Effect of hybrid-SiO2 particles on characterization of EPDM and silicone rubber composites for outdoor high-voltage insulations

2017 ◽  
Vol 37 (7) ◽  
pp. 671-680 ◽  
Author(s):  
Hidayatullah Khan ◽  
Muhammad Amin ◽  
Muhammad Yasin ◽  
Muhammad Ali ◽  
Ayaz Ahmad
Keyword(s):  
High Voltage ◽  
Silicone Rubber ◽  
Hybrid Composites ◽  
Standard Procedure ◽  
Research Work ◽  
Dielectric Strength ◽  
Hybrid Silica ◽  
Roll Mill ◽  
Thermal And Electrical Properties

Abstract Ethylene propylene diene monomer (EPDM) and silicone rubber (SiR) are well-known polymers for high-voltage (HV) outdoor applications. In this research work, the effect of hybrid SiO2 (a mixture of 15% microsized and 5% nanosized silica) has been investigated on the mechanical, thermal, and electrical properties of EPDM and SiR composites. Using the ASTM standard procedure, the EPDM and SiR composites filled with hybrid silica were compounded by two roll mill and simple blending techniques, respectively. It was observed that with the addition of hybrid SiO2, the composites exhibited improved tensile strength of ~2500 kPa, reduced elongation at break, and enhanced hardness. The samples filled with SiR hybrid silica showed higher thermal stability and volume/surface resistivities relative to EPDM hybrid composites. However, EPDM hybrid composites showed higher dielectric strength of ~23.4 kV/mm as compared with SiR composites. From these characterization results, it can be suggested that SiR hybrid composites are more suitable for outdoor HV insulation applications.

scholarly journals Preparation and characterization of EPDM-silica nano/micro composites for high voltage insulation applications

2015 ◽  
Vol 33 (1) ◽  
pp. 213-219 ◽  
Author(s):  
Muhammad Ali ◽  
Muhammad Ahmad Choudhry
Keyword(s):  
Electrical Properties ◽  
High Voltage ◽  
Dielectric Strength ◽  
Mechanical And Thermal Properties ◽  
Roll Mill ◽  
Thermal And Electrical Properties ◽  
High Voltage Insulation ◽  
Polymer Insulators ◽  
The Comparative Study

AbstractThe rising market for substitute materials in high voltage insulation components is stimulated largely by the need to reduce overall costs. In this respect, polymer insulators offer significant advantages over old traditional materials. In the present research, efforts have been made to quantify the effect of silica (having different particle size nano, micro and hybrid) loading on the mechanical and thermal behaviors of Ethylene-Propylene-Diene Monomer (EPDM) based high voltage electrical insulations. The fabricated composites were subjected to mechanical, thermal and electrical properties measurements. The results of dielectric strength, surface and volume resistivities showed that all composites had insulator properties, while their mechanical and thermal properties improved considerably. EPDM was compounded with different types of silica in a two roll mill using sulphur cure system. The outcome achieved from the comparative study revealed that the EPDM nanocomposites had enhanced mechanical, thermal and electrical properties even at 5 % loadings.

scholarly journals Characteristics of Silicone Composites for High Voltage Insulations

2018 ◽  
Vol 56 (1) ◽  
pp. 91-123 ◽  
Author(s):  
Hidayatullah Khan ◽  
Muhammad Amin ◽  
Ayaz Ahmad
Keyword(s):  
High Voltage ◽  
Silicone Rubber ◽  
Water Immersion ◽  
Research Work ◽  
Volume Resistivity ◽  
Dielectric Strength ◽  
Review Article ◽  
Base Polymer ◽  
Comprehensive Survey ◽  
Term Performance

AbstractSilicone rubber (SiR) composites have been widely used for high voltage (HV) electrical and non-electrical applications for the last three decades. To increase the long-term performance of SiR composites under diverse environmental, mechanical and electrical stresses; detailed characterization and aging analysis is required. This review article presents a comprehensive survey on SiR composites that are used in HV applications. Particular emphasis is on silicon (Si) applications, chemistry, polymerization, silicone rubber properties enhancement by addition of fillers, composite materials, engineering requirements of polymer insulants, overview of high voltage (HV) electrical insulators and their aging. In addition, this review article includes appropriate discussions concerning the influence of fillers (micro/nano-sized) on the physical, thermal, mechanical and electrical properties of base polymer. Tensile strength, elongation at break, hardness, thermal degradation, dielectric strength, surface resistivity, volume resistivity, tracking/erosion resistance, partial discharge and water immersion resistance of SiR composites are analyzed. Finally, it was inferred that in order to diversify the SiR blends with micro/nano fillers and optimize their properties for particular applications further research work must be conducted.

An overview: characterization of natural fiber reinforced hybrid composites

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
M. Balasubramanian ◽  
Thozhuvur Govindaraman Loganathan ◽  
R. Srimath
Keyword(s):  
Natural Fiber ◽  
Hybrid Composites ◽  
Low Cost ◽  
Research Work ◽  
Tensile Modulus ◽  
Fiber Reinforced ◽  
Content Type ◽  
Specific Strength ◽  
Wide Range

Purpose The purpose of this study is to understand the behavior of hybrid bio-composites under varied applications. Design/methodology/approach Fabrication methods and material characterization of various hybrid bio-composites are analyzed by studying the tensile, impact, flexural and hardness of the same. The natural fiber is a manufactured group of assembly of big or short bundles of fiber to produce one or more layers of flat sheets. The natural fiber-reinforced composite materials offer a wide range of properties that are suitable for many engineering-related fields like aerospace, automotive areas. The main characteristics of natural fiber composites are durability, low cost, low weight, high specific strength and equally good mechanical properties. Findings The tensile properties like tensile strength and tensile modulus of flax/hemp/sisal/Coir/Palmyra fiber-reinforced composites are majorly dependent on the chemical treatment and catalyst usage with fiber. The flexural properties of flax/hemp/sisal/coir/Palmyra are greatly dependent on fiber orientation and fiber length. Impact properties of flax/hemp/sisal/coir/Palmyra are depended on the fiber content, composition and orientation of various fibers. Originality/value This study is a review of various research work done on the natural fiber bio-composites exhibiting the factors to be considered for specific load conditions.

scholarly journals Comparative Study of the Electrical, Thermal and Mechanical properties of Polypyrrole/CB/and Copper nano powder reinforced Polyester Hybrid Composites

2021 ◽  
Author(s):  
Sumaira Nosheen ◽  
Syed Hussain Abidi ◽  
Quratulain Syed ◽  
Muhammad Irfan ◽  
Farzana Habib ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hybrid Composite ◽  
In Situ Polymerization ◽  
Hybrid Composites ◽  
Research Work ◽  
High Rate ◽  
Measured Quantity ◽  
Nano Powder

Abstract The present research work based on Synthesis and characterization of Polypyrrole coated CB (carbon black), Copper, and VGCNF (vapor grown carbon nanofibers) hybrid composite. Two approaches were used comprising in situ polymerization of Polypyrrole/CB composite. The resulting composite was dispersed in with the measured quantity of Cu nano Powder and VGCNF in polyester at very high rate of dispersion to produced hybrid composite. The resulting composites were characterized by FTIR, electrical conductivity, mechanical properties, thermal analysis and UV visible spectroscopy.

Evaluation of Thermal and Electrical Properties of Nano-Enhanced PCM for Usage in High-Voltage Systems

2019 ◽  
Author(s):  
Ange-Christian Iradukunda ◽  
Josh Kasitz ◽  
Fernando Moreno ◽  
David Huitink
Keyword(s):  
Thermal Properties ◽  
High Voltage ◽  
Phase Change Materials ◽  
Heat Removal ◽  
Dielectric Strength ◽  
Electronic Packages ◽  
Iron Oxide Particles ◽  
Rapid Temperature ◽  
Thermal And Electrical Properties ◽  
Oxide Particles

Abstract Rapid temperature transients sustained during operation of high voltage electronics can be difficult to manage by relying solely on uniform heat removal mechanisms. Phase Change Materials (PCMs) can be useful as a buffer against these intermittent temperature spikes when integrated into electronic packages. However, their integration poses challenges of both physical and electrical interactions within the package, particularly in high voltage systems. The present study aims to evaluate electrical and thermal properties of nano-enhanced PCMs to inform integration in high voltage systems. The nanocomposites are obtained by seeding 0.0006–0.12 wt% of Gold, Graphene Oxide, and Iron Oxide particles to Sorbitol. Improvements in thermal properties including latent heat as high as 15% are observed; however, this comes at the expense of dielectric strength of the PCM.

scholarly journals Biodegradable Sansevieria cylindrica Leaves Fiber/Tamarind Fruit Fiber Based Polymer Hybrid Composites on Characterization

2014 ◽  
Vol 39 ◽  
pp. 116-128 ◽  
Author(s):  
G. Reddy ◽  
M. Ashok Kumar ◽  
Jarugala Jayaramudu
Keyword(s):  
Cross Sections ◽  
Hybrid Composites ◽  
Dielectric Strength ◽  
Decomposition Temperature ◽  
Sem Analysis ◽  
Epoxy System ◽  
Fiber Loading ◽  
Polymer Hybrid ◽  
Tga And Dsc

This paper deals with the preparation and characterization of epoxy tamarind fruit (Tf) and Sansevieria cylindrica (Sc) hybrid composites containing fiber 0:20, 5:15, 10:10, 15:5 and 20:0 of (Tf:Sc) combinations loading. Sansevieria cylindrica leaves were used in this paper for extracting fiber out of it and in the similar manner ripen Tamarind fruit was used to extract fiber. Two different fibers viz. tamarind fruit/ Sansevieria cylindrica fibers were loaded into the epoxy system to develop the hybrid composites. The tensile and flexural properties of the resulting 20 wt. % loading of Tf/Sc/epoxy hybrid composites were examined. The resulting hybrid composites of 20 wt. % Tf/Sc with varying combinations exhibit the optimum improvement of mechanical properties and dielectric strength. 2 °C rise in decomposition temperature and 5 °C rise glass transition temperature were observed from the TGA and DSC thermal analysis. The fractured cross sections of flexural samples were assessed their performance as a function of fiber loading of Tf/Sc/epoxy hybrid composites by SEM analysis.

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