Preparation and properties of the succinic ester of porous starch

► PS was prepared using a freezing-solvent exchange technique. ► The reactive PS was modified by SA in a solvent/catalyst-free medium. ► The linear relation DS = 0.0224 + 1.3099 (molar ratio). ► Effect of DS on pore structure, apparent density, moisture, oil and dye adsorption. ► The MB adsorption process fitted the pseudo second-order model.