Your browser doesn't support javascript.
loading
Comparison between the interactions of the cationic surfactant DODAB with xanthan and galactomannan.
Kaminski, Gabriel A T; Sierakowski, Maria Rita; Pontarolo, Roberto; de Freitas, Rilton Alves.
Afiliação
  • Kaminski GA; BioPol Laboratory, Chemistry Department, Federal University of Paraná, R. Coronel F. H. dos Santos 210, 81531-980 Curitiba, Paraná, Brazil; CEB, Pharmacy Department, Federal University of Paraná, Av. Prof. Lothário Meissner 3400, 80210-170 Curitiba, Paraná, Brazil.
  • Sierakowski MR; BioPol Laboratory, Chemistry Department, Federal University of Paraná, R. Coronel F. H. dos Santos 210, 81531-980 Curitiba, Paraná, Brazil.
  • Pontarolo R; CEB, Pharmacy Department, Federal University of Paraná, Av. Prof. Lothário Meissner 3400, 80210-170 Curitiba, Paraná, Brazil.
  • de Freitas RA; BioPol Laboratory, Chemistry Department, Federal University of Paraná, R. Coronel F. H. dos Santos 210, 81531-980 Curitiba, Paraná, Brazil. Electronic address: rilton@quimica.ufpr.br.
Carbohydr Polym ; 115: 478-84, 2015 Jan 22.
Article em En | MEDLINE | ID: mdl-25439922
The interactions of the cationic surfactant DODAB with anionic xanthan (XAN) and nonionic galactomannan (GMC) polysaccharides in solution were investigated using tensiometry, differential scanning microcalorimetry (µ-DSC), zeta potential and dynamic light scattering (DLS) techniques and by the calculated thermodynamic parameters of ΔG(ves)(0), ΔG(ads)(0), Γ(max) and a(min). The surfactant formed large unilamellar vesicles (LUV) that aggregated with both the polymers in solution. Increasing DODAB concentrations resulted in greater and greater DODAB-XAN aggregates, high turbidity and even precipitation, while DODAB-GMC aggregates remained equal sized, clear solution and no precipitation observed. Further addition of DODAB to XAN solution was able to resuspend the precipitates. The interactions with both polysaccharides resulted in a more spontaneous adsorption of the DODAB-polymer aggregates at the air/solution interface with lower surfactant population.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polissacarídeos Bacterianos / Tensoativos / Compostos de Amônio Quaternário / Mananas Idioma: En Revista: Carbohydr Polym Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polissacarídeos Bacterianos / Tensoativos / Compostos de Amônio Quaternário / Mananas Idioma: En Revista: Carbohydr Polym Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido