Mechanical and Electrical Properties of Epoxy Composites Modified by Functionalized Multiwalled Carbon Nanotubes
Open Access
- 16 June 2021
- Vol. 14 (12), 3325
- https://doi.org/10.3390/ma14123325
Abstract
This paper investigates the effect of multiwalled carbon nanotubes on the mechanical and electrical properties of epoxy resins and epoxy composites. The research concerns multiwalled carbon nanotubes obtained by catalytic chemical vapor deposition, subjected to purification processes and covalent functionalization by depositing functional groups on their surfaces. The study included the analysis of the change in DC resistivity, tensile strength, strain, and Young’s modulus with the addition of carbon nanotubes in the range of 0 to 2.5 wt.%. The effect of agents intended to increase the affinity of the nanomaterial to the polymer on the aforementioned properties was also investigated. The addition of functionalized multiwalled carbon nanotubes allowed us to obtain electrically conductive materials. For all materials, the percolation threshold was obtained with 1% addition of multiwalled carbon nanotubes, and filling the polymer with a higher content of carbon nanotubes increased its conductivity. The use of carbon nanotubes as polymer reinforcement allows higher values of tensile strength and a higher strain percentage to be achieved. In contrast, Young’s modulus values did not increase significantly, and higher nanofiller percentages resulted in a drastic decrease in the values of the abovementioned properties.Keywords
This publication has 38 references indexed in Scilit:
- Significance of Carbon Nanotube in Flame-Retardant Polymer/CNT Composite: A ReviewPolymer-Plastics Technology and Engineering, 2016
- Polymer Nanocomposites—A Comparison between Carbon Nanotubes, Graphene, and Clay as NanofillersMaterials, 2016
- Improving the fracture toughness and the strength of epoxy using nanomaterials – a review of the current statusNanoscale, 2015
- A review on carbon nanotubes and graphene as fillers in reinforced polymer nanocompositesJournal of Industrial and Engineering Chemistry, 2014
- Surface modifications for the effective dispersion of carbon nanotubes in solvents and polymersCarbon, 2012
- Dispersion and functionalization of carbon nanotubes for polymer-based nanocomposites: A reviewComposites Part A: Applied Science and Manufacturing, 2010
- Carbon nanotube–polymer composites: Chemistry, processing, mechanical and electrical propertiesProgress in Polymer Science, 2010
- The biocompatibility of carbon nanotubesCarbon, 2005
- Dispersion and alignment of carbon nanotubes in polymer matrix: A reviewMaterials Science and Engineering: R: Reports, 2005
- Carbon nanotube polymer compositesCurrent Opinion in Solid State and Materials Science, 2004