中文摘要：

采用β-环糊精（β-CD）对沸石（ZSM-5）进行化学改性，得到3种β-CD修饰的沸石，并将改性后的沸石填充到聚醚型聚氨酯（PU）中，制备了3种改性膜。采用红外光谱（FTIR）、扫描电镜（SEM）和热重（TG）手段对改性的沸石以及改性膜进行了结构和热性质表征，考察了不同改性沸石填充膜的渗透汽化脱酚性能。结果表明，填充了改性沸石的PU膜可以有效分离苯酚／水混合物中的苯酚，3种改性沸石填充的膜的渗透通量均显著大于未改性沸石填充膜和空白膜，其中以异氰酸酯为桥联结构接枝环糊精沸石填充膜综合分离性能最佳，对于80℃含0．3％的苯酚水溶液，渗透通量为43．35kg·μm／（m^2·h），分离因子为15．24。

英文摘要：

Three kinds of modified zeolites were prepared with fl-cyclodextrin chemically, and then the modified zeolites were incorporated into polyether-based polyurethane （PU） membrane for the separation of phenol/water mixture by pervaporation. The structures and thermal properties of modified zeolites and zeolites/PU membranes were characterized by Fourier transform infrared spectroscopy （FTIR）, scanning electron microscopy （SEM） and thermal gravimetric analysis （TGA）. The effects of different modified zeolites on separation properties were investigated. The results suggest that zeolites/PU membranes have good performances in the separation of phenol/water mixture. The total flux of modified zeolite membrane is greater than that of the blank membrane, and β-cyclodextrin modified zeolite grafted by isocyanate incorporated PU membrane shows the best overall separating properties among these PU membranes with a separation factor of 15.24 and a total flux of 43.35 kg · μm/（m2 · h） at 80℃.