Author(s): Steffen, Teresa Tromm ; Fontana, Luis César ; Hammer, Peter [UNESP] ; Becker, Daniela
Date: 2019
Persistent ID: http://hdl.handle.net/11449/190417
Origin: Oasisbr
Subject(s): Carbon nanotubes; Functionalization; Plasma; Water cleaning; Carbon nanotubes; Carbon nanotubes; Functionalization; Functionalization; Plasma; Plasma; Water cleaning; Water cleaning
Made available in DSpace on 2019-10-06T17:12:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-10-15
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Carbon nanotubes (CNT) were functionalized by radio-frequency plasma using maleic anhydride (MA) as a source of functional groups. The MA insertion was performed in the solid form through a mixture with CNT conducted under two different methods: in a planetary mill; and manually, using mortar and pestle assistance. The premix influence on CNT functionalization and the functionalization itself were evaluated using Fourier Transform Infrared (FTIR), Raman Spectroscopy, Transmission Electronic Microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The results indicate CNT plasma functionalization by the carboxyl groups provided by the opened MA ring. Neither the mixture methods nor the plasma process affected the integrity of the CNT, maintaining their initial morphology. Structural analyses indicate increased presence of O-C=O groups attached to the CNT's surface after functionalization operation and subsequent moisture removal from the nanoparticles. Such effect was more pronounced for samples with a higher amount of O-C=O groups (>3 at.%) premixed in the mortar, suggesting a potential use of the functionalized CNT as an agent for wastewater cleaning.
Center for Technological Sciences UDESC
São Paulo State University (UNESP) Institute of Chemistry
São Paulo State University (UNESP) Institute of Chemistry
CAPES: 001
CNPq: 445242/2014-0
