Enhanced nanomechanical properties of polymer nanocomposites reinforced with surface engineered carbon nanotubes using barium titanate

Uyor, U. O.; Popoola, A. P. I.; Popoola, Olawale

doi:10.1080/25740881.2021.1995420

Cited by 3 publications

(2 citation statements)

References 54 publications

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“…The surface functionalization of the CNTs and BT were respectively done using PDA and GPTMS. 14 The nanoparticles were dispersed and ultrasonicated at 80 o C for 4 h in different beakers containing distilled water (for CNTs) and xylene (for BT). The PDA was introduced in the suspension of CNTs with dropwise addition of ammonia solution under ultrasonication.…”

Section: Nanoparticles Functionalization and Nanocomposites Fabricationmentioning

confidence: 99%

Enhanced mechanical and dynamic mechanical properties of polymer nanocomposites containing carbon nanotubes decorated with barium titanate

Uyor

Popoola

2022

Polymers and Polymer Composites

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This study presents functionalized carbon nanotubes (CNTs) decorated with functionalized barium titanate (BT) (denoted as BT@CNTs) via hydrothermal and self-assembly methods to improve dispersion in polypropylene (PP) matrix with enhanced thermal, mechanical, and thermomechanical properties. The CNTs, BT, and BT@CNTs with the addition of polypropylene maleic anhydride (PPMA) compatibilizer were used in the fabrication of the PP based nanocomposites for this study via solution mixing and melt compounding. FTIR, TEM, and SEM analyses, respectively revealed that the nanoparticles were successfully functionalized, CNTs decorated with BT, and well dispersion in the PP matrix. PP/BT@CNTs-based nanocomposite showed optimal tensile strength, modulus, heat deflection, and thermal stability of about 16.8%, 26.5%, 20.1%, and 30oC higher than that obtained for the pure PP. These properties were also respectively 10.6%, 17.6%, 19.0%, and 5.0oC higher than PP/3CNTs nanocomposite when compared to PP/3BT@CNTs. The PP/BT@CNTs based nanocomposites also revealed enhanced dynamic mechanical properties. The better performance in the measured properties of PP/BT@CNTs compared to pure PP and PP/CNTs were attributed to their uniform microstructures, effective interlocking of the PP matrix due to the presence of BT on CNTs surfaces.

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Section: Nanoparticles Functionalization and Nanocomposites Fabricationmentioning

confidence: 99%

Enhanced mechanical and dynamic mechanical properties of polymer nanocomposites containing carbon nanotubes decorated with barium titanate

Uyor

Popoola

2022

Polymers and Polymer Composites

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“…Plastic deformation can occur in either ways while elastic deformation exhibits sink-in only. 46,47 During the loading regime in nano indentation, elastic and plastic deformation occurred; but during unloading regime, only elastic deformation occurred. 48 So, a plot of ratio of final penetration depth (Hf) and maximum penetration depth (Hm) i.e.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Mechanical and thermal behaviors of Ti36-Al16-V16-Fe16-Cr16 high entropy alloys fabricated by spark plasma sintering: An advanced material for high temperature/strength applications

Ujah

Popoola

Uyor

2022

Journal of Composite Materials

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Conventional superalloys possess high strength, high oxidation resistance and high creep resistance. Nonetheless, some lose strength at elevated temperatures, while others suffer high temperature oxidation and creep. This work was aimed at developing high entropy alloy (HEA) of Ti36-Al16-V16-Fe16-Cr16 at near equi molar configuration using spark plasma sintering technique which would be able to address the challenges of conventional superalloys. The powders were mixed with Turbular mixer at 69 rpm for 10 h. The sintering was carried out with the same sintering pressure of 40 MPa, time of 10 min, heating rate of 100°C/mins on all the samples. Only the sintering temperature was varied. The temperatures used included 700°C, 800°C, 900°C, 1000°C and 1100°C, respectively. The powders and sintered samples were characterized with Scanning electron microscopy connected to Energy Dispersive Spectroscopy and X-ray diffractometer. The mechanical properties were tested with Nano indenter using ASTM D785 standard; while the thermal stability was investigated with thermogravimetric analyzer. Results showed that HEA sintered at 1000°C possessed the best nanomechanical, thermal and microstructural properties while that sintered at 700°C had the weakest properties. The best developed alloy had an improved elastic modulus of 671.17 ± 50 GPa and 930.12 ± 38 GPa at darker flakey phase and white phase, respectively. It had creep resistance of 1.82%, densification of 98.96% and porosity of 1.04%. It was concluded that the developed alloy can perform much better than most superalloys in high temperature and high strength and applications.

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Mechanical and Oxidation Characteristics of Ti20-Al16-V16-Fe16- Ni16-Cr16 High-Entropy Alloy Developed via Spark Plasma Sintering for High-Temperature/Strength Applications

Ujah

Popoola

et al. 2022

J. of Materi Eng and Perform

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Enhanced nanomechanical properties of polymer nanocomposites reinforced with surface engineered carbon nanotubes using barium titanate

Cited by 3 publications

References 54 publications

Enhanced mechanical and dynamic mechanical properties of polymer nanocomposites containing carbon nanotubes decorated with barium titanate

Enhanced mechanical and dynamic mechanical properties of polymer nanocomposites containing carbon nanotubes decorated with barium titanate

Mechanical and thermal behaviors of Ti36-Al16-V16-Fe16-Cr16 high entropy alloys fabricated by spark plasma sintering: An advanced material for high temperature/strength applications

Mechanical and Oxidation Characteristics of Ti20-Al16-V16-Fe16- Ni16-Cr16 High-Entropy Alloy Developed via Spark Plasma Sintering for High-Temperature/Strength Applications

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