Modification of the air-water interface by a chitosan adsorption process. Effect on an amphiphilic polymer monolayer

Ligia Gargallo; Angel Leiva; Marcela Urzúa; Luz Alegría; Beatriz Miranda; Deodato Radić

doi:10.1002/pi.1474

Modification of the air-water interface by a chitosan adsorption process. Effect on an amphiphilic polymer monolayer

Ligia Gargallo
, Angel Leiva
, Marcela Urzúa
, Luz Alegría
, Beatriz Miranda
, Deodato Radić

Pontificia Universidad Católica de Chile

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

11 Scopus citations

Abstract

Monolayer formation by poly[(maleic anhydride)-alt-(stearyl methacrylate)] (MA-alt-StM) on aqueous subphases, with and without chitosan, was studied by the Langmuir technique. Chitosan (CS) modified considerably the shape of the MA-alt-StM isotherms on water. To explain this behavior, the surface activity properties of chitosan at the air-solution interface were studied. The variations of the interfacial tension, γ_int with chitosan concentration and temperature, were also determined. The results were discussed in terms of the modification of the air-water interface owing to the presence of chitosan in the subphase and the surface activity. It was found that the standard free energy of adsorption, ΔG_ads⁰, values were dependent on the degree of acetylation (DA) over the DA range being studied.

Original language	English
Pages (from-to)	1652-1657
Number of pages	6
Journal	Polymer International
Volume	53
Issue number	11
DOIs	https://doi.org/10.1002/pi.1474
State	Published - Nov 2004
Externally published	Yes

Keywords

Chitosan
Degree of acetylation
Interfacial tension
Langmuir monolayer
Standard free energy of adsorption

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10.1002/pi.1474

Cite this

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title = "Modification of the air-water interface by a chitosan adsorption process. Effect on an amphiphilic polymer monolayer",

abstract = "Monolayer formation by poly[(maleic anhydride)-alt-(stearyl methacrylate)] (MA-alt-StM) on aqueous subphases, with and without chitosan, was studied by the Langmuir technique. Chitosan (CS) modified considerably the shape of the MA-alt-StM isotherms on water. To explain this behavior, the surface activity properties of chitosan at the air-solution interface were studied. The variations of the interfacial tension, γint with chitosan concentration and temperature, were also determined. The results were discussed in terms of the modification of the air-water interface owing to the presence of chitosan in the subphase and the surface activity. It was found that the standard free energy of adsorption, ΔGads0, values were dependent on the degree of acetylation (DA) over the DA range being studied.",

keywords = "Chitosan, Degree of acetylation, Interfacial tension, Langmuir monolayer, Standard free energy of adsorption",

author = "Ligia Gargallo and Angel Leiva and Marcela Urz{\'u}a and Luz Alegr{\'i}a and Beatriz Miranda and Deodato Radi{\'c}",

year = "2004",

month = nov,

doi = "10.1002/pi.1474",

language = "English",

volume = "53",

pages = "1652--1657",

journal = "Polymer International",

issn = "0959-8103",

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TY - JOUR

T1 - Modification of the air-water interface by a chitosan adsorption process. Effect on an amphiphilic polymer monolayer

AU - Gargallo, Ligia

AU - Leiva, Angel

AU - Urzúa, Marcela

AU - Alegría, Luz

AU - Miranda, Beatriz

AU - Radić, Deodato

PY - 2004/11

Y1 - 2004/11

N2 - Monolayer formation by poly[(maleic anhydride)-alt-(stearyl methacrylate)] (MA-alt-StM) on aqueous subphases, with and without chitosan, was studied by the Langmuir technique. Chitosan (CS) modified considerably the shape of the MA-alt-StM isotherms on water. To explain this behavior, the surface activity properties of chitosan at the air-solution interface were studied. The variations of the interfacial tension, γint with chitosan concentration and temperature, were also determined. The results were discussed in terms of the modification of the air-water interface owing to the presence of chitosan in the subphase and the surface activity. It was found that the standard free energy of adsorption, ΔGads0, values were dependent on the degree of acetylation (DA) over the DA range being studied.

AB - Monolayer formation by poly[(maleic anhydride)-alt-(stearyl methacrylate)] (MA-alt-StM) on aqueous subphases, with and without chitosan, was studied by the Langmuir technique. Chitosan (CS) modified considerably the shape of the MA-alt-StM isotherms on water. To explain this behavior, the surface activity properties of chitosan at the air-solution interface were studied. The variations of the interfacial tension, γint with chitosan concentration and temperature, were also determined. The results were discussed in terms of the modification of the air-water interface owing to the presence of chitosan in the subphase and the surface activity. It was found that the standard free energy of adsorption, ΔGads0, values were dependent on the degree of acetylation (DA) over the DA range being studied.

KW - Chitosan

KW - Degree of acetylation

KW - Interfacial tension

KW - Langmuir monolayer

KW - Standard free energy of adsorption

UR - https://www.scopus.com/pages/publications/6444225664

U2 - 10.1002/pi.1474

DO - 10.1002/pi.1474

M3 - Article

AN - SCOPUS:6444225664

SN - 0959-8103

VL - 53

SP - 1652

EP - 1657

JO - Polymer International

JF - Polymer International

IS - 11

ER -

Modification of the air-water interface by a chitosan adsorption process. Effect on an amphiphilic polymer monolayer

Abstract

Keywords

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