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Functionalization of Multi-Wall Carbon Nanotubes in Chemical Solution of H2SO4/HNO3 and its Dispersion in Different Media
- Source :
- Materials Science Forum. 882:103-107
- Publication Year :
- 2017
- Publisher :
- Trans Tech Publications, Ltd., 2017.
-
Abstract
- The usage of multi-wall carbon nanotubes (MWCNTs) as reinforcement has been limited due to difficulties associated with dispersion of MWCNTs during the processing and poor adhesion between MWCNTs and matrix. In this paper, the effect of chemical functionalization with strong acid on the dispersion of MWCNTs were studied. The functionalization of MWCNTs were performed in chemical solution of sulphuric acid (H2SO4) and nitric acid (HNO3) with ratio of 3:1 and prepared at 80°C for 4 hours. The pristine MWCNTs (PMWCNTs) and acid treated MWCNTs (AMWCNTs) were analyzed using TEM, XRD, FTIR and Pycnometer density. The effect of dispersion of PMWCNTs and AMWCNTs was studied in three different matrices which are in aqueous media (distilled water), metal matrix and polymer matrix. The XRD results determined that the impurities in pristine MWCNTs such as NiZn3 have been removed after the purification process. The presence of carboxylic acid (-COOH) and hydroxyl (-OH) functional groups were determined using FT-IR. Based on the dispersion analysis in aqueous media, PMWCNTs were poor in suspension stability. While, the TEM images showed less agglomeration of the AMWCNTs compared to PMWCNTs and obtained a uniform dispersion in metal matrix (Cu) and polymer (epoxy) matrix composites.
- Subjects :
- Materials science
Carboxylic acid
02 engineering and technology
Carbon nanotube
law.invention
chemistry.chemical_compound
0203 mechanical engineering
Nitric acid
law
General Materials Science
Fourier transform infrared spectroscopy
Composite material
chemistry.chemical_classification
Mechanical Engineering
Polymer
Epoxy
021001 nanoscience & nanotechnology
Condensed Matter Physics
020303 mechanical engineering & transports
chemistry
Chemical engineering
Mechanics of Materials
visual_art
visual_art.visual_art_medium
Surface modification
0210 nano-technology
Dispersion (chemistry)
Subjects
Details
- ISSN :
- 16629752
- Volume :
- 882
- Database :
- OpenAIRE
- Journal :
- Materials Science Forum
- Accession number :
- edsair.doi...........b7b6550a3c874cb17c1637ff30d0a629
- Full Text :
- https://doi.org/10.4028/www.scientific.net/msf.882.103