Abstract:

Galloylmicrocrystalline cellulose gallate was synthesized using microcrystalline cellulose (MCC) and gallic acid (GA) as materials at the aid of catalyst. The optimal condition for synthesis was obtained through orthogonal experiments to be 4:1 of GA and MCC, phosphotungstic acid as the catalyst, 10% catalyst based on the amount of gallic acid, reaction at 120 ℃ for 10 h. Products had strong scavenging capability for alkyl free radicals, hydroxyl free radicals and superoxide anion free radicals. The scavenging rate of DPPH free radicals was more than 80%. These investigations will provide fundamental supports for developing anti-oxidative functional materials.

Key words: galloylmicrocrystalline cellulose gallate, antioxidant, synthesis, propertie