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Experimental Investigations on Nanomechanical, Tribological, and Electrical Properties of TiO2/Polyimide-Based Nanocomposites Fabricated by SPS Technique

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Proceedings of 2023 the 6th International Conference on Mechanical Engineering and Applied Composite Materials (MEACM 2023)

Part of the book series: Mechanisms and Machine Science ((Mechan. Machine Science,volume 156))

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Abstract

In this study, TiO2 reinforced polyimide nanocomposites were successfully fabricated at varying TiO2 nanoparticles concentrations via spark plasma sintering process. The morphology of the samples were characterized by scanning electron microscopy (SEM). The nanomechanical, tribological, and dielectric/electrical properties of the sintered samples was examined using nanoindentation tester, tribometer, and LCR meter equipment, respectively. The SEM results indicate that the TiO2 nanofillers were equally diffused into polyimide matrix without agglomeration, hence the better interfacial bonding between the matrix and the nanofillers. Result shows that the hardness and elastic modulus of TiO2/polyimide composite sample with 6wt% TiO2 addition was improved by 179.3 and 76.4%, respectively, meanwhile, further addition of the nanoparticles above 6wt%, 314% improvement in hardness and 59.5% improvement in modulus was recorded compared to that of the pristine polyimide (PI). The reason for the decrease in modulus beyond 6wt% was the dosage contents of TiO2 particles and poor stress transfer within the nanocomposites with 8wt% TiO2 particles as elastic properties of composites depends on load transfer mechanism. In addition, the tribology and insulation performances of the virgin PI were also improved with the introduction of the TiO2 nanoparticles. Finally, the results indicate the cost-effective measure of fabricating PI nanocomposites and its potential for mechanical loadbearing, anti-wear, and insulation applications.

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Acknowledgements

The authors wish to thank the Center for Energy and Electric Power, and Center for Surface Engineering Research, Tshwane University of Technology (TUT) South Africa for their financial support during this study.

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Authors and Affiliations

  1. Faculty of Engineering and the Built Environment, Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria, P.M.B X680, South Africa

    Victor Ekene Ogbonna & Patricia Popoola

  2. Faculty of Engineering and the Built Environment, Center for Energy and Power, Electrical Engineering, Tshwane University of Technology, Pretoria, P.M.B X680, South Africa

    Victor Ekene Ogbonna & Olawale Popoola

Authors
  1. Victor Ekene Ogbonna
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  2. Patricia Popoola
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  3. Olawale Popoola
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Correspondence to Victor Ekene Ogbonna .

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Editors and Affiliations

  1. Department of Industrial Engineering, Tsinghua University, Beijing, China

    Xiaowei Yue

  2. Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, China

    Kunjie Yuan

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Ogbonna, V.E., Popoola, P., Popoola, O. (2024). Experimental Investigations on Nanomechanical, Tribological, and Electrical Properties of TiO2/Polyimide-Based Nanocomposites Fabricated by SPS Technique. In: Yue, X., Yuan, K. (eds) Proceedings of 2023 the 6th International Conference on Mechanical Engineering and Applied Composite Materials. MEACM 2023. Mechanisms and Machine Science, vol 156. Springer, Singapore. https://doi.org/10.1007/978-981-97-1678-4_21

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  • DOI: https://doi.org/10.1007/978-981-97-1678-4_21

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