关键词: 乳液交联法, 多孔淀粉, 吸附, 染料废水

Abstract: Porous starch was prepared by crosslinking from soluble starch through water-in-oil emulsion，with cyclohexane as the oil phase. The amount of cyclohexane was optimized by experiment. A large number of micropores could be seen with scanning electron microscopy. FTIR scanning showed that crosslinking reaction was successful，and a large number of hydroxyl groups still remained. XRD analysis showed that crystallinity was reduced greatly. The specific surface area of the porous starch was 3.456m2/g，oil absorption rate was up to 162%，and the maximum saturated adsorption capacity for methylene blue was 145mg/g. Compared with the porous starch prepared by the enzymatic hydrolysis method，the specific surface area of the porous starch increased 1.6 times，oil absorption rate increased 0.7 times，and maximum saturation adsorption capacity for methylene blue increased nearly 4 times. Through hydrogen bonding，the porous starch adsorbed methylene blue and fuchsin，as a rapid equilibrium process.

Key words: emulsion crosslinking method, porous starch, adsorption, dye wastewater