Sulfation of Aegle marmelos gum: Synthesis, physico-chemical and functional characterization

► Ratio of CSA:Pyr was found to exert maximum influence on the degree of substitution ► FTIR-ATR and NMR studies confirmed sulfation to have occurred in the gum. ► sBFG2 gave higher swelling in both acidic and alkaline pH. ► sBFG2 was superior firmness, cohesiveness, consistency and index of viscosity. ► sBFG2 exhibited greater viscosity and work of shear.