Surface characterization of poly(4-vinylpyridine) quaternized with tetradecyl bromide: Effect of the degree of quaternization

Ligia Gargallo, Beatriz Miranda, Angel Leiva, Hernan Ríos, Fernando González-Nilo, Deodato Radić

Resultado de la investigación: Article

5 Citas (Scopus)

Resumen

The surface behavior of poly(4-vinylpyridine) quaternized with tetradecyl bromide (P4VPC14) as function of the quaternization degree was studied. The percentage of vinylpyridine moieties quaternized was found to be 35 to 75%. Surface pressure-area isotherms (π-A) at the air-water interface were determined. The polymer monolayers show particular shapes at different quaternization degrees. In order to get information about the hydrophobicity degree of the polymeric systems, the surface energy (SE), and their dispersion and polar contributions, γD and γP respectively, measurements of the contact angle (CA) with water, bromobenzene, and cis-decalin were performed. The results obtained are dependent on the quaternization percentage of the functionalized polymers. At high quaternization degree, hysteresis in the π-A diagrams was observed. The change in the P4VPC14 molecular organization in the monolayer was also investigated during the compression and expansion processes. During these processes the monolayer was monitored by Brewster angle microscopy (BAM). For several cycles, all compression curves and all expansion curves showed a common intersection point. We have tried to describe the P4VPC14 molecular organization at the air-water interface by molecular dynamic simulation (MDS). The results are also discussed in terms of the effect of the counterions and water on the stability of the system over the more packed region.

Idioma originalEnglish
Páginas (desde-hasta)181-186
Número de páginas6
PublicaciónJournal of Colloid and Interface Science
Volumen271
N.º1
DOI
EstadoPublished - 1 mar 2004

Huella dactilar

Bromides
bromides
Monolayers
Water
water
Polymers
expansion
Brewster angle
air
polymers
curves
Hydrophobicity
hydrophobicity
Air
Interfacial energy
intersections
surface energy
Contact angle
Isotherms
Hysteresis

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials

Citar esto

Gargallo, Ligia ; Miranda, Beatriz ; Leiva, Angel ; Ríos, Hernan ; González-Nilo, Fernando ; Radić, Deodato. / Surface characterization of poly(4-vinylpyridine) quaternized with tetradecyl bromide : Effect of the degree of quaternization. En: Journal of Colloid and Interface Science. 2004 ; Vol. 271, N.º 1. pp. 181-186.
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abstract = "The surface behavior of poly(4-vinylpyridine) quaternized with tetradecyl bromide (P4VPC14) as function of the quaternization degree was studied. The percentage of vinylpyridine moieties quaternized was found to be 35 to 75{\%}. Surface pressure-area isotherms (π-A) at the air-water interface were determined. The polymer monolayers show particular shapes at different quaternization degrees. In order to get information about the hydrophobicity degree of the polymeric systems, the surface energy (SE), and their dispersion and polar contributions, γD and γP respectively, measurements of the contact angle (CA) with water, bromobenzene, and cis-decalin were performed. The results obtained are dependent on the quaternization percentage of the functionalized polymers. At high quaternization degree, hysteresis in the π-A diagrams was observed. The change in the P4VPC14 molecular organization in the monolayer was also investigated during the compression and expansion processes. During these processes the monolayer was monitored by Brewster angle microscopy (BAM). For several cycles, all compression curves and all expansion curves showed a common intersection point. We have tried to describe the P4VPC14 molecular organization at the air-water interface by molecular dynamic simulation (MDS). The results are also discussed in terms of the effect of the counterions and water on the stability of the system over the more packed region.",
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Surface characterization of poly(4-vinylpyridine) quaternized with tetradecyl bromide : Effect of the degree of quaternization. / Gargallo, Ligia; Miranda, Beatriz; Leiva, Angel; Ríos, Hernan; González-Nilo, Fernando; Radić, Deodato.

En: Journal of Colloid and Interface Science, Vol. 271, N.º 1, 01.03.2004, p. 181-186.

Resultado de la investigación: Article

TY - JOUR

T1 - Surface characterization of poly(4-vinylpyridine) quaternized with tetradecyl bromide

T2 - Effect of the degree of quaternization

AU - Gargallo, Ligia

AU - Miranda, Beatriz

AU - Leiva, Angel

AU - Ríos, Hernan

AU - González-Nilo, Fernando

AU - Radić, Deodato

PY - 2004/3/1

Y1 - 2004/3/1

N2 - The surface behavior of poly(4-vinylpyridine) quaternized with tetradecyl bromide (P4VPC14) as function of the quaternization degree was studied. The percentage of vinylpyridine moieties quaternized was found to be 35 to 75%. Surface pressure-area isotherms (π-A) at the air-water interface were determined. The polymer monolayers show particular shapes at different quaternization degrees. In order to get information about the hydrophobicity degree of the polymeric systems, the surface energy (SE), and their dispersion and polar contributions, γD and γP respectively, measurements of the contact angle (CA) with water, bromobenzene, and cis-decalin were performed. The results obtained are dependent on the quaternization percentage of the functionalized polymers. At high quaternization degree, hysteresis in the π-A diagrams was observed. The change in the P4VPC14 molecular organization in the monolayer was also investigated during the compression and expansion processes. During these processes the monolayer was monitored by Brewster angle microscopy (BAM). For several cycles, all compression curves and all expansion curves showed a common intersection point. We have tried to describe the P4VPC14 molecular organization at the air-water interface by molecular dynamic simulation (MDS). The results are also discussed in terms of the effect of the counterions and water on the stability of the system over the more packed region.

AB - The surface behavior of poly(4-vinylpyridine) quaternized with tetradecyl bromide (P4VPC14) as function of the quaternization degree was studied. The percentage of vinylpyridine moieties quaternized was found to be 35 to 75%. Surface pressure-area isotherms (π-A) at the air-water interface were determined. The polymer monolayers show particular shapes at different quaternization degrees. In order to get information about the hydrophobicity degree of the polymeric systems, the surface energy (SE), and their dispersion and polar contributions, γD and γP respectively, measurements of the contact angle (CA) with water, bromobenzene, and cis-decalin were performed. The results obtained are dependent on the quaternization percentage of the functionalized polymers. At high quaternization degree, hysteresis in the π-A diagrams was observed. The change in the P4VPC14 molecular organization in the monolayer was also investigated during the compression and expansion processes. During these processes the monolayer was monitored by Brewster angle microscopy (BAM). For several cycles, all compression curves and all expansion curves showed a common intersection point. We have tried to describe the P4VPC14 molecular organization at the air-water interface by molecular dynamic simulation (MDS). The results are also discussed in terms of the effect of the counterions and water on the stability of the system over the more packed region.

KW - Air-water interface

KW - Brewster angle microscopy

KW - Molecular dynamic simulation

KW - Monolayers

KW - Quaternization degree

KW - Surface pressure-area (π-A) isotherms

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