IET Nanodielectrics最新文献

{"title":"Nano-materials for engineering application","authors":"Surajit Chattopadhyay, Bo-Xue Du, Zhi-Min Dang, George Chen","doi":"10.1049/nde2.12028","DOIUrl":"10.1049/nde2.12028","url":null,"abstract":"<p>Nano-materials have undergone tremendous advancement in recent years, specifically in the field of engineering applications. To demonstrate these advances, seven high quality articles have been presented in this Special Issue, including one review and six original research works in various fields of engineering applications.</p><p>Reference [<span>1</span>], ‘Polypropylene-based nanocomposites for high voltage direct current (HVDC) cable insulation’ (by Adnan, M. et al.), presents an excellent review of different aspects of nanomaterials used in cable insulation for HVDC applications. The review shows that nanocomposites based on polypropylene exhibit enhanced dielectric properties, making them suitable for DC high voltage applications. Electrical double-layer, multicore and multi-region structure models are used for nanocomposite materials. Different fabrication methods have been improved, such as ‘Intercalation method’, ‘Sol gel method’ and ‘In situ polymerisation’. The paper presents DC breakdown characteristics for nanofiller loading, followed by the different types and effects for different nanocomposites.</p><p>In Reference [<span>2</span>], ‘Structure for fast photonic medium on application of space-division multiplexing (SDM) communication using SiO<sub>2</sub> doped with GeO<sub>2</sub>, and F materials’ (by Behera, B. et al.), an advanced doping structure has been found suitable for applications in SDM communication for a fast photonic medium. A few-mode fibre has been introduced which shows a very small bit-error-rate, confirming the suitability of the advanced doping structure.</p><p>In Reference [<span>3</span>], ‘Nickel-cobalt-zinc ferrite nanoparticles for radio-frequency/terahertz frequency-selective surface application’ (by Arya, M. et al.), an advanced nanoparticle structure has been introduced for radio-frequency/terahertz frequency-selective surface applications. Terahertz time domain spectroscopy was used for analysis which revealed that the saturation magnetisation, remanent magnetisation and coercivity increased with an increase in temperature from 50 to 300 K.</p><p>Reference [<span>4</span>], ‘Investigation on the partial discharge characteristics of eco-friendly nanofluid insulation of corn oil nanofluid’ (by Shantha Kumar M. et al.), has revealed phase-resolved partial discharge analysis useful features of corn oil nanofluid. The oil is biodegradable in nature and, moreover, the analysis with different percentages of SiO<sub>2</sub> has shown improvements of partial discharge inception voltage, reduction of the repetition rate, equivalent time length, magnitude, lower discharge activity due to a rise in the wave shape etc. Thus, the authors have shown that it can be considered eco-friendly as well as an alternate for mineral oils.</p><p>Reference [<span>5</span>], ‘Switching transient-based state of ampere-hour prediction of lithium-ion, nickel-cadmium, nickel-metal-hydride and lead acid batteries used in vehicles’ (","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 3","pages":"81-83"},"PeriodicalIF":2.7,"publicationDate":"2021-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12028","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49589566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review of surface roughness impact on dielectric film properties","authors":"Guanghui Song,&nbsp;Yaojin Wang,&nbsp;Daniel Q. Tan","doi":"10.1049/nde2.12026","DOIUrl":"10.1049/nde2.12026","url":null,"abstract":"<p>The importance of surface roughness with respect to the bulk properties of dielectric materials is often overlooked. Surface roughness or interfaces between different material layers often significantly affects the external properties of thin films. Surface roughness holds its commonalty and critical impact among many materials properties. This review summarises the recent work on the effect of surface roughness on the mechanical, thermal, physical, and dielectric properties of dielectric films. Appropriate roughness favours adhesion, filtration, biological fouling, tribological properties, and magnetic properties. Nevertheless, lower roughness generally benefits the dielectric properties of dielectric materials, with thicknesses ranging from a few nanometres to up to 50 μm. This review discusses surface roughness control and the techniques of measurement as well. It emphasises the importance and characterisation of sample surface roughness for a better understanding of the dielectric phenomenon, mechanisms, and electrical stress test setup for various dielectric films.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"5 1","pages":"1-23"},"PeriodicalIF":2.7,"publicationDate":"2021-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43365816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-frequency measurement of dielectric permittivity and antimicrobial properties of polyaniline and graphite oxide nanocomposites","authors":"Shubha L.N.,&nbsp;ChandraBabu Putta","doi":"10.1049/nde2.12025","DOIUrl":"10.1049/nde2.12025","url":null,"abstract":"<p>The polyaniline/graphite oxide (PANI/GO) nanocomposite was prepared by the in situ chemical polymerisation method. The synthesis involved the formation of dark green coloured polyaniline/graphite oxide composite. The crystalline structure and morphology of the composite were studied using UV-visible spectroscopy (UV), X-ray diffraction (XRD) and transmission electron microscopy (TEM).The characteristic peaks in XRD and UV-visible spectra confirmed the formation of the PANI/GO nanocomposite. DC conductivity measurements were performed using a two-probe method. Dielectric responses of the composites were investigated in the frequency range100 MHz to 3 GHz by the RF impedance analyser. The dielectric constant <i>ϵ</i>′(<i>w</i>) and dielectric loss <i>ϵ</i>′′(<i>w</i>) were investigated. It was observed that the dielectric constant <i>ϵ</i>′(<i>w</i>) and dielectric loss <i>ϵ</i>′′(<i>w</i>) decreased with an increase in frequencies (for different wt % of GO). The antibacterial activity of this composite was examined.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 3","pages":"155-161"},"PeriodicalIF":2.7,"publicationDate":"2021-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49208607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy storage properties of P(VDF-TrFE-CTFE)-based composite dielectrics with uniform and gradient-doped boron nitride nanosheets","authors":"Yanan Shang,&nbsp;Yu Feng,&nbsp;Changming Li,&nbsp;Changhai Zhang,&nbsp;Tiandong Zhang,&nbsp;Yongquan Zhang,&nbsp;Yue Zhang,&nbsp;Chunhui Song,&nbsp;Qingguo Chi","doi":"10.1049/nde2.12024","DOIUrl":"10.1049/nde2.12024","url":null,"abstract":"<p>Dielectric capacitors play an important role in advanced electronic and power systems such as portable electronic devices, hybrid electric vehicles and electronic weapon systems, and the improvement of energy storage density will have a positive effect on reducing the volume and weight of equipment. Here, a series of single-layer dielectrics with boron nitride nanosheets (BNNSs) uniformly dispersed and multilayer dielectrics with BNNSs showing a positive gradient distribution (PGD) and inverse gradient distribution (IGD) in the poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) (P[VDF-TrFE-CTFE]) matrix were prepared by high-speed electrospinning and hot press technology. It is found that the best performance is observed inthe lowest interlayer gradient component in both PGD and IGD composite dielectrics. However, the performance of PGD is better than that of IGD, and the 3-5-3 multilayer dielectric in the positive gradient structure has the best electrical performance. Its maximum energy storage density of the 3-5-3 composite dielectrics is 12.93 J/cm³ at the applied electric field of 380 kV/mm. The above research results show that the gradient structure design plays an important role in optimising the breakdown strength and energy storage characteristics of composite dielectrics.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"5 1","pages":"50-61"},"PeriodicalIF":2.7,"publicationDate":"2021-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47775304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A transparent polyvinylidene fluoride–hexafluoropropylene composite film with enhanced energy conversion and energy preservation performance","authors":"Xin Wang,&nbsp;Wenjiang Wang,&nbsp;Wangshu Tong,&nbsp;Yihe Zhang,&nbsp;Zhihao Wang,&nbsp;Yuan Ma,&nbsp;Qi An","doi":"10.1049/nde2.12023","DOIUrl":"10.1049/nde2.12023","url":null,"abstract":"<p>Integrated energy-generating and storage films are able to convert mechanical force into stored electrical energy, with the potential for use in self-powered wearable electronics and flexible energy supplies. The development of a transparent metal salt/polyvinylidene fluoride–hexafluoropropylene composite film is reported that possesses excellent piezoelectric and dielectric properties and has the potential to be employed as an energy-generating and preserving integrated film. The effects of the type of the metal salt and its content on the dielectric properties, d₃₃ value, open circuit voltage, and holding time of the composite films were investigated. Owing to the presence of pure water, the <i>β</i>-phase composition and polarization of the film are increased, leading to improved energy conversion properties. Most important, the prepared film exhibits excellent light transmittance. This film, which possesses both good electrical and transparent properties, has the potential for use as a flexible energy supplier, particularly for photovoltaic devices.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 4","pages":"229-238"},"PeriodicalIF":2.7,"publicationDate":"2021-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"111278254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Greatly enhanced breakdown strength and energy density in ultraviolet-irradiated polypropylene","authors":"Jiayu Chen,&nbsp;Bao-Wen Li,&nbsp;Yi Sun,&nbsp;Pengxiang Zhang,&nbsp;Zhonghui Shen,&nbsp;Xin Zhang,&nbsp;Ce-Wen Nan,&nbsp;Shujun Zhang","doi":"10.1049/nde2.12022","DOIUrl":"10.1049/nde2.12022","url":null,"abstract":"<p>Polymer dielectrics have drawn great attentions for applications in advanced electronic devices and power grids because of their high breakdown strength, low dielectric loss, and excellent flexibility. However, the low energy density in polymer dielectric capacitors will hinder the continuous miniaturization of electrical systems. In this work, ultraviolet irradiation is demonstrated to greatly enhance the breakdown strength and energy density of polypropylene. Dramatically improved breakdown strength of 867 MV/m and discharged energy density of 8.0 J/cm³, together with the high energy efficiency of &gt;90%, were simultaneously achieved in polypropylene after ultraviolet irradiation. Our research shows that proper ultraviolet irradiation can effectively improve the energy density of polypropylene without sacrificing its high charge-discharge efficiency, being potential for applications in power electronics and pulse electric systems.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 4","pages":"223-228"},"PeriodicalIF":2.7,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12022","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"94839618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the enhanced electrorheological effect of reduced graphene oxide-supported polyaniline dielectric nanoplates by a comparative study with graphene oxide as the support core","authors":"Jinhua Yuan,&nbsp;Yudong Wang,&nbsp;Liqin Xiang,&nbsp;Xiaopeng Zhao,&nbsp;Jianbo Yin","doi":"10.1049/nde2.12021","DOIUrl":"10.1049/nde2.12021","url":null,"abstract":"<p>Graphene has attracted scientific interest as a substrate or additive for developing high-performance stimuli-responsive materials. Research on graphene-based polymer dielectric composites has shown an enhanced electroresponsive electrorheological (ER) effect. However, the mechanism behind the enhanced electroresponse is still incompletely understood. Here, an investigation was performed into dielectric polarization and the ER effect of reduced graphene oxide-supported polyaniline nanoplates by comparing them with pure granular polyaniline and graphene oxide-supported polyaniline nanoplates based on dielectric spectroscopy and rheologic analysis. We discovered that both anisotropic morphology and electrical properties have dominant roles in the enhanced ER effect of reduced graphene oxide-supported polyaniline nanoplates, whereas only anisotropic morphology has a dominant role in the enhanced ER effect of graphene oxide-supported polyaniline nanoplates. The analysis also showed that reduced graphene oxide-supported polyaniline nanoplates have a good ER response to both DC and AC electric field actions in the wide shear rate region. This is highly desirable for practical engineering applications. Therefore, the analysis reveals the reason for the enhanced ER effect of reduced graphene oxide-supported polyaniline nanoplates and also may provide a guide for designing high-performance ER materials for practical engineering applications by combining the advantages of conducting a reduced graphene oxide core and ER active shell.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 3","pages":"143-154"},"PeriodicalIF":2.7,"publicationDate":"2021-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49666416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation on the partial discharge characteristics of eco-friendly nanofluid insulation of corn oil nanofluid","authors":"Shantha Kumar M,&nbsp;Kasi Viswanathan P,&nbsp;Shree Kumar H","doi":"10.1049/nde2.12020","DOIUrl":"10.1049/nde2.12020","url":null,"abstract":"<p>The suitability of corn oil nanofluid as an insulation material is studied herein by analysing the partial discharge characteristics. Experiments are conducted on nano-silica modified corn oil at 0.01, 0.05, and 0.1 wt.% mass fractions. Electrode configurations are used to generate partial discharge (PD) sources such as corona discharge, internal discharge, and surface discharge. Partial discharge inception voltage dependency on electrode geometry is studied. Phase-resolved partial discharge analysis (PRPD) at various test conditions is done to understand the influence of live element geometry that causes PD in real-time operations, Weibull statistical analysis of PD parameters like scale parameter, shape parameter, skewness, and repetition rate is evaluated to understand the influence of nanofiller mass fraction in corn oil. The results illustrate that the addition of silica nanoparticles to corn oil has a significant influence on PD characteristics. The PRPD pattern analysis reveals information about the PD dependency on electrode configuration of the test condition. The addition of nanofillers in optimal concentrations without agglomeration can influence the PD characteristics to a certain degree. The test results may be inferred to suggest corn oil-based silica nanofluids as an alternative biodegradable liquid insulation.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 3","pages":"130-142"},"PeriodicalIF":2.7,"publicationDate":"2021-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47991596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrical discharge resistance of polymeric nanocomposites","authors":"Srijib Banerjee,&nbsp;Shelly Saini,&nbsp;Shakthi Prasad D","doi":"10.1049/nde2.12019","DOIUrl":"https://doi.org/10.1049/nde2.12019","url":null,"abstract":"<p>The trend of choosing insulating materials has changed in the past few decades, and a considerable shift has occurred from conventional ceramic to non-ceramic insulating materials. The addition of inorganic fillers has greatly improved the thermal conductivity, discharge resistance, hydrophobicity recovery, and vandalism-resistance properties of polymeric insulating materials. Since the beginning of the present century, the field of nanomaterial research has gained much attention. Several studies have been conducted to investigate and analyze polymer nanocomposites by adding nanoparticles of varying size and concentration as fillers. The aim is to improve the characteristics and reformation of thermal, electrical, and mechanical properties of existing polymeric insulation materials. However, certain inconsistencies are prevalent with results obtained for polymer nanocomposites. A comprehensive review is presented based on available literature focussing on the advancement from polymeric insulating materials to polymeric nanocomposites and its impact on partial discharge resistance, surface charging, and tracking and erosion resistance. It is observed that the weight percent and dispersion of nano- or micro-sized particles into the base polymer matrix governs the performance of polymer composites. At higher filler loading, resistance to partial discharge and tracking and erosion decreases as a result of the agglomeration of fillers, whereas resistance to surface charge accumulation increases at higher filler loading because the formation of shallow traps increases the charge decay rate. It is suggested that when both micro- and nanofillers are mixed in proper proportion, micro–nano hybrid composites provide better performance than composites filled with only nano- or microfillers.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 4","pages":"210-222"},"PeriodicalIF":2.7,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137801478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polypropylene-based nanocomposites for HVDC cable insulation","authors":"Muhammad Adnan,&nbsp;Zulkurnain Abdul-Malek,&nbsp;Kwan Yiew Lau,&nbsp;Muhammad Tahir","doi":"10.1049/nde2.12018","DOIUrl":"10.1049/nde2.12018","url":null,"abstract":"<p>Cross-linked polyethylene (XLPE) is commonly used as an insulation material in power cables. Due to the recent advancements in the field of high voltage power transmission and distribution, there is a need for novel cable insulation materials that have high performance, recyclability and high working temperature as alternatives for the conventional XPLE-based insulation materials. Polypropylene (PP) shows excellent properties and has drawn considerable attention as a potential high voltage direct current (HVDC) insulation material. Therefore, the development of PP-based HVDC cable insulation with improved electrical, thermal and mechanical properties is important in discovering a potentially recyclable cable insulation material. Due to the remarkable development in the field of nanodielectrics, nanotechnology can be a promising solution for enhancing the overall dielectric properties of PP-based insulation materials. This review presents the important aspects of PP-based nanocomposites for HVDC cable insulation with a special focus on understanding the effects of various parameters of nanofillers on the dielectric properties of PP-based HVDC cable insulation. Based on the gathered information, future perspectives for improving the dielectric properties of PP-based nanocomposites for HVDC cable are provided.</p>","PeriodicalId":36855,"journal":{"name":"IET Nanodielectrics","volume":"4 3","pages":"84-97"},"PeriodicalIF":2.7,"publicationDate":"2021-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/nde2.12018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46476070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}