应用化学 ›› 2024, Vol. 41 ›› Issue (11): 1648-1655.DOI: 10.19894/j.issn.1000-0518.240247

• 研究论文 • 上一篇    下一篇

辐照聚乙烯热熔带的性能及在电缆绝缘层修复中的应用

李靖威1, 郑睿鹏1(), 杨明2, 赵娟2, 郑帅2, 李娅珂3, 戚云霞2, 徐义全2, 刘佰军3   

  1. 1.生态环境部核与辐射安全中心,北京 102400
    2.中科英华长春高技术有限公司,长春 130000
    3.吉林大学化学学院,长春 130012
  • 收稿日期:2024-08-05 接受日期:2024-11-03 出版日期:2024-11-01 发布日期:2024-12-04
  • 通讯作者: 郑睿鹏
  • 基金资助:
    中科英华-吉林大学产学研开发项目(3R2231166412)

Properties of Irradiated Polyethylene Hot-Melt Tape and Its Application in Cable Insulation Layer Rejuvenation

Jing-Wei LI1, Rui-Peng ZHENG1(), Ming YANG2, Juan ZHAO2, Shuai ZHENG2, Ya-Ke LI3, Yun-Xia QI2, Yi-Quan XU2, Bai-Jun LIU3   

  1. 1.Nuclear and Radiation Safety Center of the Ministry of Ecology and Environment,National Nuclear and Radiation Regulatory Technology Research and Development Base,Beijing 102400,China
    2.Zhongke Yinghua Changchun High Tech Co. ?,Ltd. ?,Changchun 130000,China
    3.College of Chemistry,Jilin University,Changchun 130012,China
  • Received:2024-08-05 Accepted:2024-11-03 Published:2024-11-01 Online:2024-12-04
  • Contact: Rui-Peng ZHENG
  • About author:zhengruipeng123@126.com
  • Supported by:
    the Industry-University Collaborative Development Project of CAIC-Jul(3R2231166412)

摘要:

电缆绝缘层的破损直接影响到用电的安全性,经济环保的修复材料和修复方法的研究具有重要意义。 本文首先详细研究了不同剂量下电子束(EB)辐照聚乙烯带对材料热和力学性能的影响规律。 在此基础上,利用低剂量辐照聚乙烯(PE)材料特有的热熔融和热收缩特性,提出了一种修复局部破损交联聚乙烯(XLPE)电缆绝缘层的方法,并给出了具体的修复方案。 研究结果表明,低剂量辐照聚乙烯热熔带能够有效修复破损的电缆绝缘层,修复层与原绝缘层紧密熔接。 在40 kGy剂量下辐照后,热熔带的凝胶含量(质量分数)为33.6%,拉伸强度达到16.9 MPa,断裂伸长率为638.5%。 电阻达到2.94×1012 Ω,体积电阻为5.89×1014 Ω·m,相对介电常数为2.35,满足电缆应用要求。 修复后的电缆10 kV交流耐压通过39 kV/5 min,局部放电15 kV≤5 PC测试。 可见,低剂量辐照聚乙烯热熔带在电缆修复领域具有重要的应用前景。

关键词: 辐照交联, 聚乙烯, 电缆, 修复

Abstract:

The damage to the insulation layer of cables directly affects the safety of electricity use, and the research on economical and environmentally friendly rejuvenation materials and methods is of great significance. This work firstly investigates the influence of electron beam (EB) irradiation on the thermal and mechanical properties of polyethylene (PE) tape at different doses in detail. On this basis, a method for repairing the insulation layer of locally damaged cross-linked polyethylene (XLPE) cables is proposed by utilizing the unique hot-melt and thermal-shrinkage characteristics of low-dose irradiated PE materials, and a specific rejuvenation procedure is provided. The research results indicate that low-dose irradiated PE hot-melt tape can effectively repair damaged cable insulation layers, and the repair layer is tightly fused with the original insulation layer. After irradiation at a dose of 40 kGy, the tensile strength is 16.9 MPa, and the elongation at break is 638.5%. The resistance reaches 2.94×1012 Ω, and the volume resistance is 5.89×1014 Ω·m, which meets the requirement of cable applications. The repaired cable withstands the 10 kV AC voltage test at 39 kV/5 min and partial discharge test at 15 kV≤5 PC. It can be seen that low-dose irradiated PE hot-melt tape has important application prospects in the field of cable rejuvenation.

Key words: Irradiation crosslinking, Polyethylene, Cables, Rejuvenation

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