Two-component room temperature vulcanized silicone-rubber (RTV2) properties modification: effect of aluminum three hydrate and nanosilica additions on the microstructure, electrical, and mechanical properties

Zolriasatein, Ashkan; Navazani, Shiva; Abadchi, Majid Rezaei; Noori, Nastaran Riahi

doi:10.1007/s10854-021-05562-w

Cited by 8 publications

(5 citation statements)

References 40 publications

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“…On the other hand, ATH-based micro composite having highest ATH loading performed best among all the samples (at 35 °C and 6 MPa). This can be due to the facts that ATH exhibit high temperature and pressure endurance properties and release its water content in high stressed application resulting in formation of aluminium oxide (Al 2 O 3 ), high binding energy that lead to increase in heat [ 38 ] and mechanical stress [ 39 ] resistance of overall composite network.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

et al. 2022

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The incorporation of inorganic oxide fillers imparts superior dielectric properties in silicone rubber for high-voltage insulation. However, the dielectric characteristics are influenced by the mechanical stress. The effects of ramped compression on the dielectric properties of neat silicone rubber (NSiR), 15% SiO2 microcomposite (SSMC), 15% alumina trihydrate (ATH) microcomposite (SAMC) and 10% ATH + 2% SiO2 hybrid composite (SMNC) are presented in this study. The dielectric constant and dissipation factor were measured before and after each compression especially in the frequency range of 50 kHz to 2MHz. Before the compression, SSMC expressed the highest dielectric constant of 4.44 followed by SMNC and SAMC. After the compression cycle, SAMC expressed a better dielectric behavior exhibiting dielectric constant of 7.19 and a dissipation factor of 0.01164. Overall, SAMC expressed better dielectric response before and after compression cycle with dielectric constant and dissipation factor in admissible ranges.

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Section: Resultsmentioning

confidence: 99%

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

et al. 2022

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“…According to the technical documents of various commercial silicone rubbers, the typical values of dielectric constant are in the range of 2.6–3.4 F/m [ 21 , 43 , 44 , 45 ]. According to other literature, the range of dielectric constants of the identified silicone rubber ranges from 1.8–5.2 F/m [ 16 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ]. Since the dielectric constant does not change much with frequency, the value for the dielectric constant at a lower frequency remains almost the same as at a higher frequency [ 16 , 46 , 48 , 49 ].…”

Section: Discussionmentioning

confidence: 99%

“…Sui et al and Risse et al demonstrated that the conductivity increases linearly in a 0.1 Hz–10 MHz frequency range [ 50 , 53 ]. According to a number of literature reports, the dielectric loss of silicone rubber ranges between 1.0 × 10 −12 –1.6 × 10 −5 S/m, 1.0 × 10 −9 –2.0 × 10 −6 S/m, 1.0 × 10 −9 –4.4 × 10 −5 S/m, and 1.1 × 10 −5 –0.00038 S/m at 1 Hz, 100 Hz, 1 kHz, and 1 MHz, respectively [ 16 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ]. Most of the dielectric losses and loss factors of the identified silicone rubbers were measured under 10 MHz.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Mechanical and Dielectric Properties of Silicone Rubber

et al. 2021

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Silicone rubber’s silicone-oxygen backbones give unique material properties which are applicable in various biomedical devices. Due to the diversity of potential silicone rubber compositions, the material properties can vary widely. This paper characterizes the dielectric and mechanical properties of two different silicone rubbers, each with a different cure system, and in combination with silicone additives. A tactile mutator (Slacker™) and/or silicone thickener (Thi-vex™) were mixed with platinum-cured and condensation-cured silicone rubber in various concentrations. The dielectric constants, conductivities, and compressive and shear moduli were measured for each sample. Our study contributes novel information about the dielectric and mechanical properties of these two types of silicone rubber and how they change with the addition of two common silicone additives.

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“…If a surface is hydrophobic, the water drops should be circular when viewed from above, and hydrophobicity decreases as they depart from the circular shape. Figure 5 reveals some oval-shaped drops on the surface of sample rh, the number of oval-shaped drops decreased with increasing silica content in the sample, indicating an increase in hydrophobicity [28]. This is due to the surface roughness that silica nanoparticles have created [29].…”

Section: Hydrophobicity Class (Spray Test)mentioning

confidence: 94%

“…The tensile strength test was performed following the ISO37 standard, which is the most common standard for rubbers. The dumbbell-shaped sample was stretched by a Universal Testing Machine at a speed of 10 mm/min This test specifies a method for determining the tensilestress-strain properties of vulcanized and thermoplastic rubbers [28]. Elastic modulus can be calculated from the slope of the tensile test stress/strain graph when the material obeys Hooke's law.…”

Section: Characterizationmentioning

confidence: 99%

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2023

Asian J. Nanosci. Mater.

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One of the main challenges in preparing ceramic-reinforced polymer nanocomposites is the agglomeration of nanoparticles. This problem has been solved by surface modification of nanoparticles. In this study, silica nanoparticles were modified with low-cost and environmentally-friendly stearic acid instead of high-cost silanes or hazardous fluorinated hydrocarbons. RTV-2 silicone rubber/SiO2 nanocomposite films containing 1wt% and 3wt% silica modified with stearic acid:silica ratios of 2:1 and 1:1 were prepared, and the effects of different concentrations of stearic acid and silica on microstructure, hydrophobicity, mechanical and electrical properties were investigated. The microstructure of the samples was studied by field emission scanning electron microscopy. Spray and contact angle tests were also done to study the hydrophobicity. Increased hydrophobicity was observed with the incorporation of modified silica into RTV-2. Results of mechanical properties tests revealed that increased stearic acid concentration caused a deterioration in mechanical properties. Among all the composite and pure samples, the sample containing 3wt% silica modified with a lower amount of stearic acid exhibited the highest hardness, elongation at break, and tensile modulus. Results of electrical tests indicated that all composite samples had lower dielectric constant and dielectric loss factor and higher surface resistance compared to the pure sample.

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Two-component room temperature vulcanized silicone-rubber (RTV2) properties modification: effect of aluminum three hydrate and nanosilica additions on the microstructure, electrical, and mechanical properties

Cited by 8 publications

References 40 publications

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

Investigation of Ramped Compression Effect on the Dielectric Properties of Silicone Rubber Composites for the Coating of High-Voltage Insulation

Characterization of Mechanical and Dielectric Properties of Silicone Rubber

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