Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent casting
Graphene-polymer nanocomposite films show good piezoresistive behaviour and it is reported that the sensitivity increases either with the increased sheet resistance or decreased number density of the graphene fillers. A little is known about this behaviour near the percolation region. In this study,...
| প্রধান লেখক: | , , |
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| বিন্যাস: | প্রবন্ধ |
| ভাষা: | English |
| প্রকাশিত: |
Budapest University of Technology
2017-07-01
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| মালা: | eXPRESS Polymer Letters |
| বিষয়গুলি: | |
| অনলাইন ব্যবহার করুন: | http://www.expresspolymlett.com/letolt.php?file=EPL-0007992&mi=cd |
| _version_ | 1831614694661554176 |
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| author | S. Makireddi F. V. Varghese K. Balasubramaniam |
| author_facet | S. Makireddi F. V. Varghese K. Balasubramaniam |
| author_sort | S. Makireddi |
| collection | DOAJ |
| description | Graphene-polymer nanocomposite films show good piezoresistive behaviour and it is reported that the sensitivity increases either with the increased sheet resistance or decreased number density of the graphene fillers. A little is known about this behaviour near the percolation region. In this study, graphene nanoplatelet (GNP)/poly (methyl methacrylate) (PMMA) flexible films are fabricated via solution casting process at varying weight percent of GNP. Electrical and piezoresistive behaviour of these films is studied as a function of GNP concentration. Piezoresistive strain sensitivity of the films is measured by affixing the film to an aluminium specimen which is subjected to monotonic uniaxial tensile load. The change in resistance of the film with strain is monitored using a four probe. An electrical percolation threshold at 3 weight percent of GNP is observed. We report non-monotonic piezoresistive behaviour of these films as a function GNP concentration. We observe an increase in gauge factor (GF) with unstrained resistance of the films up to a critical resistance corresponding to percolation threshold. Beyond this limit the GF decreases with unstrained resistance. |
| first_indexed | 2024-12-18T19:34:23Z |
| format | Article |
| id | doaj.art-24a58941127c43f18b0216b681c66471 |
| institution | Directory Open Access Journal |
| issn | 1788-618X |
| language | English |
| last_indexed | 2024-12-18T19:34:23Z |
| publishDate | 2017-07-01 |
| publisher | Budapest University of Technology |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj.art-24a58941127c43f18b0216b681c664712022-12-21T20:55:39ZengBudapest University of TechnologyeXPRESS Polymer Letters1788-618X2017-07-0111758158810.3144/expresspolymlett.2017.55Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent castingS. MakireddiF. V. VargheseK. BalasubramaniamGraphene-polymer nanocomposite films show good piezoresistive behaviour and it is reported that the sensitivity increases either with the increased sheet resistance or decreased number density of the graphene fillers. A little is known about this behaviour near the percolation region. In this study, graphene nanoplatelet (GNP)/poly (methyl methacrylate) (PMMA) flexible films are fabricated via solution casting process at varying weight percent of GNP. Electrical and piezoresistive behaviour of these films is studied as a function of GNP concentration. Piezoresistive strain sensitivity of the films is measured by affixing the film to an aluminium specimen which is subjected to monotonic uniaxial tensile load. The change in resistance of the film with strain is monitored using a four probe. An electrical percolation threshold at 3 weight percent of GNP is observed. We report non-monotonic piezoresistive behaviour of these films as a function GNP concentration. We observe an increase in gauge factor (GF) with unstrained resistance of the films up to a critical resistance corresponding to percolation threshold. Beyond this limit the GF decreases with unstrained resistance.http://www.expresspolymlett.com/letolt.php?file=EPL-0007992&mi=cdNanocompositesGrapheneSmart polymersPercolationPiezoresistive behaviour |
| spellingShingle | S. Makireddi F. V. Varghese K. Balasubramaniam Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent casting eXPRESS Polymer Letters Nanocomposites Graphene Smart polymers Percolation Piezoresistive behaviour |
| title | Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent casting |
| title_full | Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent casting |
| title_fullStr | Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent casting |
| title_full_unstemmed | Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent casting |
| title_short | Non-monotonic piezoresistive behaviour of graphene nanoplatelet (GNP)-polymer composite flexible films prepared by solvent casting |
| title_sort | non monotonic piezoresistive behaviour of graphene nanoplatelet gnp polymer composite flexible films prepared by solvent casting |
| topic | Nanocomposites Graphene Smart polymers Percolation Piezoresistive behaviour |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0007992&mi=cd |
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