4-Substituted Benzoic Acids Functionalized Multi-Walled Carbon Nanotubes in Mild Polyphosphoric Acid/Phosphorous Pentoxide

Abstract:

Pristine multi-walled carbon nanotubes (P-MWNTs) were functionalized with 4-substituted benzoic acid via ‘‘direct’’ Friedel-Crafts acylation in mild reaction medium of polyphosphoric acid (PPA)/phosphorous pentoxide (P2O5). Raman spectroscopy, thermogravimetric analysis, transmission electron microscopy were applied in this paper to demonstrate that multi-walled carbon nanotubes inherently have functional groups on their surfaces as a result of the reaction. The overall evidence indicates that the 4-substituted benzoic acid functionalization of carbon nanotube can be achieved without oxidation as pre-treatment. Thus, aryl carbonyl moieties with different length of 4-substituted alkyl acyl amine functionalized MWNTs（F-MWNTs） can be synthesized simply, without disrupting the primary structures of the nanotubes.

• Periodical: Advanced Materials Research (Volumes 217-218)
• Pages: 768-773
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.217-218.768
• Online since: March 2011
• Authors: Hai Hui Liu, Ning Wang, Li Chen Hou, Wei Wei Peng, Yan Mei Jin, Xing Xiang Zhang
• Keywords: Carbon Nanotube (CN), Functionalization, Phosphorous Pentoxide, Polyphosphoric Acid (PPA)

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