Influence of imidazolium ionic liquids as organic filler dispersant on electrical properties of chitin/epoxy composites

IF 4.4 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

High Voltage Pub Date : 2024-06-19 DOI:10.1049/hve2.12461

Kai Yin, Qihong Fan, Jing Li, Taqi ur Rahman, Tianyin Zhang, Ashish Paramane, Xiangrong Chen

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Abstract

Ionic liquid (IL) as the dispersant can help disperse the organic nanofillers to improve the performance of epoxy resin remarkably. However, the effect of IL on the electrical properties of epoxy composites is not well documented. This comprehensive study consists of the preparation, material characterisation and systematical investigation of electrical properties of 1-Butyl-3-methylimidazole hexafluorophosphate-modified chitin fibre/epoxy composites. The findings show that introducing IL into a chitin/epoxy composite can minimise porosity defects and improve the compatibility between filler and matrix. However, a high concentration of IL induces severe charge injection into chitin/epoxy composites and internal electric field distortion. The addition of 0.75%–1.5% mass fraction IL results in maximum enhancement in the AC breakdown strength of the chitin/epoxy composite (by ∼71%) compared with the non-IL composites. The non-linear conductivity and non-uniform charge injection phenomena of IL-modified composites can be attributed to the movement of radicals and anions due to the decomposition of IL. Through this study, it is highly expected that the organic filler dispersion in the epoxy matrix can be optimised by tuning IL to improve the insulation properties.

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咪唑离子液体作为有机填料分散剂对甲壳素/环氧树脂复合材料电气性能的影响

离子液体（IL）作为分散剂可以帮助分散有机纳米填料，从而显著改善环氧树脂的性能。然而，IL 对环氧树脂复合材料电性能的影响还没有很好的文献记载。这项综合研究包括 1-丁基-3-甲基咪唑六氟磷酸盐改性甲壳素纤维/环氧树脂复合材料的制备、材料表征和电性能的系统研究。研究结果表明，在甲壳素/环氧树脂复合材料中引入 IL 可以最大限度地减少孔隙缺陷，并改善填料与基体之间的相容性。然而，高浓度的IL会在甲壳素/环氧树脂复合材料中引起严重的电荷注入和内部电场畸变。与非 IL 复合材料相比，添加 0.75%-1.5% 质量分数的 IL 可使甲壳素/环氧树脂复合材料的交流击穿强度得到最大程度的提高（提高 ∼ 71%）。IL 改性复合材料的非线性导电性和非均匀电荷注入现象可归因于 IL 分解引起的自由基和阴离子的移动。通过这项研究，我们非常期待通过调整 IL 来优化环氧基体中的有机填料分散，从而改善绝缘性能。

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来源期刊

High Voltage Energy-Energy Engineering and Power Technology

CiteScore

9.60

自引率

27.30%

发文量

审稿时长

21 weeks

期刊介绍： High Voltage aims to attract original research papers and review articles. The scope covers high-voltage power engineering and high voltage applications, including experimental, computational (including simulation and modelling) and theoretical studies, which include: Electrical Insulation ● Outdoor, indoor, solid, liquid and gas insulation ● Transient voltages and overvoltage protection ● Nano-dielectrics and new insulation materials ● Condition monitoring and maintenance Discharge and plasmas, pulsed power ● Electrical discharge, plasma generation and applications ● Interactions of plasma with surfaces ● Pulsed power science and technology High-field effects ● Computation, measurements of Intensive Electromagnetic Field ● Electromagnetic compatibility ● Biomedical effects ● Environmental effects and protection High Voltage Engineering ● Design problems, testing and measuring techniques ● Equipment development and asset management ● Smart Grid, live line working ● AC/DC power electronics ● UHV power transmission Special Issues. Call for papers: Interface Charging Phenomena for Dielectric Materials - https://digital-library.theiet.org/files/HVE_CFP_ICP.pdf Emerging Materials For High Voltage Applications - https://digital-library.theiet.org/files/HVE_CFP_EMHVA.pdf