High-Performance Insulating Nanomaterials: From Dielectric Design to Applications in Extreme Conditions

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: 10 September 2026 | Viewed by 1296

Special Issue Editors

Hebei Key Laboratory of Green and Efficient New Electrical Materials and Equipment, North China Electric Power University, Baoding 071003, China
Interests: insulating material; nanocomposite materials; fiber-reinforced materials; electrical equipment; research and development of films and coatings; multidimensional structure; improvement of material properties

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Guest Editor
Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding 071003, China
Interests: silicone rubber; corrosion resistance; insulation failure mechanism; nanostructure modification; gap numerical simulation; electroluminescence

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Guest Editor
Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China
Interests: resin biodegradation; mold and algae contamination; silicone rubber composite insulators; degradation mechanism; insulator contamination identification

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Guest Editor Assistant
School of Electrical and Electronic Engineering, North China Electric Power University, Baoding 071003, China
Interests: fiber interface modification; nanostructure modification; relaxation characteristics; dielectric properties; plasma; electrical materials

Special Issue Information

Dear Colleagues,

Multidimensional composite materials exhibit distinctive physical and chemical properties, which have attracted extensive attention in the field of materials science and engineering in recent years. Particularly in emerging technologies and high-performance applications, multidimensional composites are being increasingly utilized as critical functional materials. We invite authors to contribute original research articles, both theoretical and experimental, focusing on subjects such as multidimensional composites, nanoenhancement, multifunctional layered materials, fiber-reinforced composites, nanocomposite coatings, and novel composite structure design and devices. This Special Issue will provide a systematic overview of the latest advancements in the fundamental research and practical development of composite materials, with emphasis on representative systems and phenomena that demonstrate outstanding properties along with scientific depth and technological potential. Potential topics include but are not limited to the following:

  • High-performance multi-dimensional composite materials;
  • Mechanisms for improving the performance of composite materials;
  • Nanoenhancement and fiber-reinforced structures;
  • Nanocomposite coatings;
  • The properties and characterization of nanocomposites;
  • Innovative research on composite material modification;
  • Composite insulated electrical equipment.

Dr. Le Li
Dr. Jianghai Geng
Dr. Shifang Yang
Guest Editors

Dr. Jingxuan Song
Guest Editor Assistant

Manuscript Submission Information

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Keywords

  • multidimensional nanostructure
  • nanometer enhancement
  • fiber modification
  • mechanism of material performance improvement
  • performance and characterization
  • electrical equipment

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Published Papers (2 papers)

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Research

17 pages, 3800 KB  
Article
The Effects of K-BNNS Nanoparticles on PD Characteristics of Composite Aramid Paper
by Yan-Hong Chen, Xiao-Nan Li, Wen-Xu Zhang, Tong Qin, Qi-Kun Cheng and Bin Wu
Nanomaterials 2026, 16(4), 249; https://doi.org/10.3390/nano16040249 - 14 Feb 2026
Viewed by 362
Abstract
Aramid paper serves as an insulating material in high-frequency power electronic transformers, and the incorporation of composite K-BNNS particles has been shown to enhance the insulating properties of aramid paper. Partial discharge (PD) is a predominant phenomenon that can lead to insulation failure [...] Read more.
Aramid paper serves as an insulating material in high-frequency power electronic transformers, and the incorporation of composite K-BNNS particles has been shown to enhance the insulating properties of aramid paper. Partial discharge (PD) is a predominant phenomenon that can lead to insulation failure in high-frequency transformers. Therefore, this paper primarily investigates the PD performances of different nanoparticle doping concentrations on aramid paper. Firstly, composite aramid papers containing K-BNNSs at different concentrations are prepared, namely 5%, 8%, 10% and 13%, respectively. Then, the experimental platforms of PD for composite aramid paper are established, and the PD performances, surface potentials, and hydrogen bonds under different high-frequency applied voltages are discussed. The experiment results show that the composite aramid paper with 10% K-BNNSs nanoparticle content has the optimal insulation performance. In the needle-plate and column-plate models, the PD amplitude decreases by 65.35% and 27.33%, respectively, when compared with non-doped aramid paper. Moreover, the breakdown voltage improves by 32.2% and 38.5%, respectively. After that, the influence mechanisms of residual charges and hydrogen bonds on the PD characteristics of composite aramid paper are analyzed. The results obtained in this paper can provide important reference for the design and selection of insulation materials for high-frequency transformers. Full article
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18 pages, 9659 KB  
Article
Study on Dielectric Properties of Nanoclay-Modified Disulfide-Containing Polyurea Composites
by Xinjian Li, Fan Wang, Haowen Yin, Yang Wang, Guangxi Li, Junjie Huang, Yanhe Yuan, Minghao Zhou, Shuai Zhao, Yingjie Liang, Guangyu Cao and Le Li
Nanomaterials 2026, 16(3), 171; https://doi.org/10.3390/nano16030171 - 27 Jan 2026
Viewed by 465
Abstract
To address the frequent faults (e.g., bird-related hazards, wind deviation) of transmission lines under extreme environments and the limitations of traditional insulating materials (insufficient dielectric properties, poor interface compatibility, etc.), this study synthesized a disulfide-containing polyurea (DPU) with dynamic covalent bonds and prepared [...] Read more.
To address the frequent faults (e.g., bird-related hazards, wind deviation) of transmission lines under extreme environments and the limitations of traditional insulating materials (insufficient dielectric properties, poor interface compatibility, etc.), this study synthesized a disulfide-containing polyurea (DPU) with dynamic covalent bonds and prepared Halloysite nanotubes (HNTs) modified by aminopropyltriethoxysilane (APTES) to form the HNTs/DPU composite. Methods included characterizations like Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and performance tests such as contact angle measurement, breakdown strength, arc resistance, dielectric constant tests, and a tower gap breakdown test. Results showed that APTES modification enhanced interface compatibility, leading to a uniform and dense microstructure. Compared with commercial polyurea (CPU) and commercial insulating sheath (CIS), HNTs/DPU exhibited superior performance: higher glass transition temperature (Tg) and thermal stability, excellent hydrophobicity, improved breakdown strength and dielectric constant, longer arc resistance time by blocking microcrack propagation, and optimal insulation effect at 4 mm coating thickness in the tower gap test with a significantly higher breakdown voltage. In conclusion, HNTs/DPU provides a new technical solution for transmission line insulation protection under extreme conditions, with comparative data demonstrating advancements over existing materials. Full article
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