Synthesis and swelling behavior of xanthan-based hydrogels

► Xanthan was crosslinked by heating esterification, forming hydrogels. ► Tensiometry allowed understanding the swelling mechanism of xanthan hydrogels. ► Quasi-Fickian, Fickian and Anomalous Diffusion were observed for hydrogels. ► Swelling degree increased at high pH values due to ester linkages rupture. ► Swelling degree was affected by salts, depending on gel composition and salt.