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Nanomaterials
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Functional Nano-Hybrid Insulation Materials
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Functional Nano-Hybrid Insulation Materials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanocomposite Materials".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 2144

Special Issue Editors

Prof. Dr. Chao Tang

E-Mail Website
Guest Editor
College of Engineering and Technology, Southwest University, Chongqing 400715, China
Interests: on-line monitoring; fault diagnosis and condition evaluation technology of electrical equipment; modification; modeling and simulation of dielectric materials
Prof. Dr. Tao Zhang

E-Mail Website
Guest Editor
College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China
Interests: high voltage insulation test technology; oil-paper insulation of power transformer
Prof. Dr. Yiyi Zhang

E-Mail Website
Guest Editor
Guangxi Key Laboratory of Power System Optimization and Energy Technology, Guangxi University, Nanning 530004, China
Interests: high voltage; electrical insulation; heat sink; PCM; multiphysics coupling; thyristor; temperature field; cellulose insulation; transformers
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Due to the rapid development of science and technology, the demand for energy, especially electric energy, increases daily. Power failures worldwide remind us that close attention should be paid to power grid safety. The security of power equipment is an important part of power grid security. The safe operation of power equipment is a result of long-term stable and reliable insulating materials. Thus, improving the performance of insulating materials to meet the needs of long-term safe operation of various power equipment has become a research hotspot in recent years.

This Special Issue of ‘Nanomaterials’ aims to present the current state of the art in ‘Functional Nano-Hybrid Insulation Materials’, a field mainly interested in physical and chemical modification of solid and liquid insulating media, achieved using nanoparticles or modified nanoparticles. We welcome contributions (communications, full papers, and reviews) from leading groups in the field that aim to provide original and exciting views of the current state of the art in this discipline.

Potential topics include (but are not limited to):

  • The fundamental science of nano-hybrid insulation materials, including quantum mechanics, thermodynamics, defects, and traps characterized by sophisticated experimental techniques and state-of-the-art theory.
  • The underlying principles and mechanisms of the physicochemical properties of nano-hybrid insulation materials understood by experimental studies and theoretical calculations.
  • Atomistic (ab initio, molecular dynamics) simulation and first-principles prediction of novel physical and chemical properties of nano-hybrid insulation materials.
  • Surface and internal interactions of nano- and micro-particles with insulation materials.
  • Preparation, evaluation, and application of nano-hybrid insulation materials in power equipment.

Prof. Dr. Chao Tang
Prof. Dr. Tao Zhang
Prof. Dr. Yiyi Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nano materials
  • surface and internal interactions
  • advanced applications
  • molecular dynamics
  • first-principles calculation
  • heat and mass transfer

Published Papers (2 papers)

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Research

14 pages, 4826 KiB  
Article
Plasma Fluorinated Nano-SiO2 Enhances the Surface Insulation Performance of Glass Fiber Reinforced Polymer
by Qijun Duan, Guowei Xia, Yanze Song, Guohua Yin, Yuyao Zhong, Jun Xie and Qing Xie
Nanomaterials 2023, 13(5), 906; https://doi.org/10.3390/nano13050906 - 28 Feb 2023
Viewed by 1441
Abstract
With the extensive application of glass fiber reinforced polymer (GFRP) in the field of high voltage insulation, its operating environment is becoming more and more complex, and the surface insulation failure has gradually become a pivotal problem affecting the safety of equipment. In [...] Read more.
With the extensive application of glass fiber reinforced polymer (GFRP) in the field of high voltage insulation, its operating environment is becoming more and more complex, and the surface insulation failure has gradually become a pivotal problem affecting the safety of equipment. In this paper, nano-SiO2 was fluorinated by Dielectric barrier discharges (DBD) plasma and doped with GFRP to enhance the insulation performance. Through Fourier Transform Ioncyclotron Resonance (FTIR) and X-ray Photoelectron Spectroscopy (XPS) characterization of nano fillers before and after modification, it was found that plasma fluorination can graft a large number of fluorinated groups on the surface of SiO2. The introduction of fluorinated SiO2 (FSiO2) can significantly enhance the interfacial bonding strength of the fiber, matrix and filler in GFRP. The DC surface flashover voltage of modified GFRP was further tested. The results show that both SiO2 and FSiO2 can improve the flashover voltage of GFRP. When the concentration of FSiO2 is 3%, the flashover voltage increases most significantly to 14.71 kV, which is 38.77% higher than that of unmodified GFRP. The charge dissipation test results show that the addition of FSiO2 can inhibit the surface charge migration. By the calculation of Density functional theory (DFT) and charge trap, it is found that grafting fluorine-containing groups on SiO2 can increase its band gap and enhance its electron binding ability. Furthermore, a large number of deep trap levels are introduced into the nanointerface inside GFRP to enhance the inhibition of secondary electron collapse, thus increasing the flashover voltage. Full article
(This article belongs to the Special Issue Functional Nano-Hybrid Insulation Materials)
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15 pages, 4210 KiB  
Article
Study on the Anti-Aging Performance of Different Nano-Modified Natural Ester Insulating Oils Based on Molecular Dynamics
by Tao Zhang, Min Chen, Haohan Zhou, Guangrui Shi, Xiping Fan and Qian Wu
Nanomaterials 2023, 13(4), 653; https://doi.org/10.3390/nano13040653 - 07 Feb 2023
Cited by 2 | Viewed by 1105
Abstract
In order to investigate the anti-aging performance of nano-modified natural ester insulating oils, in this paper, two different types of nanoparticles are selected to modify insulating oils. We studied the microscopic mechanism of nano-modified models using molecular simulation techniques. Three models were established: [...] Read more.
In order to investigate the anti-aging performance of nano-modified natural ester insulating oils, in this paper, two different types of nanoparticles are selected to modify insulating oils. We studied the microscopic mechanism of nano-modified models using molecular simulation techniques. Three models were established: an oil–water model without the addition of nanoparticles and two which contained nano-Fe3O4 and nano-Al2O3 particles, where the concentration of water was 1 wt.%. The research found that the diffusion of water molecules in the nano-modified model was slow, and the water molecules generated from transformer insulation aging were adsorbed around the nanoparticles, which inhibited the diffusion of water molecules, reduced the hydrolysis of ester molecules, and effectively enhanced the anti-aging performance of natural ester insulating oil. Compared with two different types of nano-modified models, the interface compatibility between nano-Fe3O4 and natural ester insulating oil is better, the composite model is stable, the change rate of the diffusion coefficient with temperature is small, there are more hydrogen bonds generated by nano-Fe3O4 and water molecules, and the anti-aging performance of the nano-Fe3O4-modified oil model is better. Full article
(This article belongs to the Special Issue Functional Nano-Hybrid Insulation Materials)
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