Surface properties of inclusion complexes between α-cyclodextrin and poly(ethylene oxide)

被引：14

作者：

Gargallo, Ligia ^{[1
]}

Vargas, Danitza ^{[1
]}

Leiva, Angel ^{[1
]}

Radic, Deodato ^{[1
]}

机构：

[1] Pontificia Univ Catolica Chile, Fac Quim, Dept Quim Fis, Santiago 22, Chile

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2006年 / 301卷 / 02期

关键词：

adsorption layers; inclusion complex; alpha-cyclodextrin; hydrophobicity; surface activity;

D O I：

10.1016/j.jcis.2006.05.024

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：

k The surface properties of the supramolecular inclusion complex (IC) obtained from the threading of alpha-cyclodextrin (alpha-CD) onto poly(ethylene oxide) (PEO) free in solution are studied. The complexes were characterized by IR, H-1 NMR spectroscopy, and thermal,analysis. The variation of the interfacial tension, gamma(int), with inclusion complex (IC) concentration and temperature were determined. The results were compared with those found for PEO under the same conditions. alpha-CD does not present surface activity. To quantify the adsorption process of IC and PEO in aqueous medium, the Gibbs equation was used. The driving force for adsorption of IC at the air/aqueous interface seems to arise from an enthalpic contribution. The wettability of the alpha-CD, PEO, and IC films with two liquids was determined by static contact angle measurements. The hydrophobicity degree was estimated. IC is more hydrophobic than PEO and alpha-CD. (c) 2006 Elsevier Inc. All rights reserved.

引用

页码：607 / 611

页数：5

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