Abstracts Book - IMRC 2018

• SB1-O031
MWCNTs-POLYMER COMPOSITES CHARACTERIZATION THROUGH
SPECTROSCOPIES: FTIR AND RAMAN
Francisco Gabriel Granados Martínez 1 , José de Jesús Contreras Navarrete 1 , Jael Madaí Ambriz
Torres 1 , Carmen Judith Gutiérrez García 1 , Diana Litzajaya Garcia Ruiz 1 , Jaime Abraham Guzmán
Fuentes 1 , María Remedios Cisneros Magaña 2 , Leandro García González 3 , Luis Zamora Peredo 3 ,
Lada Domratcheva Lvova 1,4
1 Universidad Michoacana de San Nicolás de Hidalgo, Mechanical Engineering, Mexico.
2 Universidad Michoacana de San Nicolás de Hidalgo, Materials and Metallurgy Investigation
Institute, Mexico. 3 Universidad Veracruzana, Centro de Investigación en Micro y
Nanotecnología, Mexico. 4 Universidad Michoacana de San Nicolás de Hidalgo, Wood
Technology Engineering, Mexico.
Composites were obtained joining Multiwalled Carbon Nanotubes (MWCNTs)
with polymethyl methacrylate (PMMA), polycaprolactam (PA6) and polystyrene
(PS); the materials were observed through Scanning Electron Microscopy (SEM)
to evaluate their dispersion in the polymeric matrices; afterwards FTIR and
Raman spectroscopies were used to correlate the data to demonstrate that
matrix and reinforcement materials chemical interactions leads to a better
dispersion that enhance the composites properties. The MWCNTs were
synthesized by chemical vapor deposition, using benzene and ferrocene as
precursors. In order to functionalize the carbon nanotubes an oxidation process
were applied to the pristine nanostructures. The interaction among polymers
and MWCNTs (functionalized and non-functionalized) were evaluated. All the
composites were formed using 1.2% of functionalized and non-functionalized
multiwalled carbon nanotubes. The PMMA-MWCNTs and the PA6-MWCNTs
composites were obtained by a solution casting method using toluene and
hydrochloric acid solution, respectively, with mechanical stirring. The PS-
MWCNTs, using PS functionalized with hydroxyl groups, were mixed by
ultrasonic agitation in toluene solution. Visual composites observations showed
that composites formed with functionalized MWCNTs were better dispersed.
The composites with non-functionalized carbon nanotubes showed clusters
formations. The polymers surfaces observed by SEM confirmed that
functionalized MWCNTs have better incorporation in the matrix and those
samples with pristine MWCNTs present some clusters agglomerations.
Composites FTIR spectra were used to evaluate emerged and displaced signals
in order to explain interactions among MWCNTs and polymers, highlighting
changes in CH and OH functional groups. The Raman spectra of the PMMA-
MWCNTs and PA6-MWCNTs composites, with functionalized and non-