“Hydrodynamic parameters of chañar brea gum”

MARÍA FERNANDA TORRES; KAREN GIL MILAC; M.A. MASUELLI

IASI

Conferencia; CONFERENCE ON RHEOLOGY; 2022

"Petru Poni" Institute of Macromolecular Chemistry

Chañar Brea Gum (CBG) is a hydrocolloid obtained as an exudate from the Cercidium praecox tree. CBG could be also used as additive or excipient for pharmacological formulations. This work reports intrinsic viscosity, coil overlap, and Mark–Houwink–Kuhn–Sakurada (MHKS) parameters of CBG solutions. Partially hydrolysed BG solution was analysed using intrinsic viscosity measurements, dynamic light scattering and size-exclusion chromatography (SEC). The MHKS parameters, a and k, were determined for CBG at 25 °C, with values of 0.4133 and 0.1347 cm3 g-1, respectively. The viscometric molecular weight of CBG was 1890 kg mol-1. The hydrodynamic parameters of CBG were indicative of a hyperbranched structure and spherical conformation. The knowledge obtained on the physicochemical properties of CBG favours its use in food and pharmaceutical applications.