SURFACE FREE-ENERGY COMPONENTS OF ALPHA-ALUMINA FROM THIN-LAYER WICKING

被引：65

作者：

HOLYSZ, L ^{[1
]}

CHIBOWSKI, E ^{[1
]}

机构：

[1] MARIE CURIE SKLODOWSKA UNIV,FAC CHEM,DEPT PHYS CHEM,PL-20031 LUBLIN,POLAND

来源：

LANGMUIR | 1992年 / 8卷 / 02期

关键词：

Contact Angles - Surface Free Energy - Thin-Layer Wicking Technique - Washburn Equation;

D O I：

10.1021/la00038a067

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A thin-layer wicking technique (Giese, R. F.; Costanzo, P. M.; van Oss, C. J. Phys. Chem. Miner. 1991, 17,611) and van Oss et al.'s approach to interfacial free energy interactions were applied for determination of the alpha-Al2O3 surface free energy components. For this purpose the penetration rates of n-alkanes, diiodomethane, water, and formamide were measured. The determined values are apolar component gamma(s)LW = 43.7 mJ/m2, electron acceptor component gamma(s)+ = 0.004 mJ/m2, and electron donor component gamma(s)- = 80.5 mJ/m2. It appeared that alpha-Al2O3 is practically a monopolar solid with strong electron donor interactions due to hydrogen bonding.

引用

页码：717 / 721

页数：5

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