膜科学与技术

位置：首页 >> 期刊内容阅读

乙基纤维素/C60复合膜制备及气体分离性能研究

作者：马诚，孔瑛，杨金荣

单位：中国石油大学（华东）重质油国家重点实验室，青岛，266555

关键词： C60，EC/C60复合膜，紫外光辐照，气体分离性能

DOI号：

分类号： O63

出版年,卷(期):页码： 2012,32(3):52-58

摘要：

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.

基金项目：

教育部创新团队“重质油高效转化的绿色化学与工程”（编号：IRT0759）, 教育部高等学校博士学科点专项科研基金（20090133120008）, 山东省自然科学基金（ZR2009BQ011）

作者简介：

马诚（1982-），男，辽宁辽阳人，博士研究生，主要从事气体分离膜材料的研究，E-mail: kkmc1982@yahoo.cn **通讯联系人：孔瑛，主要研究方向：高分子材料、膜分离，

参考文献：

[1]      H. W. Kroto, A. W. Allaf, S. P. Balm. C60: Buckminster fullerene[J]. Chem. Rev. , 1991, 91: 1213-1235.
[2] L. M. Robeson. Correlation of separation factor versus permeability for polymeric membranes [J]. Journal of Membrane Science, 1991( 62): 165.
[3] L. M. Robeson, M. Lloyd. The upper bound revisited [J]. Journal of Membrane Science, 2008, 320: 390-400.
[4]      沈海军, 刘根林. 新型碳纳米材料—碳富勒烯[M]. 北京: 国防工业出版社. 2008: 15-16.
        Shen Haijun, Liu Genlin. New carbon nano-materials - carbon fullerenes[M]. Beijing: National Defence Industry Press. 2008: 15-16
[5]      丁孟贤. 聚酰亚胺：化学、结构与性能的关系及材料[M]. 北京：科学出版社, 2006: 680-693.
Ding Mengxian. Poyimides: Chemistry, Relationship between structure and properties and materials[M]. Beijing: Science Press, 2006: 672
[6]      王建国. 高分子合成新技术[M]. 北京: 化学工业出版社, 2004: 183.
        Wang Jianguo. Polymer synthesis technology[M]. Beijing: Chemical Industry Press, 2004: 183.
[7]      E. Alvarez-Zauco, H. Sobral, E. V. Basiuk, et al. Polymerization of C60 fullerene thin ?lms by UV pulsed laser irradiation[J]. Applied Surface Science, 2005, 248: 243–247.
[8]      Q. Hu, E. Marand, S. D. hingra, et al. Poly(amideimide)/TiO2 nano-composite gas separation membranes: fabrication and characterization[J]. Journal of Membrane Science, 1997, 135: 65-79.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com