The Dielectric Properties Improvement of Cable Insulation Layer by Different Morphology Nanoparticles Doping into LDPE

Guang, Yu; Cheng, Yujia; Zhang, Xiaohong

doi:10.3390/coatings9030204

Cited by 13 publications

(11 citation statements)

References 24 publications

(24 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was consistent with the study results of Dissado and Forthergill [7][8][9][10]. From the correlation research, nanoparticle doping could improve the dielectric properties of polymers effectively [11][12][13][14]. Therefore, a number of metal oxides were added into the polymers such as low-density polyethylene, epoxy resin and polypropylene.…”

Section: Introductionsupporting

confidence: 84%

Effect of Nano-MgO Particles Doping on Breakdown Characteristics of Polypropylene

Guang

Cheng

2020

Coatings

Self Cite

View full text Add to dashboard Cite

In this article, the nano-MgO particles were used as inorganic fillers, and polypropylene (PP) polymer was used as a matrix. The nano-MgO/PP composites were prepared by double melt blending. Using the polarization microscope (PLM) test and hot-stage microscope test, the crystalline morphology of PP and nano-MgO/PP with different mass fraction were observed. Using the differential scanning calorimetry (DSC) test, the parameters and crystallinity in the process of isothermal crystallization could be obtained. Additionally, the samples of pure PP and nano-MgO/PP composites were dealt with using a breakdown test and a dielectric frequency spectra test. From the experimental results, nano-MgO particle doping decreased the samples’ crystal size, and the crystalline structure was converted from large spherulites to fascicled crystallization. Additionally, the crystallization rate became fast and crystallinity increased. According to the breakdown test, the nano-MgO particle doping made the composites form small, dense spherulites. The breakdown developed through a longer path, so the composites’ breakdown strength rose greatly. When the mass fraction of nano-MgO particles was 3%, the shape parameter of the composites’ Weibull distribution β was larger, which illustrated that the nano-MgO particles were dispersed uniformly in the PP matrix. According to the dielectric frequency spectra test, the dielectric constant of different nanocomposites were all lower than which of pure PP, but the loss angle tangent values were all higher than which of pure PP.

show abstract

Section: Introductionsupporting

confidence: 84%

Effect of Nano-MgO Particles Doping on Breakdown Characteristics of Polypropylene

Guang

Cheng

2020

Coatings

Self Cite

View full text Add to dashboard Cite

show abstract

“…The organic and inorganic group existed in the coupling agent simultaneously, the nanoparticle surface could be covered by coupling agent with a physical and chemical reaction. The purpose of inorganic particles modification was realized, and the ZnO particles after surface modification could be combined with polymer matrix better [20].…”

Section: Preparation Of Compositesmentioning

confidence: 99%

The Research of Crystalline Morphology and Breakdown Characteristics of Polymer/Micro-Nano-Composites

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this article, low-density polyethylene (LDPE) was used as a matrix polymer, the Micro-ZnO and Nano-ZnO particles were used as the inorganic filler. With the melt blending method, the Nano-ZnO/LDPE(Nano-ZnO particles doping into LDPE), Micro-ZnO/LDPE(Micro-ZnO particles doping into LDPE) and Micro-Nano-ZnO/LDPE (Nano-ZnO and Micro-ZnO particles doping into LDPE in the same time) composites were prepared. Then, the inorganic filler and the composites were dealt with structural characterizations and analysis by Fourier transform infrared (FTIR), Polarization microscope (PLM), and Differential scanning calorimeter (DSC). Besides, these samples were dealt with (alternating current) AC breakdown performance test. The micro-experimental results showed that the Micro-ZnO and Nano-ZnO particles doping reduced the crystal size and increased the crystallization rate. With the change of cell structure, the crystallinity of composites increased. The crystallinity order of different samples was as follows: LDPE < Micro-ZnO/LDPE < Nano-ZnO/LDPE < Micro-Nano-ZnO/LDPE. From the breakdown of the experimental result, with the same mass fraction of the different inorganic doping of particles, the breakdown strength of these composites was different. The Nano-ZnO particle doping could improve the breakdown strength of composites effectively. Among them, the breakdown strength of Nano-ZnO/LDPE and Micro-Nano-ZnO/LDPE were 11% higher and 1.3% lower than that of pure LDPE, respectively. Meanwhile, the breakdown strength of Micro-composite was the lowest but its Weibull shape coefficient was the highest. Therefore, the Micro-ZnO doping was helpful for the Nano-ZnO dispersing in the matrix, which produced the Micro-Nano-synergy effects better.

show abstract

“…In Formula (1), ∆H m was the melting enthalpy; H 0 was the material melting enthalpy in fully crystallization, of which PE was 293.6 J/g (calibration in experimental instrument); ω was the ZnO mass fraction of composites [17].…”

Section: Structure Characterization Of Different Samplesmentioning

confidence: 99%

The Research of Interface Microdomain and Corona-Resistance Characteristics of Micro-Nano-ZnO/LDPE

Cheng

Guang

2020

Polymers

Self Cite

View full text Add to dashboard Cite

In this article, the melting blend was used to prepare the Micro-ZnO/LDPE, Nano-ZnO/LDPE and Micro-Nano-ZnO/LDPE with different inorganic particles contents. The effect of Micro-ZnO and Nano-ZnO particles doping on interface microdomain and corona-resistance breakdown characteristics of LDPE composite could be explored. Based on the energy transfer and heat exchange theory of energetic electrons, the inner electrons energy transfer model of different ZnO/LDPE composites was built. Besides, the microstructure and crystalline morphology of inorganic ZnO-particles and polymer composites were detected by SEM, XRD, FTIR, PLM and DSC test, and the AC breakdown and corona-resistance breakdown characteristics of composites could be explored. From the experimental results, the Nano-ZnO particles after surface modification dispersed uniformly in LDPE matrix, and the nanoparticles agglomeration almost disappeared. The inorganic particles doping acted as the heterogeneous nucleation agent, which improved the crystallization rate and crystallinity of polymer composites effectively. The ZnO particles with different size doping constituted the different interface structure and crystalline morphology, which made different influence on composites macroscopic properties. When the Nano-ZnO particle size was 40nm and the mass fraction was 3%, the breakdown field strength of Nano-ZnO/LPDE was the highest and 15.8% higher than which of pure LDPE. At the same time, the shape parameter β of Micro-Nano-composite was the largest. It illustrated the microparticles doping reduced the probability of nanoparticles agglomeration in matrix. Besides, both Micro-ZnO and Micro-Nano-ZnO particles doping could improve the ability of corona corrosion resistance of LDPE in varying degrees. The corona-resistant breakdown time order of four samples was as follows: LDPE < Micro-ZnO/LDPE < Nano-ZnO/LDPE < Micro-Nano-ZnO/LDPE. When the mass fraction of Micro-ZnO and Nano-ZnO particles was 2% and 3% respectively, the corrosion depth and area of Micro-Nano-ZnO/LDPE was the least, and the ability of corona corrosion resistance was the strongest.Polymers 2020, 12, 563 2 of 17 of the power system. Therefore, how to improve the long-term dielectric properties of polythene insulation has become urgent to solve [1][2][3][4]. Research showed that the conventional polymer/inorganic Micro-composites possessed excellent thermal conductivity and thermal blocking effect. Besides, the effect of electrical corrosion resistance was obvious. For the nanoparticles doping, it could improve many electrical properties of polymers such as partial discharge resistance, electrical treeing resistance, corona aging resistance and space charge accumulation restraint [5][6][7]. Therefore, a new composite material combining both of these advantages was our aim to find out.On this account, the Micro-Nano-composite technology was used to regulate and control the interface bonding state between the polymer and inorganic Micro-Nano-particles. Then the mesoscopic morphology of composites wa...

show abstract

The Dielectric Properties Improvement of Cable Insulation Layer by Different Morphology Nanoparticles Doping into LDPE

Cited by 13 publications

References 24 publications

Effect of Nano-MgO Particles Doping on Breakdown Characteristics of Polypropylene

Effect of Nano-MgO Particles Doping on Breakdown Characteristics of Polypropylene

The Research of Crystalline Morphology and Breakdown Characteristics of Polymer/Micro-Nano-Composites

The Research of Interface Microdomain and Corona-Resistance Characteristics of Micro-Nano-ZnO/LDPE

Contact Info

Product

Resources

About