Role of Hydroxyls in Oxide Wettability

被引：103

作者：

Gentleman, M. M. ^{[1
]}

Ruud, J. A. ^{[2
]}

机构：

[1] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA

[2] GE Global Res, Niskayuna, NY USA

来源：

LANGMUIR | 2010年 / 26卷 / 03期

关键词：

ALPHA-AL2O3; 0001; SURFACE; CONTACT-ANGLE; WATER; COMPONENTS; ADHESION; DYNAMICS; ALUMINA;

D O I：

10.1021/la903029c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Oxides are believed to be hydrophilic because of the strong affinity for hydroxylation at their surfaces. This letter explores the relationship between the hydroxylation of oxide surfaces and their resulting wettability. Here we demonstrate that hydroxyls increase the hydrophobicity, or reduce the wettability, or oxide surfaces by reducing the polar component of surface free energy. Using alumina as a model material, increased hydrophobicity with hydroxylation was confirmed experimentally and a correlation between the strength or the hydroxyl-driven hydrophobic response and surface treatment was demonstrated.

引用

页码：1408 / 1411

页数：4

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