接触角大于150°且滚动角小于10°,符合超疏水表面要求;W10砂纸模压TPV表面的超疏水性最佳;Cassie空气垫模型表明,模压TPV表面的气-液界面的面积分数大于0.8,具有良好的超疏水性。

Superhydrophobic surface on molded polypropylene block copolymer/ethylene propylene diene monomer thermoplastic vulcanizate（TPV）with a blending ratio of 50/50 were constructed by using metallographic sandpaper as molding template,and the superhydrophobicity of the molded TPV was studied. The results showed that,molded TPV had good superhydrophobicity and the thickness of superhydrophobic layer was about 60 μm. The contact angles with water of the TPV surface molded by W5,W7 and W10 sandpapers were more than 150° and the rolling angles were less than 10°,which met the requirement of superhydrophobic surface. The TPV surface molded by W10 sandpaper had the best hydrophobicity. Based on Cassie model,the area fraction of gas-liquid interface on the molded TPV surface was more than 0. 8,indicating good superhydrophobicity.