Stability of Fluorinated Double-Walled Carbon Nanotubes Produced by Different Fluorination Techniques
Source abstract
Abstract
Double-walled carbon nanotubes (DWCNTs) have been fluorinated using (1) gaseous F 2 at 200 °C, (2) a mixture of BrF 3 and Br 2 at room temperature, and (3) radio frequency CF 4 plasma. The stability of the resultant samples was examined by thermogravimetric analysis in an inert atmosphere and by comparing the X-ray photoelectron spectra of the pristine samples with those after heating in vacuum at either 70 °C for 10 h or 120 °C for 20 h. The DWCNTs fluorinated by F 2 showed the highest stability (the temperature of decomposition is around 396 °C), while the BrF 3 and plasma-fluorinated DWCNTs lose fluorine from 150 °C. Prolonged annealing of the fluorinated DWCNTs in vacuum at a temperature below 150 °C also resulted in the defluorination of the samples. Fluorine atoms leave the DWCNT surface together with carbon atoms leading to defects in the graphitic network. These defects are likely to be centers for later functionalization by oxygen-containing groups during DWCNT storage.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Carbon Nanotubes in Composites · Fiber-reinforced polymer composites · Graphene research and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Nikolaev Institute of Inorganic Chemistry, SB RAS, Novosibirsk, Russia
Centre Interuniversitaire de Recherche et d’Ingenierie des Materiaux, Universite Paul-Sabatier, France
CNRS, Institut Carnot Cirimat, F-31062 Toulouse, France
Institut des Materiaux Jean Rouxel, CNRS-Université de Nantes, France
CIC nanoGUNE Consolider, E-20018 San Sebastian, Spain
IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
Laboratoire Interdisciplinaire de Spectroscopie Electronique, Facultes Universitaires Notre Dame de la Paix, Belgium
Research Group of General Chemistry (ALGC), Vrije Universiteit Brussel − Free University of Brussels (VUB), Pleinlaan 2, B-1050, Brussels, Belgium
Institute of Solid State Physics, Dresden University of Technology, D-01062 Dresden, Germany
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