Multi-Stressed Nano and Micro-Silica/Silicone Rubber Composites with Improved Dielectric and High-Voltage Insulation Properties

Abstract

The scope of silicone rubber (SiR) is confined due to the deprivation of its dielectric propertiesupon exposure to various ambient stresses. The aim of this research is to develop silicone rubber-based composites by employing inorganic oxide fillers for improved dielectric and high voltage insulation properties for widening its scope in the field of electrical appliances. This study reports the preparation of different composites of silicone rubber with varying concentrations of micro and nano-silica fillers. The dielectric propertytrends of these as-prepared neat and impregnated samples were examined via an indigenously developed weathering chamber capable of applying multiple stresses of acid rain, heat, humidity, UVA radiation, and salt fog. Dielectric constant values were measured before and after applying stresses. Upon applying stresses, a periodic decline in dielectric constant was observed. Improved dielectric properties were obtained by adding micro and nano-silica as fillers. A nano silica-incorporated silicone rubber product exhibited good potential for dual applications as dielectric and high voltage insulation.

Preparation of High-Strength and Excellent Compatibility Fluorine/Silicone Rubber Composites under the Synergistic Effect of Fillers

“…Rubber products are widely used in automobiles, construction, electrical appliances, medical equipment, and other fields. − Rubber materials and rubber composites have always been the focus of research. − Among other things, rubber materials in applications are subject to changing with environmental changes, such as high temperature, low temperature, acid–base, oily and organic media, and so forth, leading to changes in the properties of rubber materials and thus limiting their use. − At present, the above problems can be effectively solved by combining two or more rubbers or other materials through physical and chemical actions. , Previous studies have made significant progress in improving the properties of rubber composites. , In rubber composites, one kind of rubber is used as the matrix material, and it is a common method for researchers to select different auxiliary materials for composites. The selection of synergistic materials involves the design and preparation of materials, which can be another rubber or filler. , …”

“…Rubber products are widely used in automobiles, construction, electrical appliances, medical equipment, and other fields. 1 − 4 Rubber materials and rubber composites have always been the focus of research. 5 − 7 Among other things, rubber materials in applications are subject to changing with environmental changes, such as high temperature, low temperature, acid–base, oily and organic media, and so forth, leading to changes in the properties of rubber materials and thus limiting their use.…”

Effect of NO2 Aging on the Surface Structure and Thermal Stability of Silicone Rubber with Varying Al(OH)3 Contents

“…SiR (SIR) composite insulators have many advantages, such as light weight, strong mechanical property, good antifouling performance, special hydrophobic recovery and insulation, etc. [ 1 , 2 , 3 , 4 , 5 ], which can effectively reduce the occurrence of breakdown, pollution flashover [ 6 , 7 ], and other malignant accidents; therefore, silicon rubber has a wide range of applications in the field of high-voltage power transmission [ 8 , 9 , 10 , 11 ]. High temperature vulcanized (HTV) SiR is the main insulating material of composite insulators.…”

Properties of Polysiloxane/Nanosilica Nanodielectrics for Wearable Electronic Devices

“…Some of the most used materials for flexible dielectrics are polysiloxanes, such as poly(dimethylsiloxane) (PDMS), which are characterized by a fully saturated backbone of alternating silicon and oxygen atoms. This structure results in excellent properties, such as a high elasticity even at low-temperature, high-temperature resistance, resistance to radiation, chemicals and climatic constraints, easy processability and biocompatibility [ 10 , 11 , 12 , 13 , 14 , 15 ]. However, the mechanical properties, and especially the stiffness, of unfilled polysiloxanes are poor.…”

“…Nanosilica has commonly been used to modify the mechanical properties of polysiloxanes due to its good price–performance ratio [ 13 , 14 ]. The size of the silica particles has a strong influence on the mechanical properties of polysiloxane composites; in one study, a monotonic increase of the tensile and tear strengths along with fracture toughness of polysiloxane composites was observed when the size of silica particles decreased from 500 to 20 nm [ 2 ].…”