Robust carbon nanotube membranes directly grown on Hastelloy substrates and their potential application for membrane distillation
Robust carbon nanotube membranes directly grown on Hastelloy substrates and their potential application for membrane distillation
复制标题
DOI：
10.1016/j.carbon.2016.05.016
复制
发表时间：
2016-09-01
期刊：
影响因子：
10.9
通讯作者：
Dastgheib, Seyed A.
中科院分区：
文献类型：
--
作者：
Ashraf, Ali;Salih, Hafiz;Dastgheib, Seyed A.
采用可扩展的化学气相沉积方法，将碳纳米管（CNT）直接生长在具有微米尺寸孔的镍合金（哈氏合金）网格上，开发了一类新型坚固的碳纳米管（CNT）膜。开发的膜具有致密的碳纳米管纠缠网络，孔径为50-500 nm，并且具有超疏水性。这些碳纳米管膜可以抵抗高达500摄氏度的空气氧化和浓HCl或NaCl溶液中的化学腐蚀。粘附和超声测试表明，开发的碳纳米管膜具有抗分层性，并且显示出生长的碳纳米管与合金衬底的高界面键合。通过在10,000 mg/L NaCl溶液中进行膜蒸馏试验，探讨了所开发的碳纳米管-哈氏合金膜在分离中的潜在应用。制备的膜具有与碳布基纸膜相近的脱盐性能。这些坚固的碳纳米管膜是可重复使用的，由于它们的超疏水性，预计不太容易受到污染。此外，如果被污染，它们可以通过在空气中加热或使用酸洗再生。(C) 2016 Elsevier Ltd.版权所有。
A new class of robust carbon nanotube (CNT) membranes is developed using a scalable chemical vapor deposition method by direct growth of the CNT on a nickel alloy (Hastelloy) mesh with micrometer-sized openings. The developed membranes have a dense, entangled network of CNT with 50-500 nm pore openings and are superhydrophobic. These CNT membranes are resistant to air oxidation up to similar to 500 degrees C and chemical corrosion in concentrated HCl or NaCl solutions. Adhesion and ultrasonication tests suggest that the developed CNT membranes are resistant to delamination and demonstrate a high interfacial bonding of the grown CNT with the alloy substrate. Potential application of the developed CNT-Hastelloy membranes for separation is explored by conducting membrane distillation tests using a 10,000 mg/L NaCl solution. The developed membranes show similar salt rejection performance compared with a carbon bucky paper membrane. These robust carbon nanotube membranes are reusable and expected to be less susceptible to fouling because of their superhydrophobic properties. Furthermore, if fouled, they can be regenerated by heating in air or using an acid wash. (C) 2016 Elsevier Ltd. All rights reserved.