Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound water
The additional moisture can be easily introduced into dielectric materials with the nano-doping, which could have adverse impacts on the insulating properties. Herein, samples with different moisture absorption are tested using Terahertz (THz) waves. The relaxation resonance integrated polarization...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-05-01
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| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941823001113 |
| _version_ | 1797836770457419776 |
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| author | Jiuyi Wang Hanqing Wang Li Cheng Wei Fang Xinlong Zhang Bo Tao Ruijin Liao |
| author_facet | Jiuyi Wang Hanqing Wang Li Cheng Wei Fang Xinlong Zhang Bo Tao Ruijin Liao |
| author_sort | Jiuyi Wang |
| collection | DOAJ |
| description | The additional moisture can be easily introduced into dielectric materials with the nano-doping, which could have adverse impacts on the insulating properties. Herein, samples with different moisture absorption are tested using Terahertz (THz) waves. The relaxation resonance integrated polarization model is developed to illustrate the water absorption effect by the nano-filler on the THz spectrum, which is related to the hydrogen bond (HB) state of water molecular clusters. Detection of moisture content is realized by the polarized resonance intensity in the proposed model. The different HB states of free water and bound water are effectively distinguished using the Debye parameters in the model, and the formation process of water involved in the HB network is analyzed. Meanwhile, the proposed model is verified by molecular simulation. This work provides an application-worthy method to distinguish nuances in moisture contents and distribution in nano-dielectrics, with advantages of non-destructiveness, rapidity and 2D visualization. |
| first_indexed | 2024-04-09T15:15:20Z |
| format | Article |
| id | doaj.art-b678e0dd3aa4424ba4b03c21a9018d2e |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-04-09T15:15:20Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-b678e0dd3aa4424ba4b03c21a9018d2e2023-04-30T06:05:22ZengElsevierPolymer Testing0142-94182023-05-01122108031Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound waterJiuyi Wang0Hanqing Wang1Li Cheng2Wei Fang3Xinlong Zhang4Bo Tao5Ruijin Liao6School of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, ChinaSchool of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, ChinaCorresponding author.; School of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, ChinaSchool of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, ChinaSchool of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, ChinaSchool of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, ChinaSchool of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, ChinaThe additional moisture can be easily introduced into dielectric materials with the nano-doping, which could have adverse impacts on the insulating properties. Herein, samples with different moisture absorption are tested using Terahertz (THz) waves. The relaxation resonance integrated polarization model is developed to illustrate the water absorption effect by the nano-filler on the THz spectrum, which is related to the hydrogen bond (HB) state of water molecular clusters. Detection of moisture content is realized by the polarized resonance intensity in the proposed model. The different HB states of free water and bound water are effectively distinguished using the Debye parameters in the model, and the formation process of water involved in the HB network is analyzed. Meanwhile, the proposed model is verified by molecular simulation. This work provides an application-worthy method to distinguish nuances in moisture contents and distribution in nano-dielectrics, with advantages of non-destructiveness, rapidity and 2D visualization.http://www.sciencedirect.com/science/article/pii/S0142941823001113Terahertz waveNon-destructive testingNanodielectricsMoisture distribution |
| spellingShingle | Jiuyi Wang Hanqing Wang Li Cheng Wei Fang Xinlong Zhang Bo Tao Ruijin Liao Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound water Polymer Testing Terahertz wave Non-destructive testing Nanodielectrics Moisture distribution |
| title | Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound water |
| title_full | Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound water |
| title_fullStr | Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound water |
| title_full_unstemmed | Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound water |
| title_short | Terahertz relaxation polarization modeling of micro-water inside nano-modified dielectrics and imaging distribution of free/bound water |
| title_sort | terahertz relaxation polarization modeling of micro water inside nano modified dielectrics and imaging distribution of free bound water |
| topic | Terahertz wave Non-destructive testing Nanodielectrics Moisture distribution |
| url | http://www.sciencedirect.com/science/article/pii/S0142941823001113 |
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