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中文摘要：
以PEI超滤膜为支撑层，PEG为复合层，制备了PEG／PEI渗透汽化FCC汽油脱硫复合膜．通过傅立叶红外光谱仪对PEG／PEI复合膜表面进行了结构分析，考察了交联前后官能团的变化．通过扫描电子显微镜分析了复合膜表面和断面的形态．将制备的复合膜应用于正庚烷和噻吩体系，首先考察了膜的溶胀性和稳定性．研究了不同聚合物PEG浓度、交联剂浓度，交联温度和交联时间对分离性能的影响，从而得到最佳制膜条件．
英文摘要：
Crosslinked PEG/PEI composite membranes were prepared by using PEI ultrafiltration membrane as the substrate and PEG dense membrane as the composite layer. The compositions of the PEG/PEI composite membranes were characterized by FTIR spectra. The morphologies of the surface and cross - section structures of the PEG/PEI composite membranes were characterized by scanning electron microscope （SEM）. The PEG/ PEI composite membranes were used in the pervaporation separation of n - heptane/thiophene mixtures. The swelling degree of the composite membrane, the effects of amount of PEG, crosslinking temperature, amount of crosslinking agent and crosslinking time, on the separation efficiency of n-heptane/thiophene mixtures were investigated, and the optimal preparation conditions of PEG/PEI membranes were determined.
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