Full range of wettability through surface modification of single-wall carbon nanotubes by photo-initiated chemical vapour deposition

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作   者：

Hosseininasab, Seyedehsan;  Faucheux, Nathalie;  Soucy, Gervais;  Tavares, Jason R.; 

作者机构：

Dept Chem & Biotechnol Engn;  Dept Chem Engn;  PQ J1K 2R1;  PQ H3T 1J4;  Canada;  Sherbrooke;  Univ Sherbrooke;  Montreal;  Polytech Montreal; 

关键词：

PICVD;  Surface modification;  Oxygen functional group;  Superhydrophobic;  Superhydrophilic; 

期刊名称：

Chemical engineering journal

i s s n：

1385-8947

年卷期：

2017 年 325 卷

页   码：

101-113

页   码：

摘   要：

Single-wall carbon nanotubes (SWCNTs) have various remarkable properties, which make them a promising candidate for many applications. However, their inherent hydrophobicity has limited their commercial use in optical, biological, and electrical applications. Photo-initiated chemical vapour deposition (PICVD) using syngas is proposed as a novel, affordable, and versatile method to tailor SWCNT wettability through the addition of oxygen-containing functional groups. Following PICVD surface treatment, X-ray photoelectron spectroscopy, water contact angle measurements (CA), thermogravimetric analysis, Raman spectroscopy and transmission electron microscopy confirm controlled oxygenation of the SWCNT surface. Indeed, this novel approach allows to reproducibly make SWCNTs having surfaces properties ranging from superhydrophilic (CA < 5) to superhydrophobic (CA > 150), including any intermediate values, by simply varying operational parameters such as molar ratio of the syngas precursor, photo-polymerization time and reactor pressure (about normal conditions). (C) 2017 Elsevier B.V. All rights reserved.