Surface texturing of polytetrafluoroethylene by hot embossing

被引：30

作者：

Jucius, D. ^{[1
]}

Guobiene, A. ^{[1
]}

Grigaliunas, V. ^{[1
,2
]}

机构：

[1] Kaunas Univ Technol, Inst Phys Elect, LT-50131 Kaunas, Lithuania

[2] Kaunas Univ Technol, Int Study Ctr, LT-3000 Kaunas, Lithuania

来源：

APPLIED SURFACE SCIENCE | 2010年 / 256卷 / 07期

关键词：

Polytetrafluoroethylene; Hot embossing; Hydrophobicity; Contact angle; HYDROPHOBIC SURFACES; THIN-FILMS; WETTABILITY; WATER; IRRADIATION; TOPOGRAPHY;

D O I：

10.1016/j.apsusc.2009.09.067

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, hot embossing by reusable Ni mold with features in the form of rectangular diffraction gratings of 4 mu m period was successfully employed for surface texturing of polytetrafluoroethylene (PTFE) film above the glass transition temperature of PTFE amorphous phase with the aim to enhance surface hydrophobicity. Imprint pressure was set to 0.5 MPa and it was at least tenfold lower than reported by other authors using cold stamping. Embossed gratings were clearly seen on the surface of all imprinted samples even after the annealing at 140 degrees C and aging for 1 month at room temperature. The best results were achieved when imprint temperature was 150 degrees C. Measurements of the water contact angle on imprinted PTFE surfaces have showed that increase of the average contact angle for the current test setup was 8 degrees. Using imprint stamp with the more favorable features may lead to somewhat higher hydrophobicity. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：2164 / 2169

页数：6

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