中国塑料 ›› 2025, Vol. 39 ›› Issue (12): 33-38.DOI: 10.19491/j.issn.1001-9278.2025.12.006

• 材料与性能 • 上一篇    下一篇

双轴拉伸改性氧化锆/聚丙烯复合介电薄膜的制备与性能研究

国江1, 许梦伊1, 黄想1, 郝好2, 游峰2, 李晨健2(), 江学良2   

  1. 1.中国电力科学研究院有限公司武汉分院(电网环境保护全国重点实验室),武汉 430074
    2.武汉工程大学材料科学与工程学院,湖北省等离子化学与新材料重点实验室,武汉 430205
  • 收稿日期:2025-05-28 出版日期:2025-12-26 发布日期:2025-12-22
  • 通讯作者: 李晨健(1992—),男,博士,从事聚合物基复合材料研究,leeschool@sina.com
    E-mail:leeschool@sina.com
  • 作者简介:第一联系人:地址:北京市海淀区阜成路11号《中国塑料》杂志社
    邮编:100048
  • 基金资助:
    2023年湖北省科技计划立项项目(2023BAB001)

Preparation and performance of biaxially oriented modified zirconia/polypropylene composite dielectric films

GUO Jiang1, XU Mengyi1, HUANG Xiang1, HAO Hao2, YOU Feng2, LI Chenjian2(), JIANG Xueliang2   

  1. 1.State Key Laboratory of Power Grid Environmental Protection,Wuhan Branch of China Electric Power Research Institute Co,Ltd,Wuhan 430074,China
    2.School of Materials Science and Engineering,Wuhan Engineering University,Hubei Provincial Key Laboratory of Plasma Chemistry and New Materials,Wuhan 430205,China
  • Received:2025-05-28 Online:2025-12-26 Published:2025-12-22
  • Contact: LI Chenjian E-mail:leeschool@sina.com

摘要:

在纳米氧化锆(纳米ZrO2)表面接枝氨基(NH2), 并与马来酸酐接枝聚丙烯(PP⁃g⁃MAH)和聚丙烯(PP)进行共混挤出,得到复合粒料。随后,通过流延及双轴拉伸工艺制备得到改性氧化锆/聚丙烯复合介电薄膜(NH2⁃ZrO2/PP⁃g⁃MAH/PP)。在NH2⁃ZrO2/PP⁃g⁃MAH/PP介电薄膜中,通过NH2⁃ZrO2与PP⁃g⁃MAH进行反应,将PP接枝在NH2⁃ZrO2表面,以提高ZrO2在PP基体中的分散性和相容性。同时,探究NH2⁃ZrO2/PP⁃g⁃MAH/PP复合薄膜的介电性能,热学性能和力学性能。结果表明,相关改性方法赋予了NH2⁃ZrO2/PP⁃g⁃MAH/PP的高的介电常数和击穿电压,同时显著地降低的介电损耗;在1kH测试频率下时,当NH2⁃ZrO2含量为2.5 %时,NH2⁃ZrO2/PP⁃g⁃MAH/PP复合薄膜的介电常数相较于PP(2.25)提升至4.46,击穿场强可达到492 MV/m;同时,介电损耗降低至0.002 5。

关键词: 氧化锆, 聚丙烯, 相容剂, 介电常数, 击穿场强

Abstract:

Nano⁃zirconia (nano⁃ZrO₂) was surface⁃grafted with amino groups (NH₂) and then melt⁃blended with polypropylene⁃g⁃maleic anhydride (PP⁃g⁃MAH) and polypropylene (PP) to form composite pellets. These pellets were processed into dielectric films via casting followed by biaxial orientation. The grafting reaction between the NH₂ groups on ZrO₂ and the anhydride groups of PP⁃g⁃MAH improved the dispersion and compatibility of the nanoparticles within the PP matrix. The resulting NH₂⁃ZrO₂/PP⁃g⁃MAH/PP composite films exhibited enhanced dielectric, thermal, and mechanical properties. Specifically, at a test frequency of 1 kHz and with 2.5 wt% NH₂⁃ZrO₂ content, the composite film achieved a dielectric constant of 4.46, significantly higher than that of pure PP (2.25), along with high breakdown strength of 492 MV/m and a low dielectric loss of only 0.002 5. These results demonstrated that the applied modification strategy effectively yielded a composite film with a high dielectric constant and breakdown voltage while significantly suppressing dielectric loss.

Key words: zirconia, polypropylene, compatibilizer, dielectric constant, breakdown field strength

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