Carbon nanotube functionalized with dodecylamine for the effective dispersion in solvents

Author(s)

Ferreira, Filipe Vargas ; Francisco, Wesley ; Canuto de Menezes, Beatriz Rossi ; Cividanes, Luciana de Simone ; Coutinho, Aparecido dos Reis ; Thim, Gilmar Patrocinio

• Document type: Journal article
• Source: Applied Surface Science; v. 357, p. 6-pg., 2015-12-01.

Abstract

In this work, it was performed a dispersion study of carbon nanotubes (CNTs) functionalized with carboxylic and alkane groups in various solvents. CNT was functionalized using H2SO4/HNO3 and subsequently functionalized by dodecylamine (DDA). Fourier transform infrared, X-ray photoelectron spectroscopy, thermogravimetric analysis and transmission electron microscopy were used to characterize the CNTs at each step of the surface modification. The dispersion state of CNTs in the solvents was evaluated by Optical microscopy and visual observations. The evaluation of the solvent influence itself was also made. Results confirmed the presence of oxygen-containing and alkane groups on CNTs surfaces. The dispersion stability was strongly dependent on the solvent and carbon nanotubes surface interactions, which can vary with the chemical nature of the solvent. The study of the surface modifications and the degree of carbon nanotubes dispersion is relevant to enhance the full understanding of its applications. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/20218-0 - Nanocomposites of CNT/HDPE: effect of alcanes functionalization
• Grantee: Filipe Vargas Ferreira
• Support Opportunities: Scholarships in Brazil - Master