Surface Modification of Carbon Nanotubes with Combined UV and Ozone Treatments

Recent advances in the development of reliable methods for the chemical functionalization of the carbon nanotubes (CNTs) provide an additional momentum in extending the applications scope of CNTs. A single-walled CNTs (SWCNTs) surface was modified using two methods; ultraviolet (UV) with benzophenone and UV with ozonolysis treatments by varying time length. Both methods resulted in carboxylic acid group functionalization on the surface of CNTs. The thermal properties of the surface modified SWCNTs have been characterized by TGA and the structural morphology of surface-modified single-walled CNT have been examined by field emission scanning electron microscope and x-ray diffraction. The surface functionalization of SWCNTs is important for dispersion and solubilization as well as to obtain CNT surface with chemical functionalities. Therefore, Fourier transform infrared spectroscopy, Raman spectra, and elemental analysis were performed to evaluate the changes in chemical structure and surface functional groups of SWCNTs treated under UV with benzophenone and UV with ozonloysis treatments.

[1]  J. Mays,et al.  Polymer-grafted multiwalled carbon nanotubes through surface-initiated polymerization. , 2004, Angewandte Chemie.

[2]  S. Iijima.  Helical microtubules of graphitic carbon , 1991, Nature.

[3]  Jang‐Kyo Kim,et al.  Surface functionalities of multi-wall carbon nanotubes after UV/Ozone and TETA treatments , 2006 .

[4]  Richard E. Smalley,et al.  Surface defect site density on single walled carbon nanotubes by titration , 2000 .

[5]  J. Tour,et al.  Covalent chemistry of single-wall carbon nanotubes , 2002 .

[6]  V. Basiuk,et al.  Direct Solvent-Free Amination of Closed-Cap Carbon Nanotubes: A Link to Fullerene Chemistry , 2004 .

[7]  A. Dalton,et al.  Optical spectroscopy of isolated and aggregate hexabenzocoronene derivatives: A study of self-assembling molecular nanowires , 2003 .

[8]  Hui Hu,et al.  End-group and defect analysis of soluble single-walled carbon nanotubes , 2001 .

[9]  Tanja Neumann,et al.  Elements Of X Ray Diffraction , 2016 .

[10]  A. Maiti,et al.  Structural flexibility of carbon nanotubes , 1996 .

[11]  M. Itkis,et al.  Determination of the acidic sites of purified single-walled carbon nanotubes by acid–base titration , 2001 .

[12]  E. Sacher,et al.  Controlled chemical functionalization of multiwalled carbon nanotubes by kiloelectronvolt argon ion treatment and air exposure. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[13]  Karen Lozano,et al.  Reinforcing Epoxy Polymer Composites Through Covalent Integration of Functionalized Nanotubes , 2004 .

[14]  M. Itkis,et al.  Chemistry of single-walled carbon nanotubes. , 2002, Accounts of chemical research.

[15]  D. Colbert,et al.  Dissolution of Full-Length Single-Walled Carbon Nanotubes , 2001 .

[16]  Hayashi,et al.  Interlayer spacings in carbon nanotubes. , 1993, Physical review. B, Condensed matter.

[17]  Eklund,et al.  Solution properties of single-walled carbon nanotubes , 1998, Science.

[18]  M. Strano,et al.  Using Raman Spectroscopy to Elucidate the Aggregation State of Single-Walled Carbon Nanotubes , 2004 .

[19]  Linda S. Schadler,et al.  Surface modification of multiwalled carbon nanotubes: Toward the tailoring of the interface in polymer composites , 2003 .

[20]  P. Lambin,et al.  Structure of carbon nanotubes probed by local and global probes , 2002 .

[21]  Maurizio Prato,et al.  Molecular design of strong single-wall carbon nanotube/polyelectrolyte multilayer composites , 2002, Nature materials.

[22]  Quan Qing,et al.  Effect of Chemical Oxidation on the Structure of Single-Walled Carbon Nanotubes , 2003 .

[23]  J. Robertson,et al.  Interpretation of Raman spectra of disordered and amorphous carbon , 2000 .

[24]  Hiroaki Takahashi,et al.  Raman studies of carbon nanotubes , 1993 .