本文制备C60含量不同的乙基纤维素（EC）/C60复合膜，采用UV-visible spectrum、AFM和XRD等手段对紫外光辐照前后复合膜结构进行表征，并考察其对气体分离及渗透性能的影响。结果表明，复合膜经紫外光辐照后，C60在膜表面的分布由独立的簇状结构转变为连续平缓的丘陵状结构，膜表面更加致密光滑；复合膜分子链间距未发生明显变化，但对N2、CO2、H2的渗透性能和H2/N2、CO2/N2分离性能产生明显影响。当C60添加量达到16‰时，未经紫外光辐照的复合膜对CO2及H2的透气系数较纯EC膜分别提高了30%和40%，分别达到61.29 Barrer 和78.88 Barrer，对H2/N2，CO2/N2理想分离系数增至纯EC膜的1.47和1.38倍，分别达到9.979和12.84；经紫外光辐照后，高C60含量的EC/C60复合膜能够保持纯EC膜对CO2和H2的透过水平，而对H2/N2和CO2/N2的分离性能增至纯EC膜的2.30和2.43倍，分别达到17.49，25.60。

Ethyl cellulose/C60 composite membranes were prepared in benzene, the membrane structure were  studied by UV-visible spectrum, Atomic force microscopy (AFM) and X-ray diffraction (XRD) and  gas permeation tests were also implemented before and after UV irradiation. Results showed C60 morphology in the composite membranes by the independent cluster structure before UV irradiation and continuous gentle hill-like structure after UV irradiation, the d-spacing of the composite membrane did not change before and after UV irradiation. The change of C60 clusters morphology could influence the gas separation property of the composite membranes, when the C60 loading content raised to 16‰ before irradiation, the permeability coefficient of CO2 and H2 of composite membrane were 61.29 Barrer and 78.88 Barrer, 1.3 and 1.4 times of pure EC membrane, while ideal separation factor of H2/N2 , CO2/N2 were 9.979 and 12.84, 1.47 and 1.38 times of pure EC membrane; when irradiated by UV light source, EC/C60 composite membrane could maintain permeability of CO2 and H2 on the level of pure EC membrane, and the ideal separation factor of H2/N2 and CO2/N2 were 17.49 and 25.60, 2.30 and 2.43 times pure EC membranes at high C60 loading content.
 

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