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中文摘要：
以聚醚酰亚胺（PEI）超滤膜为支撑层，聚二甲基硅氧烷（PDMS）为复合层，制备PDMS／PEI渗透汽化复合膜对流体催化裂化（FCC）汽油脱硫。通过傅立叶红外光谱仪（FTIR-A]限）对PDMS／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（SEM）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，研究了不同聚合物PDMS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，并考察了膜的溶胀性和在长时间操作下的稳定性。
英文摘要：
Crosslinked PDMS/PEI composite membranes were prepared for gasoline sweetening by using PEI UF membrane as the microporous supporting layer and PDMS as the composite membrane. The compositions of the PDMS/PEI composite membrane were characterized by reflection FTIR. The morphologies of the surface and cross - section of PDMS/PEI composite membrane were investigated by scanning electron microscope （SEM）. The pervaporation performances of the PDMS/PEI composite membranes for the separation of thiophene/heptane mixtures were studied. The effects of PDMS concentration, crosslinking temperature, amount of crosslinking agent and crosslinking time, on the separation efficiency of n- heptane/thiophene mixtures were investigated experimentally, and the optimal preparation conditions of PDMS/PEI membranes were obtained. In addition, the swelling degree and the stableness of the composite membranes during long time operation were also studied.
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