多尺度纳米结构聚合物和金属超疏水表面的润湿性

Wetting properties of the multiscaled nanostructured polymer and metallic superhydrophobic surfaces.

作者信息

Bormashenko Edward, Stein Tamir, Whyman Gene, Bormashenko Yelena, Pogreb Roman

机构信息

The College of Judea and Samaria, the Research Institute, 44837, Ariel, Israel.

出版信息

Langmuir. 2006 Nov 21;22(24):9982-5. doi: 10.1021/la061622m.

DOI:10.1021/la061622m

PMID:17106989

Abstract

A superhydrophobic surface is produced from industrial grade polymer materials. The surface comprises partly disordered triple-scaled arrays of polyvinylidene fluoride (PVDF) globules. An inherently superhydrophobic metallic surface is produced with polymer template. The mathematical model based on the Cassie-Baxter hypothesis of air trapping under a water drop is built, which gives the apparent contact angle on the manifold-scaled interface. The presence of several scales itself is not a sufficient condition of hydrophobicity of inherently wettable surfaces. The geometrical features favoring the increase of the vapor-water interface fraction are necessary for this phenomenon.

摘要

超疏水表面由工业级聚合物材料制成。该表面包含部分无序的聚偏二氟乙烯（PVDF）球粒的三重尺度阵列。利用聚合物模板制备出具有固有超疏水性的金属表面。基于水滴下空气捕获的卡西 - 巴克斯特假设建立了数学模型，该模型给出了多尺度界面上的表观接触角。对于固有可湿性表面，多个尺度的存在本身并不是疏水性的充分条件。有利于气 - 水界面分数增加的几何特征对于这种现象是必要的。