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

Ligia Gargallo; Danitza Vargas; Angel Leiva; Deodato Radić

doi:10.1016/j.jcis.2006.05.024

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

Ligia Gargallo
, Danitza Vargas
, Angel Leiva
, Deodato Radić

Pontificia Universidad Católica de Chile

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

The surface properties of the supramolecular inclusion complex (IC) obtained from the threading of α-cyclodextrin (α-CD) onto poly(ethylene oxide) (PEO) free in solution are studied. The complexes were characterized by IR, ¹H NMR spectroscopy, and thermal analysis. The variation of the interfacial tension, γ_int, with inclusion complex (IC) concentration and temperature were determined. The results were compared with those found for PEO under the same conditions. α-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 α-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 α-CD.

Original language	English
Pages (from-to)	607-611
Number of pages	5
Journal	Journal of Colloid and Interface Science
Volume	301
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2006.05.024
State	Published - 15 Sep 2006
Externally published	Yes

Keywords

Adsorption layers
Hydrophobicity
Inclusion complex
Surface activity
α-Cyclodextrin

Access to Document

10.1016/j.jcis.2006.05.024

Cite this

@article{43b2fb79736848b6a37b825ca370d86a,

title = "Surface properties of inclusion complexes between α-cyclodextrin and poly(ethylene oxide)",

abstract = "The surface properties of the supramolecular inclusion complex (IC) obtained from the threading of α-cyclodextrin (α-CD) onto poly(ethylene oxide) (PEO) free in solution are studied. The complexes were characterized by IR, 1H NMR spectroscopy, and thermal analysis. The variation of the interfacial tension, γint, with inclusion complex (IC) concentration and temperature were determined. The results were compared with those found for PEO under the same conditions. α-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 α-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 α-CD.",

keywords = "Adsorption layers, Hydrophobicity, Inclusion complex, Surface activity, α-Cyclodextrin",

author = "Ligia Gargallo and Danitza Vargas and Angel Leiva and Deodato Radi{\'c}",

year = "2006",

month = sep,

day = "15",

doi = "10.1016/j.jcis.2006.05.024",

language = "English",

volume = "301",

pages = "607--611",

journal = "Journal of Colloid and Interface Science",

issn = "0021-9797",

number = "2",

}

TY - JOUR

T1 - Surface properties of inclusion complexes between α-cyclodextrin and poly(ethylene oxide)

AU - Gargallo, Ligia

AU - Vargas, Danitza

AU - Leiva, Angel

AU - Radić, Deodato

PY - 2006/9/15

Y1 - 2006/9/15

N2 - The surface properties of the supramolecular inclusion complex (IC) obtained from the threading of α-cyclodextrin (α-CD) onto poly(ethylene oxide) (PEO) free in solution are studied. The complexes were characterized by IR, 1H NMR spectroscopy, and thermal analysis. The variation of the interfacial tension, γint, with inclusion complex (IC) concentration and temperature were determined. The results were compared with those found for PEO under the same conditions. α-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 α-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 α-CD.

AB - The surface properties of the supramolecular inclusion complex (IC) obtained from the threading of α-cyclodextrin (α-CD) onto poly(ethylene oxide) (PEO) free in solution are studied. The complexes were characterized by IR, 1H NMR spectroscopy, and thermal analysis. The variation of the interfacial tension, γint, with inclusion complex (IC) concentration and temperature were determined. The results were compared with those found for PEO under the same conditions. α-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 α-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 α-CD.

KW - Adsorption layers

KW - Hydrophobicity

KW - Inclusion complex

KW - Surface activity

KW - α-Cyclodextrin

UR - https://www.scopus.com/pages/publications/33747059605

U2 - 10.1016/j.jcis.2006.05.024

DO - 10.1016/j.jcis.2006.05.024

M3 - Article

C2 - 16780856

AN - SCOPUS:33747059605

SN - 0021-9797

VL - 301

SP - 607

EP - 611

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

IS - 2

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this