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具有小于1.27纳米孔径的大规模聚合物碳纳米管膜。

Large-scale polymeric carbon nanotube membranes with sub-1.27-nm pores.

作者信息

McGinnis Robert L, Reimund Kevin, Ren Jian, Xia Lingling, Chowdhury Maqsud R, Sun Xuanhao, Abril Maritza, Moon Joshua D, Merrick Melanie M, Park Jaesung, Stevens Kevin A, McCutcheon Jeffrey R, Freeman Benny D

机构信息

Mattershift, New York, NY 10017, USA.

University of Connecticut, Storrs, CT 06269, USA.

出版信息

Sci Adv. 2018 Mar 9;4(3):e1700938. doi: 10.1126/sciadv.1700938. eCollection 2018 Mar.

DOI:10.1126/sciadv.1700938
PMID:29536038
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5844709/
Abstract

We report the first characterization study of commercial prototype carbon nanotube (CNT) membranes consisting of sub-1.27-nm-diameter CNTs traversing a large-area nonporous polysulfone film. The membranes show rejection of NaCl and MgSO at higher ionic strengths than have previously been reported in CNT membranes, and specific size selectivity for analytes with diameters below 1.24 nm. The CNTs used in the membranes were arc discharge nanotubes with inner diameters of 0.67 to 1.27 nm. Water flow through the membranes was 1000 times higher than predicted by Hagen-Poiseuille flow, in agreement with previous CNT membrane studies. Ideal gas selectivity was found to deviate significantly from that predicted by both viscous and Knudsen flow, suggesting that surface diffusion effects may begin to dominate gas selectivity at this size scale.

摘要

我们报告了对商业原型碳纳米管（CNT）膜的首次表征研究，该膜由直径小于1.27纳米的碳纳米管穿过大面积无孔聚砜薄膜组成。这些膜在比之前碳纳米管膜报道的更高离子强度下对氯化钠和硫酸镁具有截留作用，并且对直径小于1.24纳米的分析物具有特定的尺寸选择性。膜中使用的碳纳米管是内径为0.67至1.27纳米的电弧放电纳米管。通过膜的水流量比哈根 - 泊肃叶流预测的高1000倍，这与之前的碳纳米管膜研究一致。发现理想气体选择性与粘性流和克努森流预测的结果有显著偏差，这表明在这个尺寸尺度下表面扩散效应可能开始主导气体选择性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c61f/5844709/d7c5f2ffbcb3/1700938-F3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c61f/5844709/256218be27f8/1700938-F1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c61f/5844709/39826c18a176/1700938-F2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c61f/5844709/d7c5f2ffbcb3/1700938-F3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c61f/5844709/256218be27f8/1700938-F1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c61f/5844709/39826c18a176/1700938-F2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c61f/5844709/d7c5f2ffbcb3/1700938-F3.jpg

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