羧甲基取代度对聚羧甲基-β-环糊精吸附苯酚性能的影响

摘要

以羧甲基-β-环糊精(CM-β-CD)为原料,环氧氯丙烷为交联剂,合成了聚羧甲基-β-环糊精(PCM-β-CD).考察了PCM-β-CD取代度对苯酚的吸附能力以及吸附条件对吸附量的影响.结果表明,羧甲基取代度较小的PCM-β-CD吸附苯酚的能力强；PCM-β-CD吸附苯酚时,振荡30 min达到吸附平衡,吸附量随苯酚质量浓度的增加而增加,pH=5～6、低温效果较好；PCM-β-CD对苯酚的吸附符合Freundlich等温方程.IR和XRD分析表明,PCM-β-CD吸附苯酚形成了包合物.%Poly-carboxymethyl-β-cyclodextrin(PCM-β-CD) were synthesized based on carboxymethyl-β-cy-clodextrin as material, epichlorohydrin as crosslinker. The adsorption of phenol and the adsorption condi-tion effects of PCM-β-CD with substitutions were investigated. The results showed that PCM-β-CD with lower degree of substitution had higher adsorption capabilities, the adsorption equilibrium was reached af-ter 30 min of shaking, and the adsorption was increased with the increase of initial concentration of phe-nol. The favorite adsorption was obtained at pH 5～6 and low temperature. The adsorption equilibrium fit the Freundlich isotherm equation. IR and XRD analysis showed that the polymer have formed the inclu-sion compounds with phenol.