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Electrically conductive polymer-graphene composite material for selective laser sintering additive manufacturing
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).ORCID iD: 0000-0003-2965-0288
Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Mathematics, and Science Education (2023-).
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2024 (English)In: Progress in Biomedical Optics and Imaging - Proceedings of SPIE, SPIE - The International Society for Optics and Photonics, 2024, article id 1287317Conference paper, Published paper (Refereed)
Abstract [en]

Additive manufacturing is rapidly growing, where selective laser sintering technology dominates for industrial use. In the case of polymer selective laser sintering, polyamide is the standard material. However, polyamide is an electrical insulator, and for specific applications, it would be desirable to be able to manufacture polymer-based electrically conductive parts. Electromagnetic Compatibility is one of the most significant targeted applications, where the introduction of electric vehicles raises new electromagnetic compatibility demands. The goal is, therefore, to develop an electrically conductive composite material for selective laser sintering using graphene as the additive. Composites are prepared by mixing polyamide, graphene, and additives with varying graphene/polyamide ratios. The aim of this investigation is the laser-assisted processing of the resulting graphene/polyamide composites with various parameters to sinter the material, forming a solid conductive structure. The structure is characterized using SEM and resistance measurements. Results show sheet resistance values of about 700Ω/sq after laser-assisted processing with good powder flowability. 

Place, publisher, year, edition, pages
SPIE - The International Society for Optics and Photonics, 2024. article id 1287317
National Category
Manufacturing, Surface and Joining Technology
Identifiers
URN: urn:nbn:se:miun:diva-51255DOI: 10.1117/12.3003049Scopus ID: 2-s2.0-85190938683ISBN: 9781510670068 (electronic)OAI: oai:DiVA.org:miun-51255DiVA, id: diva2:1855384
Conference
Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Available from: 2024-04-30 Created: 2024-04-30 Last updated: 2024-12-18Bibliographically approved
In thesis
1. Optimizing laser processing for the production of advanced materials
Open this publication in new window or tab >>Optimizing laser processing for the production of advanced materials
2024 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Lasers, with their unparalleled precision and control, have become vital tools across numerous industries, offering transformative potential for the development of advanced materials. In this research, laser-assisted techniques were employed to develop and optimize functional materials for industrial and energy applications. By leveraging the unique properties of laser light, significant advancements were achieved in three key areas. First, selective laser sintering was employed to create electrically conductive polymer-graphene composites, demonstrating promising electrical conductivity, crucial for applications requiring electromagnetic compatibility. Second, rare-earth-doped nanocrystals were synthesized using ultrashort laser pulses, achieving precise control over nanoparticle size and morphology while maintaining consistent stoichiometry with the bulk material. This synthesis offers potential for applications in photonics due to the stability and tailored properties of the nanocrystal. Third, laser-assisted processing was applied to modify nanographite and nanographite-silicon composite anode materials for lithium-ion batteries. The laser-induced nanoporous structure in graphite-based anodes led to significant improvements in fast charging capabilities and specific capacity. Additionally, the optimization of silicon distribution within the nanographite matrix enhanced battery performance and cycling stability. These findings illustrate the versatility and efficacy of laser-assisted processing in tailoring material properties to meet the growing demands of advanced applications, offering a pathway to the development of next-generation materials with enhanced functionalities.

Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University, 2024. p. 59
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 207
Keywords
laser processing, nanoparticles, lithium-ion batteries, selective laser sintering, laser ablation in liquid, graphite anode
National Category
Materials Engineering
Identifiers
urn:nbn:se:miun:diva-53391 (URN)978-91-89786-89-9 (ISBN)
Presentation
2025-01-15, O102, Holmgatan 10, Sundsvall, 10:00 (English)
Opponent
Supervisors
Available from: 2024-12-19 Created: 2024-12-18 Last updated: 2024-12-19Bibliographically approved

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Bond, LukeAndersson, HenrikÖrtegren, JonasEngholm, Magnus

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Manufacturing, Surface and Joining Technology

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