Tribological performance of ionic liquid modified graphene oxide/silicone rubber composite and the correlation of properties using machine learning methods

S, Sarath P.; Mahesh, Therese Yamuna; Pandey, Mrituanjay Kumar; Haponiuk, Józef T.; Thomas, Sabu; George, Soney C.

doi:10.1002/pen.25936

Cited by 12 publications

(1 citation statement)

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“…Silicone rubber (Q) is a highly important form of synthetic rubber that possesses an exceptional soft texture, good compressibility, and excellent electric properties and thermal oxidative stability. It has found extensive application across several fields. − Many researchers also introduced various conductive filler materials such as MWCNTs, − graphene, − reduced graphene oxide, − and carbon fiber − in the silicone rubber matrix for various electronic applications such as EMI shielding − and dielectric elastomer applications . Yang et al investigated the electromechanical properties of graphene-silicone rubber nanocomposites as flexible strain sensors.…”

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confidence: 99%

Development of Silicone Rubber-Multiwalled Carbon Nanotube Composites for Strain-Sensing Applications: Morphological, Mechanical, Electrical, and Sensing Properties

Krishnageham Sidharthan,

Keloth Paduvilan,

Velayudhan

et al. 2024

ACS Appl. Electron. Mater.

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This study presents a comprehensive investigation on the fabrication and characterization of piezoresistive elastomeric strain sensors using multiwalled carbon nanotubes (MWCNTs) incorporated into a silicone rubber matrix. Through meticulous experimentation and theoretical modeling, the study elucidates the intricate relationship between MWCNT concentration, mechanical properties, and electrical conductivity within the composite materials. The research reveals that composite formulations with MWCNT concentrations slightly above the percolation threshold exhibit superior strain-sensing properties. Specifically, composites containing 2 phr of MWCNTs demonstrate a remarkable gauge factor of 225, indicating enhanced sensitivity compared with higher MWCNT loadings. Mechanical testing using a tensile testing machine elucidates the complex interplay between MWCNT loading and tensile properties. However, subsequent enhancements in tensile properties with increasing MWCNT content suggest improved dispersion and reinforcing effects, highlighting the potential for tailored mechanical performance. The investigation of DC conductivity demonstrates a significant increase with rising MWCNT concentrations, indicative of the formation of conductive networks as MWCNTs reach the percolation threshold. Enhanced charge transport and constructive interface interactions facilitate efficient electron flow through the composite, which is crucial for applications requiring electrical conductivity. Moreover, the analysis of dielectric permittivity reveals its concentration-dependent increase, attributed to the large surface area of MWCNTs promoting stronger interactions with the matrix and enhanced polarization under electric fields. Drastic changes in AC conductivity at lower frequency levels within the percolation region suggest influences of dielectric relaxation, polarization effects, and formation of conductive paths. This study underscores the potential of MWCNTs-silicone rubber composites as versatile materials for advanced strain-sensing applications, offering tunable mechanical and electrical properties tailored to specific requirements.

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Section: Introductionmentioning

confidence: 99%

Development of Silicone Rubber-Multiwalled Carbon Nanotube Composites for Strain-Sensing Applications: Morphological, Mechanical, Electrical, and Sensing Properties

Krishnageham Sidharthan,

Keloth Paduvilan,

Velayudhan

et al. 2024

ACS Appl. Electron. Mater.

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Study the synergistic effect of fumed silica and reduced graphene oxide insertion on the thermal, mechanical, tribological, and solvent transport properties of silicone rubber nanocomposites

Sarath

Pahovnik

Utroša

et al. 2022

J of Applied Polymer Sci

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This study explored the effects of hybrid nanofillers such as fumed silica (FSiO 2 ) and reduced graphene oxide (rGO) on the mechanical, thermal, solvent transport, and tribological properties of silicone rubber nanocomposite (QMSirGO). A pin-on-disc test system was used to investigate the friction and wear properties of QMSirGO nanocomposites, which were significantly influenced by the applied load, temperature, and rGO concentration. Study shows that better graphene oxide dispersion in the matrix paved the way for improved tensile and dynamic mechanical properties and lowered the coefficient of friction and specific wear rate (Ws) values. Compared to silicone rubber (QM), the friction coefficient of the QMSirGO1.5 composite was reduced by around 40%. The mechanism involves the formation of a lubricant layer, which smooths the material surface that comes into contact with the metal surface. In the solvent transport study, we investigated the effect of solvents' structure, molecular size, filler concentration, and the transport mechanism of composites, and the extent of reinforcement was evaluated using Kraus equations. K E Y W O R D Sfriction, mechanical properties, thermal properties, wear and lubrication | INTRODUCTIONSilicone rubber (QM) has distinctive qualities originating from its unique molecular structure. 1 It has been widely employed to substitute petrochemical goods in various companies, including aerospace, automobiles, construction, electronics, medical, and food processing. The unique hydrogen bonding interactions among silica surfaces, silanol groups, and the polydimethylsiloxane chain significantly impact this interaction coefficient. [2][3][4][5][6] Graphene is a two-dimensional substance with outstanding electron transport, mechanical properties, and a large surface area that has attracted scientific attention. 5 Graphene has also been considered a strategic candidate to strengthen polymeric materials for a wide variety of uses such as structures, automotive, filtration, packaging, electronics, aerospace, electromagnetic interference (EMI) shielding, and so on. [6][7][8][9][10] Stacked graphene materials have piqued researchers due to their anti-friction, anti-wear, and good self-lubricating qualities. In earlier research, we

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Properties and Mechanism of Friction‐Reducing Silicone Rubber Modified with Hyperbranched Polysiloxane

Ai,

Wang

2024

Macro Chemistry & Physics

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During the utilization of silicone rubber, excessive friction can cause damage to the contact surface and the material itself. Therefore, friction‐reducing modification of silicone rubber has attracted much attention. In this paper, hyperbranched polysiloxanes with different structures is synthesized for friction‐reducing modification of silicone rubber. Infrared spectroscopy, nuclear magnetic resonance spectroscopy and amine titration tests reveal that hyperbranched polysiloxanes are successfully synthesized by the hydrolytic condensation of 3‐aminopropyltriethoxysilane and their Michael addition with four acrylates with different alkyl chains. The friction coefficients and mechanical properties of silicone rubber are evaluated. Hyperbranched polysiloxanes significantly reduces friction and maintained excellent mechanical properties of silicone rubber. Silicone rubber with butyl‐ester‐secondary‐amino hyperbranched polysiloxane displays the best overall performance, with static and dynamic friction coefficients decreasing by 33.99% and 43.16% compared with that of pure silicone rubber, respectively, and a tensile strength of 10.80 MPa. The friction‐reducing mechanism of hyperbranched polysiloxanes on silicone rubber is investigated by contact angle test and dynamic mechanical analysis. Hyperbranched polysiloxanes migrates to the surface due to the incompatibility of alkyl chains with silicone rubber matrix. Consequently, the shielding effect produced by hyperbranched polysiloxanes on the surface depresses the adsorption activity of silicone rubber surface thereby reducing friction.This article is protected by copyright. All rights reserved

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Tribological performance of ionic liquid modified graphene oxide/silicone rubber composite and the correlation of properties using machine learning methods

Cited by 12 publications

References 39 publications

Development of Silicone Rubber-Multiwalled Carbon Nanotube Composites for Strain-Sensing Applications: Morphological, Mechanical, Electrical, and Sensing Properties

Development of Silicone Rubber-Multiwalled Carbon Nanotube Composites for Strain-Sensing Applications: Morphological, Mechanical, Electrical, and Sensing Properties

Study the synergistic effect of fumed silica and reduced graphene oxide insertion on the thermal, mechanical, tribological, and solvent transport properties of silicone rubber nanocomposites

Properties and Mechanism of Friction‐Reducing Silicone Rubber Modified with Hyperbranched Polysiloxane

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