The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibers
The effects of heat treatment temperatures from 1000 to 2700 °C on the structural, chemical, and mechanical properties of polyacrylonitrile-based carbon fibers (CFs) were investigated. Structural changes affected mechanical properties, and in particular, a higher sp3 content induced a higher tensile...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-10-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127522006931 |
| _version_ | 1828224083298353152 |
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| author | Min Park Dawon Jang Morinobu Endo Sungho Lee Dong Su Lee |
| author_facet | Min Park Dawon Jang Morinobu Endo Sungho Lee Dong Su Lee |
| author_sort | Min Park |
| collection | DOAJ |
| description | The effects of heat treatment temperatures from 1000 to 2700 °C on the structural, chemical, and mechanical properties of polyacrylonitrile-based carbon fibers (CFs) were investigated. Structural changes affected mechanical properties, and in particular, a higher sp3 content induced a higher tensile strength below 1600 °C. For a comprehensive study on the heat treatment effect and the mechanism for developing high-strength CFs, electrical transport properties were measured for the CFs. The transport behaviors in temperature-dependent conductivity and magnetoresistance were also significantly modified, which led to crossover from strong localization to weak localization due to sp2 carbon ordering. Interestingly, in samples that were subjected to intermediate heat treatment temperatures ranging from 1100 to 1600 °C, anomalous metallic temperature-dependent behavior was observed at low temperatures of below 40 K. This unusual charge transport was analyzed further with a pertinent heterogeneous model employing three-dimensional variable range hopping, weak localization, and linear metallic transport. The results suggest that mixed noncrystalline and crystalline structures with sp2/sp3 carbons, oxygen, and quaternary N groups in CFs enabled the transition behavior at such low temperatures. |
| first_indexed | 2024-04-12T17:16:09Z |
| format | Article |
| id | doaj.art-a6f800b1b4d94adb912e32bfc6a93a9f |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-12T17:16:09Z |
| publishDate | 2022-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-a6f800b1b4d94adb912e32bfc6a93a9f2022-12-22T03:23:39ZengElsevierMaterials & Design0264-12752022-10-01222111071The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibersMin Park0Dawon Jang1Morinobu Endo2Sungho Lee3Dong Su Lee4Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of KoreaCarbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of KoreaInstitute of Carbon Science and Technology, Shinshu University, Nagano, JapanCarbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of Korea; Department of Quantum System Engineering, Jeonbuk National University, 567 Baekje-ro, Deokjin-gu, Jeonju, Jeonbuk 54896, Republic of Korea; Corresponding authors at: Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of Korea (S. Lee).Functional Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of Korea; Corresponding authors at: Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55324, Republic of Korea (S. Lee).The effects of heat treatment temperatures from 1000 to 2700 °C on the structural, chemical, and mechanical properties of polyacrylonitrile-based carbon fibers (CFs) were investigated. Structural changes affected mechanical properties, and in particular, a higher sp3 content induced a higher tensile strength below 1600 °C. For a comprehensive study on the heat treatment effect and the mechanism for developing high-strength CFs, electrical transport properties were measured for the CFs. The transport behaviors in temperature-dependent conductivity and magnetoresistance were also significantly modified, which led to crossover from strong localization to weak localization due to sp2 carbon ordering. Interestingly, in samples that were subjected to intermediate heat treatment temperatures ranging from 1100 to 1600 °C, anomalous metallic temperature-dependent behavior was observed at low temperatures of below 40 K. This unusual charge transport was analyzed further with a pertinent heterogeneous model employing three-dimensional variable range hopping, weak localization, and linear metallic transport. The results suggest that mixed noncrystalline and crystalline structures with sp2/sp3 carbons, oxygen, and quaternary N groups in CFs enabled the transition behavior at such low temperatures.http://www.sciencedirect.com/science/article/pii/S0264127522006931PolyacrylonitrileCarbon fiberElectrical resistivityCharge transportHeat treatment |
| spellingShingle | Min Park Dawon Jang Morinobu Endo Sungho Lee Dong Su Lee The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibers Materials & Design Polyacrylonitrile Carbon fiber Electrical resistivity Charge transport Heat treatment |
| title | The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibers |
| title_full | The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibers |
| title_fullStr | The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibers |
| title_full_unstemmed | The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibers |
| title_short | The effect of heat treatment on temperature-dependent transport and magnetoresistance in polyacrylonitrile-based carbon fibers |
| title_sort | effect of heat treatment on temperature dependent transport and magnetoresistance in polyacrylonitrile based carbon fibers |
| topic | Polyacrylonitrile Carbon fiber Electrical resistivity Charge transport Heat treatment |
| url | http://www.sciencedirect.com/science/article/pii/S0264127522006931 |
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