Dr. Amit K. Naskar Profile

Dr. Amit K. Naskar

at Oak Ridge National Lab

SPIE Involvement:

Author

Publications (9)

Proceedings Article | 9 May 2024 Presentation + Paper

Multiscale modeling-enabled design of multifunctional composites

Sumit Gupta, Tanvir Sohail, Amit Naskar, Christopher Bowland

Proceedings Volume 12950, 129500N (2024) https://doi.org/10.1117/12.3011931

KEYWORDS: Composites, Matrices, Sensors, Electrical properties, Piezoelectric materials, Materials properties, Thin films, Piezoresistivity, Industry, Ferroelectric materials

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Proceedings Article | 9 May 2024 Presentation + Paper

Enhancing electromechanical properties of a lignin-based multifunctional composite through chemical reactive blending with functionalized carbon nanotubes

Nihal Kanbargi, Sargun Singh Rohewal, Yawei Gao, Logan Kearney, Jan Michael Carrillo, Christopher Bowland, Amit Naskar, Sumit Gupta

Proceedings Volume 12950, 1295005 (2024) https://doi.org/10.1117/12.3012176

KEYWORDS: Electrical conductivity, Composites, Polymers, Nanocomposites, Matrices, Carbon nanotubes, Resistance, Nanotubes, Electrical properties, Nanoparticles

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Proceedings Article | 9 May 2024 Presentation + Paper

A recyclable self-healing composite with advanced sensing property

Sargun Singh Rohewal, Amit Naskar, Christopher Bowland, Sumit Gupta

Proceedings Volume 12950, 1295002 (2024) https://doi.org/10.1117/12.3009914

KEYWORDS: Composites, Sensors, Polymers, Matrices, Materials properties, Resistance, Epoxies, FT-IR spectroscopy, Piezoresistivity, Equipment

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Polymer-based composites frequently encounter damage, often lurking beneath the surface and proving challenges to their early detection and repair. While material-based sensors show promise for encoding self-sensing properties within these composites, their in situ healing and reprocessability remain significant challenges. Therefore, the overarching goal of this study is the creation of a reprocessable polymeric composite encoded with self-healing attributes and the ability to autonomously sense damage.

At the core of this innovation are vitrimers, a polymeric material characterized by a covalently adaptive dynamic network responsive to external factors such as heat. They combine thermoset-like resilience with thermoplastic-like flowability on demand under external stimuli. We nanoengineer a polyester-based vitrimeric polymer by incorporating piezoresistive carbon nanotubes (CNTs) as reinforcing elements that not only enhance its mechanical strength but also create a percolation network within the composite, thereby enabling piezoresistive self-sensing properties, all the while preserving the intrinsic self-healing capabilities offered by the vitrimeric matrix.

The fabrication process of the composite involves a solvent-free in situ polymerization method that combines epoxy and anhydride-containing monomers with ~ 0.1 wt.% of CNTs. Once it was established that the introduction of CNTs into the polymeric matrix did not compromise the mechanical properties of the composite, their strain-sensing properties were characterized by applying cyclic loading while measuring their electrical resistance. Strikingly, CNT-enhanced vitrimer composite consistently retains its mechanical and sensing properties through repeated cycles of reshaping and reprocessing, underscoring its potential as a robust distributed strain sensor. This polyester-based vitrimeric composite is also easily recyclable without harsh chemical treatments. Preliminary findings from this study conclusively demonstrate that the bulk composite boasts both self-sensing capabilities and in situ detect healing properties, charting a promising course towards the development of a mechanically resilient multifunctional composite that seamlessly integrates selfsensing and healing capabilities.

Proceedings Article | 18 April 2023 Presentation + Paper

A versatile fiber coating process for efficient fabrication of multifunctional composites

Sumit Gupta, Arijit Mahapatra, Polyxeni Angelopoulou, Logan Kearney, Zeyang Yu, Amit Naskar, Christopher Bowland

Proceedings Volume 12487, 124870I (2023) https://doi.org/10.1117/12.2658606

KEYWORDS: Composites, Carbon fibers, Fiber coatings, Ferroelectric materials, Sensors

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Proceedings Article | 18 April 2022 Presentation + Paper

Multifunctional fiber-reinforced composites for passive sensing and energy harvesting with enhanced mechanical performance

Sumit Gupta, Amit Naskar, Christopher Bowland

Proceedings Volume 12047, 120470F (2022) https://doi.org/10.1117/12.2612435

KEYWORDS: Composites, Passive remote sensing, Energy harvesting, Sensors, Ferroelectric materials, Epoxies, Scanning electron microscopy, Image processing, Resistance, Fiber coatings

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Proceedings Article | 22 March 2021 Presentation + Paper

Passive sensing of a microparticle modified hybrid, fiber-reinforced composite

Christopher Bowland, Sumit Gupta, Susan Rankin, Amit Naskar

Proceedings Volume 11592, 115920B (2021) https://doi.org/10.1117/12.2582746

KEYWORDS: Nanoparticles, Mechanical sensors, Deposition processes, Ceramics, Composites, Passive remote sensing, Carbon, Thin film coatings

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Proceedings Article | 1 April 2019 Paper

Enhanced piezoresistive sensing of fiber-reinforced composites via embedded nanoparticles

Christopher Bowland, Eric Burgeson, Amit Naskar

Proceedings Volume 10971, 109711A (2019) https://doi.org/10.1117/12.2514256

KEYWORDS: Composites, Nanoparticles, Epoxies, Carbon, Structural health monitoring, Resistance, Coating, Nanomaterials, Fiber coatings

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Proceedings Article | 27 March 2018 Paper

The effect of nanoparticle enhanced sizing on the structural health monitoring sensitivity and mechanical properties of carbon fiber composites

Christopher Bowland, Ngoc Nguyen, Amit Naskar

Proceedings Volume 10599, 105990I (2018) https://doi.org/10.1117/12.2296655

KEYWORDS: Composites, Epoxies, Silicon carbide, Carbon, Structural health monitoring, Nanoparticles, Nanomaterials, Resistance, Fiber coatings

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Proceedings Article | 19 April 2017 Paper

Development of nanoparticle embedded sizing for enhanced structural health monitoring of carbon fiber composites

Christopher Bowland, Yangyang Wang, Amit Naskar

Proceedings Volume 10169, 101690L (2017) https://doi.org/10.1117/12.2260032

KEYWORDS: Composites, Carbon, Nanoparticles, Resistance, Epoxies, Structured optical fibers, Nanomaterials, Silicon carbide, Structural health monitoring, Sensors

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Showing 5 of 9 publications

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