为制备C60含量不同的乙基纤维素(EC)/C60复合膜,采用UV-可见光谱、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1.6％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61.29Barrer和78.88 Barter,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和25.60.
参考文献
| [1] | Kroto H W;Allaf A V;Balm S P .C60:Buckminster fullerene[J].Chemical Reviews,1991,91:12131235. |
| [2] | Robeson L M .Correlation of separation factor versus permeability for polymeric membranes[J].Journal of Membrane Science,1991,62:165. |
| [3] | Robeson L M;Lloyd M .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. |
| [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. |
| [6] | 王建国.高分子合成新技术[M].北京:化学工业出版社,2004:183. |
| [7] | E. Alvarez-Zauco;H. Sobral;E.V. Basiuk;J.M. Saniger-Blesa;M. Villagran-Muniz .Polymerization of C_(60) fullerene thin films by UV pulsed laser irradiation[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2005(1/4):243-247. |
| [8] | Hu Q.;Dhingra S.;Fritsch D.;Wen J.;Wilkes G.;Marand E. .POLY(AMIDE-IMIDE)/TIO2 NANO-COMPOSITE GAS SEPARATION MEMBRANES - FABRICATION AND CHARACTERIZATION[J].Journal of Membrane Science,1997(1):65-79. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%