制备超疏水聚乙烯薄膜的直接催化路线。

Direct catalytic route to superhydrophobic polyethylene films.

作者信息

Han Wei, Wu Di, Ming Weihua, Niemantsverdriet Hans J W, Thüne Peter C

机构信息

Schuit Institute of Catalysis and Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.

出版信息

Langmuir. 2006 Sep 12;22(19):7956-9. doi: 10.1021/la061414u.

DOI:10.1021/la061414u

PMID:16952226

Abstract

Polyethylene films grow on a flat silica surface modified by the bis(imino)pyridyl iron(II) catalyst during ethylene polymerization in toluene solvent. The resulting films show superhydrophobic properties. Advancing water contact angle as high as 169 degrees and sliding angles as low as 2 degrees are obtained on these films. SEM images reveal special surface structures of these films containing micrometer-sized islands, submicrometer particles on the islands, and stress nanofibers between the islands, which render superhydrophobicity to the polyethylene surfaces. After the submicrometer particles and stress nanofibers are removed by annealing, the superhydrophobic properties of the polymer films disappear.

摘要

在甲苯溶剂中进行乙烯聚合反应时，聚乙烯薄膜在由双（亚氨基）吡啶铁（II）催化剂改性的平坦二氧化硅表面上生长。所得薄膜具有超疏水性能。在这些薄膜上测得的前进水接触角高达169度，滑动角低至2度。扫描电子显微镜图像揭示了这些薄膜的特殊表面结构，包括微米级的岛状物、岛上的亚微米颗粒以及岛之间的应力纳米纤维，这些结构使聚乙烯表面具有超疏水性。通过退火去除亚微米颗粒和应力纳米纤维后，聚合物薄膜的超疏水性能消失。