Article
Engineering, Electrical & Electronic
Yao Zhou, Yujie Zhu, Chao Yuan, Qi Li, Xiangdong Xu, Yuriy Serdyuk, Qing Wang, Jinliang He
Summary: This study improves the high-temperature insulation properties of polypropylene-based nanocomposites by modulating the polymer/nanoparticle interfaces, providing new opportunities for designing high-performance recyclable insulation materials for HVdc cables.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Energy & Fuels
Chong Zhang, Zhaoliang Xing, Xin Chen, Shaowei Guo, Hongbo Liu, Lu Cheng, Wenfeng Liu
Summary: This study focuses on enhancing the energy storage density of polypropylene (PP) using glycidyl methacrylate (GMA) and nano ZrO2 doping. The results show that the ternary system of PP/nano ZrO2/PP grafted GMA achieves high energy storage density and low dielectric loss. Grafting GMA introduces deep traps, but the ternary system partially avoids excessive deep traps.
Article
Materials Science, Textiles
Madhavi Sridhar, Raju Nama Vasudeva Setty, Jobish Johns
Summary: The study focuses on the electrical properties of blends from Polypropylene (PP) and bamboo fiber, aiming to achieve high dielectric constant and low loss in polymer composites for embedded capacitor applications. Special attention is paid to the influence of coupling agent on the dielectric properties of the resulting composites.(AdapterView) Polypropylene is chosen as the host matrix due to its higher mechanical strength and ease of processing at low temperatures.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Composites
Xiaodong Gao, Weimin Yang, Jing Tan, Lijian Song, Lisheng Cheng, Xiaolong Tian
Summary: This article introduces a study on the fabrication of new composite materials by hybridizing conductive nanocarbon-coated glass fibers with polymers. The results show that the composite material has good electrical conductivity and thermal conductivity, making it suitable for applications such as electromagnetic shielding.
POLYMER COMPOSITES
(2022)
Article
Polymer Science
Nicoleta-Violeta Stanciu, Felicia Stan, Ionut-Laurentiu Sandu, Catalin Fetecau, Adriana-Madalina Turcanu
Summary: This paper investigated the material properties of polypropylene (PP) nanocomposites filled with multi-walled carbon nanotubes (MWCNTs) and found that the addition of MWCNTs affects the melt shear viscosity, specific volume, thermal conductivity, mechanical properties, and electrical properties of the materials. The study revealed that increasing MWCNT loading results in higher melt shear viscosity, lower specific volume, thermal conductivity below 0.35 W/m·K, and the nanocomposite becomes electrically conductive at 3 wt.% loading.
Article
Chemistry, Multidisciplinary
Eugene B. B. Yakimov, Alexander Y. Y. Polyakov, Vladimir I. I. Nikolaev, Alexei I. I. Pechnikov, Mikhail P. P. Scheglov, Eugene E. E. Yakimov, Stephen J. J. Pearton
Summary: This study investigates the properties of orthorhombic kappa-Ga2O3 films prepared using Halide Vapor Phase Epitaxy (HVPE) on AlN/Si and GaN/sapphire templates. The formation of two-dimensional hole layers and the suppression of rotational nanodomains are studied. Good rectifying characteristics of Ni Schottky diodes are observed in thick kappa-Ga2O3 films grown on GaN/sapphire. The presence of deep electron traps near E-c - 0.3 eV and E-c - 0.7 eV is found in the uppermost layer of the grown kappa-Ga2O3 films, resulting in relatively high series resistance.
Article
Engineering, Electrical & Electronic
Ai Ling Pang, Muhamad Rasyidi Husin, Agus Arsad, Mohsen Ahmadipour
Summary: In this study, recycled polypropylene/polyaniline/graphene nanoplatelets (rPP/PANI/GNPs) nanocomposites were fabricated using an ultrasonic-assisted single-screw extruder. The effects of different GNPs loadings on the properties of the nanocomposites were systematically evaluated, showing that incorporating 3 phr GNPs could enhance the electrical conductivity of the nanocomposites.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Polymer Science
Dashan Mi, Zhongguo Zhao, Haiqing Bai
Summary: The orientation and dispersion of nanoparticles greatly affect the conductivity and mechanical properties of nanocomposites. This study investigates the influence of different molding methods and shear conditions on the dispersion and orientation of carbon nanotubes (CNTs) in polypropylene/CNTs nanocomposites. It is found that high dispersion of CNT agglomerates hinders the formation of a conductive network, while increased orientation of CNTs results in current only flowing in the orientation direction.
Article
Materials Science, Composites
Xujing Yang, Zhiwei Yu, Wenjun Fang, Zhong Wan, Qi Qian, Weiwei Li, Haowen Jiao, Jinzhi Li, Jiangyan Chang, Qing Li
Summary: This study investigates the development of antistatic PP composites using Li-TFSI. It reveals that the polar effect of Li-TFSI promotes the formation of conductive tracks, while heterogeneous nucleation enhances the nucleation and crystal growth of PPR chains. The addition of Li-TFSI reduces the interface strength but increases the modulus.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Manufacturing
Zilong Xie, Rui Xue, Zhengli Dou, Lingyi Xiao, Yuhang Li, Qin Zhang, Qiang Fu
Summary: By exfoliating boron nitride in liquid metal and using it as hybrid fillers without separation, polypropylene composites with enhanced dielectric constant and thermal conductivity were successfully fabricated. The composites exhibit excellent performance while maintaining low dielectric loss and low conductivity of the polypropylene.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Electrical & Electronic
Xiaosi Lin, Wah Hoon Siew, John Liggat, Martin Given, Jinliang He
Summary: The study shows that the addition of OvPOSS nanofillers can significantly enhance the electrical performance of polypropylene, leading to reduced DC conductivity, increased breakdown strength, and suppressed space charge accumulation. Therefore, OvPOSS/PP nanocomposites have great potential for HVDC applications.
Review
Materials Science, Composites
Uwa O. Uyor, Patricia A. Popoola, Olawale M. Popoola, Victor S. Aigbodion
Summary: Polypropylene (PP) is widely used in engineering applications, but lacks desired thermal properties and mechanical strength. The incorporation of carbon nanotubes (CNTs) in the PP matrix has improved its engineering properties while retaining its lightweight and flexibility. Despite challenges, the development of PP-CNTs composites shows promising advancements and has important industrial applications.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Thermodynamics
Qiunan Chen, Ting Sai, Zhengping Fang, Zhenghong Guo
Summary: The study successfully prepared C-60-decorated MMT hybrid by connecting fullerene to montmorillonite, and the resulting composites showed enhanced thermal stability and oxidative resistance in the PP matrix.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Materials Science, Multidisciplinary
Natalia Prorokova, Svetlana Vavilova
Summary: This paper presents an original method for forming a stable coating on a polypropylene yarn, providing it with barrier antimicrobial properties, reducing electrical resistance, increasing strength, and achieving high chemical resistance. The method involves forming an ultrathin, continuous, and uniform coating on the surface of each filament at the melt-spinning stage of the yarn.
Article
Polymer Science
Zhifeng Wang, Jun Tong, Wei Li, Haichen Zhang, Manfeng Hu, Haichu Chen, Hui He
Summary: In this study, polypropylene/graphite intercalation compound (PP/GIC) composites were prepared at different temperatures through melt mixing, demonstrating improved dispersion and performance at higher temperatures, suggesting potential applications.
Review
Chemistry, Multidisciplinary
Yao Zhou, Li Li, Zhubing Han, Qi Li, Jinliang He, Qing Wang
Summary: This review provides an update on the applications of self-healing polymers in electronics and energy devices. The differences in fundamental mechanisms and healing strategies between mechanical fracture and electrical breakdown of polymers are highlighted. The advantages and limitations of current approaches to self-healing polymer devices are summarized, and challenges and future research opportunities are discussed.
Article
Engineering, Electrical & Electronic
Yao Zhou, Yujie Zhu, Chao Yuan, Qi Li, Xiangdong Xu, Yuriy Serdyuk, Qing Wang, Jinliang He
Summary: This study improves the high-temperature insulation properties of polypropylene-based nanocomposites by modulating the polymer/nanoparticle interfaces, providing new opportunities for designing high-performance recyclable insulation materials for HVdc cables.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Automation & Control Systems
Jiashu Fang, Kunjin Chen, Chongru Liu, Jinliang He
Summary: Machine learning-based integrated model for fault diagnosis on transmission lines is proposed in this study, demonstrating improved performance over separate models. The explainability and robustness of the proposed model are analyzed using class activation maps and attention maps. The proposed model outperforms existing machine learning-based models in terms of accuracy and robustness, making it applicable to various fault diagnosis tasks.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Review
Engineering, Electrical & Electronic
Amedeo Andreotti, Rodolfo Araneo, J. Brandao Faria, Jinliang He, Emanuel Petrache, Antonio Pierno, Erika Stracqualursi
Summary: The ability of shield wires to mitigate lightning-induced overvoltages in overhead lines has been extensively researched. However, previous studies have yielded conflicting results and there is a lack of clarity on the role of different parameters involved. This paper aims to fill this gap by proposing a new approach to quantify the mitigation effect and applying it to more realistic cases.
IEEE TRANSACTIONS ON POWER DELIVERY
(2023)
Article
Nanoscience & Nanotechnology
Jiaye Xie, Lu Han, Zhen Luo, Qi Li, Jinliang He
Summary: In this study, a self-healing method for electrical tree damage based on radical chain polymerization is demonstrated, which is initiated by in situ radicals generated during electrical aging. Acrylate monomers contained in microcapsules will flow into hollow channels and autonomously polymerize to heal the damaged regions, triggered by radicals resulting from polymer chain scissions. The optimized self-healing epoxy resins showed effective recovery from treeing in multiple aging-healing cycles, highlighting the potential of this method for autonomous healing of tree defects without the need to switch off operating voltages. This novel self-healing strategy has broad applicability and online healing competence.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Chao Yuan, Dong-Duan Liu, Yu-Jie Zhu, Tan Zeng, Bing-Xu Jiang, Cheng-Xu Tang, Yao Zhou, Jin-Liang He, Qi Li
Summary: This paper reports on the interaction between organic molecular semiconductors and polypropylene, which can effectively modulate the electrical properties of polypropylene. This is crucially important for environmentally friendly high voltage direct current cable insulation.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Zhikang Yuan, Gang Sun, Zhiwen Huang, Jun Hu, Jinliang He
Summary: Bushings in HVdc projects play a crucial role in providing insulation and physical support for high-voltage conductors. However, the harsh operational conditions, such as high electric field and load current, pose significant challenges to their long-term reliability. With the ongoing construction of extra-HVdc and flexible dc transmission projects, the demand for HVdc bushings is growing rapidly. For example, China alone requires thousands of transformer bushings and wall bushings for ultra-HVdc and valve halls, representing a market scale worth billions of CNY annually.
IEEE POWER & ENERGY MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Xiao Yang, Shaojie Wang, Xiaolei Zhao, Zhiwen Huang, Qi Li, Jun Hu, Jinliang He
Summary: This article investigates the performance and reliability of nonlinear dielectrics with self-adaptive electrical parameters (SADs) for field grading and stress control in key parts of high-voltage apparatus. The nonlinearity of SADs under various electrical-thermal excitations is studied, and the mechanism behind the effects is analyzed. The thermal stability of the composites is discussed, considering the influences of filler and polymer matrix property, and suggestions for field grading and material design are proposed.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Engineering, Electrical & Electronic
Lu Han, Jiaye Xie, Qi Li, Jinliang He
Summary: The stability and population of radicals in aged epoxy resins with different electrical trees are investigated using electron paramagnetic resonance (EPR). The mobility of polymer chains is found to be a crucial factor for stability, as it affects the recombination of radicals and their lifetime. Radicals are identified as precursors of electrical trees, and the generation of different radicals is observed as tree size increases. The radical population in bush trees is smaller than in branch trees due to lower electrical stress at the branch tips and slower degradation of polymer chains.
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
(2023)
Article
Engineering, Electrical & Electronic
Zhuoran Liu, Yunguang Cui, Bo Zhang, Jinliang He
Summary: The operation of SF6 gas-insulated switchgear (GIS) can cause fast transient overvoltage, which may interfere with the secondary system through various paths. This paper conducted on-site measurements on the electromagnetic interference (EMI) in the secondary system during the operation of a 500 kV GIS. The effects of different interference paths, such as spatial electromagnetic coupling and grounding system, were analyzed by simultaneously measuring the electric field in space, the current through the grounding lead of the GIS, the EMI in the cables with different grounding methods, and the transient ground potential difference between the cabinet and the control center. The results show that the EMI is determined by the spatial electric field and current in the shielding when the shielding of the cable is grounded at both ends, and the core-shielding voltage contains stronger high frequency components when the cable is grounded with single end.
IEEE TRANSACTIONS ON POWER DELIVERY
(2023)
Article
Physics, Applied
Penglong He, Yuxin Liu, Bo Zhang, Jinliang He
Summary: Under divergent electric fields, space charge accumulation controls insulation degradation phenomena. Existing measurement methods are not directly applicable. This paper proposes a method combining experiment and simulation to evaluate space charge distribution around a needle electrode.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Bo Zhang, Chaoran Li, Zhuoran Liu, Jinliang He
Summary: In this article, the author develops a grounding grid circuit model that takes into account the mutual inductance between the secondary cable and the ground conductor. A circuit model of the secondary cable is also established, considering the uneven ground potential distribution and the mutual inductance between the cable and the ground conductor. The two models are then unified to calculate the transient disturbance in the secondary cable caused by a lightning strike on the grounding grid. The feasibility of the method is verified through experiments, and the effect of the ground potential difference and mutual induction between the cable and the grid is analyzed. The results show that both the mutual inductance and the uneven ground potential distribution greatly affect the transient disturbance in the secondary cable.
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY
(2023)
Article
Engineering, Electrical & Electronic
Zherui Cui, Bo Zhang, Chaoying Fang, Shaokang Chen, Zhizhong Li, Zhaohua Zhang, Jinliang He, Wusiman Zaimuran
Summary: A field test on a 220 kV transmission line was conducted to obtain the characteristics of lightning current shunting. The test results were compared with simulation results, confirming the feasibility of commonly used simulation models. The main influencing factors of shunting were discussed. The results showed significant changes in the tower current compared to the applied impulse current, with high frequency components entering the tower, resulting in a steeper current waveform. This difference was closely related to the waveform of the applied impulse current, with slower waveforms causing larger differences between the tower current and the original impulse current. Although some current flows along the ground wires, this phenomenon may pose higher requirements for the tower grounding device.
IEEE TRANSACTIONS ON POWER DELIVERY
(2023)
Article
Physics, Fluids & Plasmas
Quanxin Li, Guohua Yang, Jun Xu, Jinliang He
Summary: In this article, the authors analyze the characteristics of the electric fields of the lightning M-component, focusing on the inclination of the lightning channel. The results demonstrate that the inclination angle, azimuth angle, and current decay significantly affect the response of the M-component electric fields.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
