Abstract
Carbon nanotubes (CNTs) functionalization was carried out with radio frequency plasma in different working gas Ar/O2 and Ar/O2/N2 at different plasma powers to synthesize epoxy nanocomposites. After the CNT's had been treated, the Fourier transform infrared (FTIR) spectroscopy showed an additional peak at 1,740 cm−1, attributed to carboxylic groups, corroborating the X‐ray photoelectron spectroscopy that shows attachment of oxygen groups, which indicates CNTs' functionalization. Raman shows an increase in the ID/IG ratio, attributed to an increased number of defects, in agreement with transmission electron microscope images that show a nanocoating on CNTs' surfaces. Functionalization carried out with low power plasma makes also some C‐N bonds possible, preserving the aromatic carbons of the CNTs' structure. Nanocomposites showed better dispersion and distribution for samples with CNTs treated by Ar/O2/N2 plasma. Furthermore, there was a decrease in Tg when compared with neat epoxy, especially for samples with more nitrogen atoms attached to the CNTs. Mechanical properties presented an improvement, which is specially related to a better phase interaction led by the nitrogen presence on the CNTs' surface. POLYM. COMPOS., 40:E1162–E1171, 2019. © 2018 Society of Plastics Engineers
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
