Skip to Content
MilliporeSigma
  • Physico-chemical studies and emulsifying properties of N-propyl-N-methylene phosphonic chitosan.

Physico-chemical studies and emulsifying properties of N-propyl-N-methylene phosphonic chitosan.

Carbohydrate polymers (2013-02-13)
Liliana Albertengo, Sonia Farenzena, Adriana Debbaudt, Adriana Zuñiga, Pablo Schulz, Maria Susana Rodriguez
ABSTRACT

Chitosan is a modified, natural carbohydrate polymer derived by deacetylation of chitin. Due to the presence of two functional groups can undergo many chemical modifications. In a previous work we described the synthetic strategy and characterization of a novel soluble derivative: N-propyl-N-methylene phosphonic chitosan (PNMPC). In the study of some physicochemical properties, results showed that this modified chitosan aggregates in several steps when the concentration is increased. By addition of NaOH the initially coiled molecules stretch exposing more phosphonic acid groups to neutralization and finally give a cooperative reaction with OH((). PNMPC has emulsifying properties and gives O/W emulsions with quasi-monodisperse small droplets. Emulsions with 0.18% PNMPC and 30:70 o:w ratio exhibited the best emulsifying properties within the test range. This emulsion ratio showed high stability to long time storage and several successive freeze/thaw and heating/cooling cycles.

MATERIALS
Product Number
Brand
Product Description

Supelco
Sunflower seed oil, analytical standard
Sigma-Aldrich
Sunflower seed oil from Helianthus annuus