Hygrothermal ageing performance of high temperature vulcanised silicone rubber and its degradation mechanism

Deng, Yu; Peng, Bo; Liu, Zheyuan; Du, Yuchen; Zhou, Songsong; Liu, Jinghua; Yu, Xiaoli; Zhou, Jun

doi:10.1049/hve2.12347

Cited by 6 publications

(2 citation statements)

References 18 publications

(20 reference statements)

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“…Electrical insulating materials, especially those used for outdoor insulation, often operate over a long period of time under harsh service environments such as high temperatures, high humidity, large temperature change between day and night, and strong ultraviolet radiation [1][2][3]. Therefore, robust weather resistance is an important requirement for outdoor insulating materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and performance improvement of a dual‐component microcapsule self‐healing system for silicone rubber insulating material

Li,

Cao,

Yin

et al. 2023

High Voltage

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A key factor limiting the development of silicone rubber insulating materials is their short service life in harsh operating environments. The establishment of a self‐healing system is desired to improve the long‐term operational performance of silicone rubber and effectively extend its service life. In this study, poly(urea‐formaldehyde) microcapsules containing polydimethylsiloxane healing agents are prepared and a dual‐component microcapsule self‐healing system for silicone rubber material is established and optimised. In addition, the key factors affecting the self‐healing performance (such as microcapsule size, rupture rate, and microcapsule doping amount) are investigated. It is found that when SYLGARDTM 184 is used as the healing agent and matrix, with a 4:6 (A:B) doping ratio of dual‐component microcapsules and 20 phr doping amount, the self‐healing efficiency is approximately 51%. Furthermore, increasing the microcapsule rupture rate and the interface strength between the healing agent and the matrix can effectively improve the self‐healing performance. The relationships between key factors and self‐healing performance are theoretically revealed. Based on the relationships, the microcapsule self‐healing system can be appropriately designed. The results of this paper can provide a reference for the development of long‐life silicone rubber insulating materials.

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Section: Introductionmentioning

confidence: 99%

Preparation and performance improvement of a dual‐component microcapsule self‐healing system for silicone rubber insulating material

Li,

Cao,

Yin

et al. 2023

High Voltage

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“…Band gap energies of all samples during aging. This process typically occurs due to oxidation or exposure to high temperatures and water[50,51].…”

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confidence: 99%

Performance investigation of hydrothermally stressed polyamide nanocomposites for insulation applications

Khan,

Butt,

Ahmad

et al. 2024

Mater. Res. Express

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This paper investigates the performance of novel nano ZnO filled polyamide nanocomposites under hydrothermal conditions for cable insulation applications. Neat polyamide (PA0) and its nanocomposite with 0wt.% (PA0), 1 wt.% (PA1), 3 wt.% (PA3), 5 wt.% (PA5), and 7 wt.% (PA7) of nano ZnO were prepared and subjected to accelerated hydrothermal aging conditions in a programmable chamber at 85 oC and 85% relative humidity for 300 hours. The samples were analyzed with visual inspection, hydrophobicity evaluation, optical microscopy, Fourier Transform Infrared (FTIR) spectroscopy, leakage current and UV-Vis spectroscopy after every 100 hours of aging. Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) were employed for analyzing filler dispersion. Maximum filler dispersion was achieved in the case of 3wt.% of nanofiller. All the samples expressed surface degradation and increase in leakage current after aging. Maximum surface roughness and highest leakage current of 7µA were noticed for PA0, however PA3 expressed lowest leakage current and surface degradation. PA0 expressed the lowest hydrophobicity class of HC-3 and lowest contact angle of 75o after aging. Among the nanocomposites, PA3 expressed the highest hydrophobicity class (HC-1) and contact angle (112o) after aging. FTIR results expressed that all the samples suffered from oxidation and the C=O peaks at ~1728cm-1 increased by 120%, 100% and 120% for PA1, PA3 and PA7 respectively. The peaks of -OH group at ~3500cm-1 increased for all the sample indicating moister absorption. However, it is observed that the addition of nanofiller enhanced the overall performance of composites and among the composites PA3 performed better.

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Molecular dynamics supported thermal-moisture aging effects on properties of silicone rubber

Gao,

Li,

et al. 2024

Progress in Organic Coatings

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Hygrothermal ageing performance of high temperature vulcanised silicone rubber and its degradation mechanism

Cited by 6 publications

References 18 publications

Preparation and performance improvement of a dual‐component microcapsule self‐healing system for silicone rubber insulating material

Preparation and performance improvement of a dual‐component microcapsule self‐healing system for silicone rubber insulating material

Performance investigation of hydrothermally stressed polyamide nanocomposites for insulation applications

Molecular dynamics supported thermal-moisture aging effects on properties of silicone rubber

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