Abstract: The preparation of crosslinked porous cornstarch was studied and water adsorption and oil adsorption were investigated. Some factors, such as reaction temperature, reaction time, enzyme addition, enzyme combination, buttom sub- stance concertration and reaction pH were studied as the main factors for water adsorption and oil adsorption capacity. The single element and orthogonal test showed the optimum enzyme reaction condition are as follows: reaction temperature 50℃, reaction time 24h, enzyme addition 2.3%, buttom substance concertration 18%, pH 5.0 and enzyme combination 1:8. Under these conditions, the capacity of water adsorption is 163.21%, and the capacity of oil adsorption is 134.20%.

Key words: crosslinked porous cornstarch, capacity of water adsorption, capacity of oil adsorption