Surfactant properties of chemically modified chitooligosaccharides and their potential application in bitumen emulsions

Chitooligosaccharides with degree of polymerization from 5 to 15 have been modified different lipophilic chains, fatty epoxide acids. Their interfacial properties such as critical micellar concentrations, rheology and tension were studied establish structure-properties relationships. ability self-assemble well their shape assessed by light scattering (dynamic static) transmission electron microscopic analyses. Finally, emulsion stabilities rheological evaluated Turbiscan allow the conclusion that 1% (w/w) DP10 oligomers Tall oil acid was able stabilize in water emulsions (60/40 w/w) for at least 55 days. • Properties chitosan-based surfactant are related structure. Chitosan based surfactants present interesting properties. non-ecotoxic give days stabilization.