乳液模板法制备酚醛树脂基多孔碳材料的研究

Study on the Preparation of Porous Carbon Foams Using Emulsion Templating Method

多级孔结构的碳泡沫材料具有三维相互连接的多孔结构,具有大孔、中孔和微孔三级孔结构,这种多孔碳材料可以由水包油乳液为模板来制备。这种水包油乳液模板用酚醛溶液为连续相,环己烷为分散相。本文中,我们研究了酚醛溶液的粘度、环己烷与酚醛溶液的质量分率和亲水性乳化剂Tween80在酚醛溶液中的浓度对多孔碳材料孔径的影响。结果表明,酚醛溶液的粘度在合适的值才能制得孔径分布较窄的多孔碳材料,环己烷与酚醛溶液的质量分率的提高和乳化剂在酚醛溶液中浓度的降低都会使制得的多孔碳材料的孔径变大。用浓乳液可以制得孔隙率超过90%的多孔碳材料。

Porous carbon foams possessing three-dimensionally interconnected porous structure could be synthesized by emulsion templating method. For the preparation of emulsion a resorcinol-formaldehyde solution and cyclohexane were used. It was revealed that the size of the macropores increased with the increase in the mass ratio of cyclohexane with the RF solution or with the decrease in the concentration of surfactant.