Zhang Lei, Zhao Bin, Jiang Chuan, Yang Junhe, Zheng Guangping
School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
Nanoscale Res Lett. 2015 Dec;10(1):970. doi: 10.1186/s11671-015-0970-8. Epub 2015 Jun 19.
We report a simple and effective method for the preparation of high-density and aligned carbon nanotube (CNT) membranes. The CNT arrays were prepared by water-assisted chemical vapor deposition (CVD) and were subsequently pushed over and stacked into dense membranes by mechanical rolling. It was demonstrated that various gases and liquids, including H2, He, N2, O2, Ar, water, ethanol, hexane, and kerosene, could effectively pass through the aligned carbon nanotube membranes. The membranes exhibited different selections on different gases, indicating that there was a separation potential for the gas mixtures. The selectivities (H2 relative to other gases) of H2/He, H2/N2, H2/O2, and H2/Ar were found to be lower than that of the ideal Knudsen model. For pure water, the permeability was measured to be 3.23 ± 0.05 ml·min(-1)·cm(-2) at 1 atm, indicating that the CNT membranes were promising for applications in liquid filtration and separation.
我们报道了一种制备高密度且排列整齐的碳纳米管（CNT）膜的简单有效方法。碳纳米管阵列通过水辅助化学气相沉积（CVD）制备，随后通过机械轧制将其推倒并堆叠成致密膜。结果表明，包括H2、He、N2、O2、Ar、水、乙醇、己烷和煤油在内的各种气体和液体都能有效通过排列整齐的碳纳米管膜。这些膜对不同气体表现出不同的选择性，表明对气体混合物具有分离潜力。发现H2/He、H2/N2、H2/O2和H2/Ar的选择性（H2相对于其他气体）低于理想的克努森模型。对于纯水，在1个大气压下测得的渗透率为3.23±0.05 ml·min(-1)·cm(-2)，表明碳纳米管膜在液体过滤和分离应用方面具有前景。
