Contact angle measurements by axisymmetric drop shape analysis and an automated polynomial fit program

被引：61

作者：

del Río, OI ^{[1
]}

Kwok, DY ^{[1
]}

Wu, R ^{[1
]}

Alvarez, JM ^{[1
]}

Neumann, AW ^{[1
]}

机构：

[1] Univ Toronto, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1998年 / 143卷 / 2-3期

关键词：

contact angle; drop shape; polynomial fit; dynamic; surface tension; from contact angle; fluorocarbon;

D O I：

10.1016/S0927-7757(98)00257-X

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：

Low-rate dynamic contact angles of eight liquids on an inert (non-polar) FC-722 surface and a non-inert (polar) poly(propene-alt-N-methylmaleimide) copolymer are reported using two different contact angle methods: axisymmetric drop shape analysis (ADSA) and an automated polynomial fit (APF) scheme. The latter technique was found to be more sensitive to minute surface heterogeneity and/or roughness of the surface. For the non-inert solid-liquid systems, very complex contact angle responses were observed with both methods. If one omits these inconclusive contact angle measurements, the values of gamma(1v) cos theta change smoothly with gamma(1v) for these polymers, independent of which of the two methods is used. When comparing with previously studied maleimide copolymer surfaces, a consistent change in the wettability was observed as the length of the side chains decreases from hexyl to methyl groups. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：197 / 210

页数：14

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