大孔树脂对阿维菌素吸附性能的分形研究

介孔材料由于其特殊的结构而具有很高的活性和极大的吸附容量,一般的表征方法不能反映其中孔的真实情况。采用FHH法和NK法计算了大孔苯乙烯树脂的分维,分析了大孔树脂吸附阿维菌素的分形模型;探讨了分形维数对树脂吸附性能的影响规律。结果表明,NK法更能适用于对苯乙烯树脂孔道结构的表征,树脂对阿维菌素的吸附能力也随着NK分维的增大而增大。因而,用分形理论研究大孔树脂结构与性能的关系是可行的。

Research on Fractal Characterization of Adsorption of Macroporous Resins to Avermectins

Mesoporous materials exhibit high activity and sorption capacity due to peculiar structure. However, the pores are difficult to be characterized with traditional methods. In this paper, fractal dimension of macroporous crosslinked polystyrenes were calculated via FHH and NK methods respectively. The adsorption of macroporous resins to avermectins was analyzed to investigate the effect of fractal dimension on the adsorbing performance of resins. The results showed that NK method was more suitable for characterizing the fractal structure of polystyrene. The adsorbing capacity of resins increased when NK fractal dimension became higher. Consequently, fractal theories are shown to be promising in studying the structure and adsorbing capacity of macroporous resins.