Electrospun poly(styrene-block-dimethylsiloxane) block copolymer fibers exhibiting superhydrophobicity

被引：434

作者：

Ma, ML

Hill, RM

Lowery, JL

Fridrikh, SV

Rutledge, GC

机构：

[1] MIT, Dept Chem Engn, Cambridge, MA 01239 USA

[2] Dow Corning Corp, Midland, MI 48686 USA

来源：

LANGMUIR | 2005年 / 21卷 / 12期

关键词：

D O I：

10.1021/la047064y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Block copolymer poly(styrene-b-dimethylsiloxane) fibers with submicrometer diameters in the range 150-400 nm were produced by electrospinning from solution in tetrahydrofuran and dimethylformamide. Contact angle measurements indicate that the nonwoven fibrous mats are superhydrophobic, with a contact angle of 163 degrees and contact angle hysteresis of 15 degrees. The superhydrophobicity is attributed to the combined effects of surface enrichment in siloxane as revealed by X-ray photoelectron spectroscopy and surface roughness of the electrospun mat itself. Additionally, the fibers are shown by transmission electron microscopy to exhibit microphase-separated internal structures. Calorimetric studies confirm the strong segregation between the polystyrene and poly(dimethylsiloxane) blocks.

引用

页码：5549 / 5554

页数：6

共 67 条

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