Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite Cables
The insulation layer of deep-sea optoelectronic composite cables in direct contact with high-pressure and highly corrosive seawater is required for excellent water resistance, environmental stress cracking resistance (ESCR), and the ability to withstand high DC voltage. Although high-density polyeth...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/17/4/820 |
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| author | Shuhong Xie Zhenzhen Chen Zhiyu Yan Xingyu Qiu Ming Hu Chunfei Gu Xindong Zhao Kai Wang |
| author_facet | Shuhong Xie Zhenzhen Chen Zhiyu Yan Xingyu Qiu Ming Hu Chunfei Gu Xindong Zhao Kai Wang |
| author_sort | Shuhong Xie |
| collection | DOAJ |
| description | The insulation layer of deep-sea optoelectronic composite cables in direct contact with high-pressure and highly corrosive seawater is required for excellent water resistance, environmental stress cracking resistance (ESCR), and the ability to withstand high DC voltage. Although high-density polyethylene (HDPE) displays remarkable water resistance, it lacks sufficient resistance to environmental stress cracking (ESCR). This article is based on a blend modification approach to mixing HDPE with different vinyl copolymer materials (cPE-A and cPE-B). The processing performance and mechanical properties of the materials are evaluated through rheological and mechanical testing. The materials’ durability in working environments is assessed through ESCR tests and water resistance experiments. Ultimately, the direct current electrical performance of the materials is evaluated through tests measuring space charge distribution, direct current resistivity, and direct current breakdown strength. The results indicate that, in the polyethylene blend system, the rheological properties and ESCR characteristics of HDPE/cPE-A composite materials did not show significant improvement. Further incorporation of high melt index linear low-density polyethylene (LLDPE) material not only meets the requirements of extrusion processing but also exhibits a notable enhancement in ESCR performance. Meanwhile, copolymerized polyethylene cPE-B, with a more complex structure, proves effective in toughening HDPE materials. The material’s hardness significantly decreases, and when incorporating cPE-B at a level exceeding 20 phr, the composite materials achieve excellent ESCR performance. In a simulated seawater environment at 50 MPa, the water permeability of all co-modified composite materials remained below 0.16% after 120 h. The spatial charge distribution and direct current resistivity characteristics of the HDPE, cPE-A, and LLDPE composite systems surpassed those of the HDPE/cPE-B materials. However, the HDPE/cPE-B composite system exhibited superior dielectric strength. The application of composite materials in deep-sea electro–optical composite cables is highly promising. |
| first_indexed | 2024-03-07T22:34:21Z |
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| id | doaj.art-3983fd85f83b44b5b355d1e7f974b376 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-07T22:34:21Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3983fd85f83b44b5b355d1e7f974b3762024-02-23T15:15:09ZengMDPI AGEnergies1996-10732024-02-0117482010.3390/en17040820Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite CablesShuhong Xie0Zhenzhen Chen1Zhiyu Yan2Xingyu Qiu3Ming Hu4Chunfei Gu5Xindong Zhao6Kai Wang7Zhongtian Technology Group Co., Ltd., Nantong 226010, ChinaZhongtian Technology Submarine Cable Co., Ltd., Nantong 226001, ChinaZhongtian Technology Submarine Cable Co., Ltd., Nantong 226001, ChinaZhongtian Technology Submarine Cable Co., Ltd., Nantong 226001, ChinaZhongtian Technology Submarine Cable Co., Ltd., Nantong 226001, ChinaZhongtian Technology Submarine Cable Co., Ltd., Nantong 226001, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology, Harbin 150080, ChinaKey Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology, Harbin 150080, ChinaThe insulation layer of deep-sea optoelectronic composite cables in direct contact with high-pressure and highly corrosive seawater is required for excellent water resistance, environmental stress cracking resistance (ESCR), and the ability to withstand high DC voltage. Although high-density polyethylene (HDPE) displays remarkable water resistance, it lacks sufficient resistance to environmental stress cracking (ESCR). This article is based on a blend modification approach to mixing HDPE with different vinyl copolymer materials (cPE-A and cPE-B). The processing performance and mechanical properties of the materials are evaluated through rheological and mechanical testing. The materials’ durability in working environments is assessed through ESCR tests and water resistance experiments. Ultimately, the direct current electrical performance of the materials is evaluated through tests measuring space charge distribution, direct current resistivity, and direct current breakdown strength. The results indicate that, in the polyethylene blend system, the rheological properties and ESCR characteristics of HDPE/cPE-A composite materials did not show significant improvement. Further incorporation of high melt index linear low-density polyethylene (LLDPE) material not only meets the requirements of extrusion processing but also exhibits a notable enhancement in ESCR performance. Meanwhile, copolymerized polyethylene cPE-B, with a more complex structure, proves effective in toughening HDPE materials. The material’s hardness significantly decreases, and when incorporating cPE-B at a level exceeding 20 phr, the composite materials achieve excellent ESCR performance. In a simulated seawater environment at 50 MPa, the water permeability of all co-modified composite materials remained below 0.16% after 120 h. The spatial charge distribution and direct current resistivity characteristics of the HDPE, cPE-A, and LLDPE composite systems surpassed those of the HDPE/cPE-B materials. However, the HDPE/cPE-B composite system exhibited superior dielectric strength. The application of composite materials in deep-sea electro–optical composite cables is highly promising.https://www.mdpi.com/1996-1073/17/4/820submarine optoelectronic composite cableblending modificationenvironmental stress crack resistancewater resistancedirect current performance |
| spellingShingle | Shuhong Xie Zhenzhen Chen Zhiyu Yan Xingyu Qiu Ming Hu Chunfei Gu Xindong Zhao Kai Wang Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite Cables Energies submarine optoelectronic composite cable blending modification environmental stress crack resistance water resistance direct current performance |
| title | Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite Cables |
| title_full | Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite Cables |
| title_fullStr | Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite Cables |
| title_full_unstemmed | Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite Cables |
| title_short | Blending Modification Technology of Insulation Materials for Deep Sea Optoelectronic Composite Cables |
| title_sort | blending modification technology of insulation materials for deep sea optoelectronic composite cables |
| topic | submarine optoelectronic composite cable blending modification environmental stress crack resistance water resistance direct current performance |
| url | https://www.mdpi.com/1996-1073/17/4/820 |
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