Chemical Modification of Carbon Nanofibers with Plasma of Acrylic Acid. Issue 7 (8th April 2013)

• Record Type: Journal Article
• Authors: Neira‐Velázquez, María G.; Hernández‐Hernández, Ernesto; Ramos‐deValle, Luis F.; Ávila‐Orta, Carlos A.; Perera‐Mercado, Yibran A.; Solís‐Rosales, Silvia G.; González‐Morones, Pablo; Ponce‐Pedraza, Arturo; Ávalos‐Borja, Miguel; Narro‐Céspedes, Rosa I.; Bartolo‐Pérez, Pascual
• Is Part Of: Plasma processes and polymers. Volume 10:Issue 7(2013:Jul.)
• Page Start: 627
• Page End: 633
• Publication Date: 2013-04-08
• Subjects: Plasma polymerization -- Periodicals; Plasma-enhanced chemical vapor deposition -- Periodicals; Plasma chemistry -- Periodicals
• DOI: 10.1002/ppap.201200122
• Languages: English
• ISSNs: 1612-8850

Abstract

Abstract : Hydrophilization of carbon nanofibers (CNFs) was achieved using plasma polymerization of acrylic acid. Transmission electron microscopy (TEM) and spectroscopy techniques were used to assess the structural changes and type of chemical groups grafted on CNFs during plasma treatment. Electron energy loss spectroscopy analysis showed a decrease of sp 2 bonds and an increase of sp 3 bonds coming from the thin film of polyacrylic acid deposited on CNFs during the plasma treatment. X‐ray photoelectron spectroscopy (XPS) corroborated that the sp 2 /sp 3 ratio of the treated CNFs decreased from 3.95 to 1.14. Also the presence of carbonyl and carboxyl groups were identified by XPS, whose presence promotes the hydrophilic character of CNFS and their dispersion in water. An amorphous structure on the surface of treated CNFs, which corresponds to the nanocoating of polyacrylic acid deposited by plasma, was observed by TEM. Abstract : Plasma treatment of CNFs using acrylic acid promotes their hydrophilic character. This new surface property of CNFs is a result of an increase of oxygen concentration at the surface of treated CNFs which has been demonstrated by XPS and EELS spectroscopy. A crosslinked nanocoating of polyacrilic acid was deposited on the surface on CNFs and part of this nanofilm was chemically bonded to the carbon atoms of the CNFs. The dispersion of plasma treated CNFs in water was stable.