多层介孔纳米MgO/低密度聚乙烯复合材料的制备及其绝缘性能

巫运辉, 查俊伟, 王思蛟, 闫轰达, 党智敏

巫运辉, 查俊伟, 王思蛟, 等. 多层介孔纳米MgO/低密度聚乙烯复合材料的制备及其绝缘性能[J]. 复合材料学报, 2016, 33(3): 503-509. DOI: 10.13801/j.cnki.fhclxb.20150528.006
引用本文: 巫运辉, 查俊伟, 王思蛟, 等. 多层介孔纳米MgO/低密度聚乙烯复合材料的制备及其绝缘性能[J]. 复合材料学报, 2016, 33(3): 503-509. DOI: 10.13801/j.cnki.fhclxb.20150528.006
WU Yunhui, ZHA Junwei, WANG Sijiao, et al. Preparation and insulating electrical properties of multilayer mesoporous nano MgO/low density polyethylene composites[J]. Acta Materiae Compositae Sinica, 2016, 33(3): 503-509. DOI: 10.13801/j.cnki.fhclxb.20150528.006
Citation: WU Yunhui, ZHA Junwei, WANG Sijiao, et al. Preparation and insulating electrical properties of multilayer mesoporous nano MgO/low density polyethylene composites[J]. Acta Materiae Compositae Sinica, 2016, 33(3): 503-509. DOI: 10.13801/j.cnki.fhclxb.20150528.006

多层介孔纳米MgO/低密度聚乙烯复合材料的制备及其绝缘性能

基金项目: 国家自然科学基金(51207009);国家"973"计划(2014CB239503);北京市科技计划(Z13110300590000)
详细信息
    通讯作者:

    党智敏,博士,教授,博士生导师,研究方向为介电高分子材料、高储能密度材料设计与制备。E-mail:dangzm@ustb.edu.cn

  • 中图分类号: TM85

Preparation and insulating electrical properties of multilayer mesoporous nano MgO/low density polyethylene composites

  • 摘要: 塑料高压直流电缆在电力输运中,绝缘层容易发生电子及空穴注入并局部积聚,形成空间电荷包,长期运行容易引发绝缘失效。为此,抑制电子及空穴的注入、积聚,防止空间电荷包的产生是制备塑料高压直流电缆的关键技术。通过制备多层介孔结构纳米MgO,采用低沸点溶剂法,实现了纳米MgO在低密度聚乙烯(LDPE)中的均匀分散。研究了1wt%纳米MgO/LDPE复合材料的空间电荷行为、直流击穿强度、热刺激电流及介电特性。结果表明:添加1wt%纳米MgO的LDPE在70 kV/mm电场下有效地抑制了空间电荷积聚,提高了直流击穿强度,降低了介电常数;热刺激电流研究表明纳米MgO形成了新的陷阱,有效捕获了载流子,形成独立电场,避免了局部有效电场,形成新的势垒,抑制了电极载流子的注入,最终抑制了空间电荷积聚。
    Abstract: Polymer high-voltage direct current cables accompany with the injection of electrons and holes of insulating layer which accumulated in local polymer will form space charge packet and trigger insulation breakdown in electric power transmission. Therefore, the key technology of preparing polymer high-voltage direct current cables is to suppress the injection and accumulation of electrons and holes, prevent the formation of space charge packet. By preparing the multi-layer mesoporous structure nano MgO, uniform dispersion of nano MgO in low density polyethylene (LDPE) was realized by using the low boiling point solvent method. The characteristics of space charge, direct current breakdown strength, thermally stimulated current and dielectric properties of 1wt% nano MgO/LDPE composites were studied. The results reveal that adding 1wt% nano MgO into LDPE can effectively suppress space charge accumulation under the 70 kV/mm electric field, improving direct current breakdown strength, decreasing the dielectric permittivity. Thermally stimulated current research shows that nano MgO induces new traps, effectively captures charge carriers and independent electrical field forms, avoids local effective electrical field, forms a new barrier, suppresses the injection of electrode carrier, and suppresses space charge accumulation eventually.
  • 期刊类型引用(7)

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    3. 郑昌佶,王博,杨佳明,赵洪. 纳米SiO_2分散性对SiO_2/LDPE纳米复合材料直流介电性能的影响. 复合材料学报. 2023(03): 1417-1429 . 本站查看
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    7. 刘标,党智敏,张冬丽,王思蛟. 绝缘电缆用LDPE/EPDM复合材料力学性能及电性能研究. 绝缘材料. 2019(09): 36-41 . 百度学术

    其他类型引用(4)

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出版历程
  • 收稿日期:  2015-04-06
  • 修回日期:  2015-05-10
  • 刊出日期:  2016-03-14

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