Abstract
Recent research has shown that carbon nanotube (CNT) acts as a model reinforcement material for fabricating nanocomposites. The addition of CNT as a reinforcing material into the matrix improves the mechanical, thermal, tribological, and electrical properties. In this research paper multiwalled carbon nanotube (MWCNT), with different weight percentage (5%, 10%, and 15%), was reinforced into manganese dioxide (MnO2) matrix using solution method. The different weight % of MWCNT/MnO2nanocomposite powders was compacted and then sintered. The phase analysis, morphology, and chemical composition of the nanocomposites were examined by X-ray diffractometer, Field Emission Scanning Electron Microscope (FESEM), and Energy Dispersive X-Ray (EDX), respectively. The XRD analysis indicates the formation of MWCNT/MnO2nanocomposites. The FESEM surface morphology analysis shows that MnO2nanotube is densely grown on the surface of MWCNT. Further, microhardness of MWCNT/MnO2nanocomposite was measured and it was found that 10 wt% has higher microhardness in comparison to 5 and 15 wt%. The microhardness of the composites is influenced by mass density, nanotube weight fraction, arrangement of tubes, and dispersion of MWCNT in H2SO4(aq) solution.
Highlights
In the last decade, nanoscience and nanotechnology have invited much interest of the researchers and industrial practitioners as enhancement in the property of the composite is noticed as the atomic dimension of reinforced material reduces to nanometer scale.The need for advanced composite materials having enhanced functional properties and performance characteristics is ever increasing in industrial sectors
In addition to the (002) and (100) diffraction peak of multiwalled carbon nanotube (MWCNT), other diffraction peaks can be indexed to the tetragonal α-MnO2 single-crystal structure and the structure of MnO2 having space group: I4/m (87) with lattice constants of a = 0.9815 nm, b = 0.9815 nm, and c = 0.2847 nm used for sample refinement
5, 10, and 15 wt% MWCNT/MnO2 nanocomposites were successfully synthesized by using simple solution method
Summary
Nanoscience and nanotechnology have invited much interest of the researchers and industrial practitioners as enhancement in the property of the composite is noticed as the atomic dimension of reinforced material reduces to nanometer scale. The need for advanced composite materials having enhanced functional properties and performance characteristics is ever increasing in industrial sectors. Theoretical and experimental studies have shown that CNT exhibits extremely high tensile modulus ∼1 TPa and strength ∼150 GPa. CNT exhibits high flexibility, low density ∼1.3– 1.4 g/cm, and large aspect ratios ∼1000 [1]. Experimental studies have shown that MWCNT synthesized by chemical vapor deposition (CVD) exhibits Young’s modulus of about 0.45 TPa and tensile strength of about 3.6 GPa during scanning electron microscope tension test [2]. The superior mechanical properties of CNT are one of the primary reasons for considering the use of CNT as a filler material for fabricating metal, ceramic, or polymer matrix nanocomposite [3]
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