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Laser Induced Graphene on Lignin Upgraded Stretchable Polymer Films
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- Author / Creator
- Sinha, Kaustubh
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Graphene is a unique material which exhibits exceptional electrical, mechanical and chemical properties owing to its two-dimensional structure. A global effort has been made to produce this material in the past decade, and researchers have come up with several fabrication techniques. Although, laser induced graphene (LIG) is a relatively novel fabrication technique to produce graphene, LIG has been demonstrated for various applications on a variety of substrates such as wood, polyimide films and DVD disks which are either non-renewable and flexible or environment friendly but mechanically rigid. This thesis describes the fabrication of a lignin enhanced stretchable polymer matrix which is used to produce LIG via a commercially available scribing laser. It was found that marginal addition of lignin to create the polymer matrix yields better LIG with increasing lignin concentration. Also, slower laser trace speeds yield higher quality porous LIG structures with fewer structural defects and highly multilayer LIG. To demonstrate the application for flexible electronics, the LIG was deployed as a pressure sensor as a proof of concept.
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- Subjects / Keywords
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- Graduation date
- Fall 2020
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- Type of Item
- Thesis
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- Degree
- Master of Science
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- License
- Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.