基于高密度聚乙烯 (HDPE) 的纳米复合材料中的负电容与多壁碳纳米管 (CNTs)
Raymonde Mouecoucou1, Leïla Bonnaud2, Philippe Dubois2
1Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), Université de Lorraine, 2 Rue Edouard Belin, 57070 Metz, France.
Materials (Basel, Switzerland)
|July 29, 2023
概括
研究人员使用简单的融混合工艺创建了负电容 (NC) 的高密度聚乙烯 (HDPE) 纳米复合材料. 调整处理时间控制了聚合物晶体体的尺寸,影响了电特性,并使低频率的NC成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 电气工程 电气工程
背景情况:
- 在导电的聚合物纳米复合材料中观察到负电容 (NC).
- 最近的研究报告说,在具有导电粒子的非导电聚合物纳米复合材料中,低频率的NC.
- 这种系统中NC的机制和控制需要进一步研究.
研究的目的:
- 为了证明生产经济高密度聚乙烯 (HDPE) 纳米复合材料,在低频率显示负电容 (NC).
- 研究融混合时间对HDPE/多壁碳纳米管 (CNT) 纳米复合材料的电性能的影响.
- 为了确定聚合物晶体体大小,空间电荷效应和NC的发生之间的关系.
主要方法:
- 制造HDPE/CNT纳米复合材料,使用类似挤压的工艺,具有不同的融混合时间.
- 纳米复合材料的特征与4.6重量%的多壁碳纳米管 (CNTs) 达到透值.
- 分析电行为,重点关注负电容和电流振荡,与聚合物晶体体大小相关.
主要成果:
- 在低频率 (<10 kHz) 上显示NC的经济HDPE纳米复合材料通过调整融混合持续时间成功生产.
- 融化处理时间的增加导致了CNT表面上更大的HDPE晶体,破坏了CNT连接并改变了电气行为.
- 证实了NC,电流振荡和聚合物晶体大小之间的直接联系,在10分钟的融混合后观察到最佳NC.
结论:
- 融混合持续时间是控制HDPE/CNT纳米复合材料负电容效应的关键参数.
- HDPE晶体的尺寸显著影响电气性能,特别是NC的发生,通过界面上的空间电荷效应.
- 本研究提出了一种方便且环保的方法,用于生产具有可调节电气特性的功能纳米复合材料.
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