Surface hydrophobicity of fluorinated block copolymers enhanced by supercritical carbon dioxide annealing

被引：19

作者：

Yokoyama, H ^{[1
]}

Sugiyama, K ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nanotechnol Res Inst, Tsukuba, Ibaraki 3058565, Japan

来源：

LANGMUIR | 2004年 / 20卷 / 23期

关键词：

D O I：

10.1021/la0495231

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Supercritical carbon dioxide (scCO(2)) annealing enhances the hydrophobicity of the surfaces of asymmetric perfluorinated block copolymers. X-ray photoelectron spectroscopy (XPS) and contact angle measurement reveal that the surface domains of the fluorinated block (PF) of poly [styrene-block-4-(perfluorooctylpropyloxy)styrene] (PS-PF) become thicker than those annealed in a vacuum. Consequently, the contact angles of water on the surfaces of PS-PF block copolymers significantly increase after the scCO(2) annealing compared to those annealed in a vacuum. The surface hydrophobicity enhanced by the scCO(2) annealing is related to the thickness of the surface PF domain and the conformation of the PF block.

引用

页码：10001 / 10006

页数：6

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