Effect of homologous molecular crosslinking on the tribological properties of <scp>PTFE</scp> composites

He, Y.J.; Lin, Bin; Wang, Yaohua; Fang, Zhao; Ning, G.; Bao, Xuan; Sui, Tianyi

doi:10.1002/pc.27479

Cited by 5 publications

(1 citation statement)

References 84 publications

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“…Fillers with low friction resistance that are used to effectively reduce the friction coefficient of materials are soft metals (e.g., lead [15], copper, nickel [16]), soft polymers (e.g., polyamide [17], PTFE [18]), graphite [19,20], molybdenum disulfide [21,22], and others [23]. The most commonly used polymer materials for the production of sliding materials are polyamides [24], PTFE [25], polyamide imides [26], polyimides [27], polyethylenes [28,29], PEEK [30] phenol-formaldehyde resins [31,32], and epoxy resins [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Tribological Properties of Composites Based on Single-Component Powdered Epoxy Matrix Filled with Graphite

Smoleń,

Stępień,

Mikuśkiewicz

et al. 2024

Materials

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Composites based on powdered single-component epoxy matrix are an alternative technological solution for composites produced using liquid epoxy resins. This article describes in detail the process of producing graphite-reinforced composites for tribological applications. The advantages and disadvantages of technological processes where the matrix is a single-component epoxy powder were demonstrated, and the properties of the obtained materials were examined. A series of composite materials with the graphite filler with sizes below 10 μm and below 45 μm and weight additions of 5, 10, 20, 30% were produced. Mechanical tests and tribological tests conducted with the pin-on-block method were performed, and the mechanism of tribological wear was described. The conducted research allowed us to conclude that the incorporation of graphite, regardless of particle size, above 10% by weight results in a significant reduction in the friction coefficient (approximately 40–50% lower than in unfilled epoxy resin), which is beneficial in the production of cheap self-lubricating materials.

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Section: Introductionmentioning

confidence: 99%

Tribological Properties of Composites Based on Single-Component Powdered Epoxy Matrix Filled with Graphite

Smoleń,

Stępień,

Mikuśkiewicz

et al. 2024

Materials

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Highly lubricating and wear‐resistant Ti₃C₂T_x@SiO₂/PI composites based on the action of transfer film at the friction surface

Chen,

Ma,

Jiang

et al. 2024

Polymer Composites

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Polyimide (PI) is a special engineering plastic, widely involved in mechanical components, instruments, and petrochemicals. However, single PI material is inevitably subject to wear and tear in practice, which leads to weakened material properties. In this work, Ti3C2Tx@SiO2 was prepared to enhance the wear resistance and lubrication properties of PI by intercalating SiO2 into the interlayer of Ti3C2Tx sheets. Ti3C2Tx@SiO2/PI composites were fabricated in two steps to test the tribological performances. SiO2 particles change the form of interfacial friction from sliding to rolling, thus relieving direct friction between material and steel ball. So, the composites have a minimum COF (COF = 0.33) when the content of Ti3C2Tx@SiO2 is 0.80 wt%. Moreover, the average value of wear rate was 0.24 × 10−5 mm3/(N·m) when Ti3C2Tx@SiO2 content was 1.60 wt%, which was 91.0% lower compared to the PI matrix. During the friction process, the abrasive chips of the material migrate to the surface of the steel ball to form a transfer film, which protects the material and thus reduces the wear rate. Therefore, the hybrids Ti3C2Tx@SiO2 are effective and important wear‐resistant agents and solid lubricants to improve the wear resistance and lubricity of PI or other polymer materials.Highlights SiO2 insert Ti3C2Tx is a key factor in changing sliding friction into rolling friction, effectively reducing the COF. The average wear rate was 91.0% lower than that of the polyimide matrix when Ti3C2Tx@SiO2 content was 1.60 wt%. The minimum COF of Ti3C2Tx@SiO2/PI composites reached 0.33 when the content of Ti3C2Tx@SiO2 was 0.80 wt%. The transfer film effectively reduces further wear of the material during friction.

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Role of reinforcement on the tribological properties of polytetrafluoroethylene composites: A comprehensive review

Deshwal,

Belgamwar,

Bekinal

et al. 2024

Polymer Composites

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Polytetrafluoroethylene (PTFE) is widely used in tribological applications. However, it faces challenges due to its high wear rate. Reinforcement of additives in PTFE reduces its wear rate by up to 10,000 times in dry conditions. Infusing metallic filler materials like Al, Cu, and Pb improves PTFE wear performance but increases the coefficient of friction (COF). However, it may not be suitable for corrosive environments due to potential metal reactivity. Reinforcing PTFE composites with carbon‐based materials reduces weight, improves wear properties, and lowers COF. Pre‐treated materials enhance bonding for improved anti‐friction and anti‐wear properties. PTFE and its composites are widely used in journal bearings, bearing pads, and ball bearings due to their excellent low‐speed, low‐load lubrication properties. They outperform Babbitt alloy in bearing pads, except in heat conductivity. PTFE can also be used as a solid lubricant and can be combined with additives for improved performance. Apart from it, achieving an optimal combination of properties for all forms of reinforcement can be challenging due to the difficulty in determining exact values for multiple properties with specific types of reinforcement. This article provides a comprehensive review that delves into the significant findings pertaining to reinforcement and its application in bearing technology.Highlights Metals and carbon‐based fillers improve tribo‐properties. Polytetrafluoroethylene (PTFE) provides lubrication and thermal stability to the polymeric materials. Estimation of tribo‐thermal properties in combination is a challenge. Testing conditions greatly impact PTFE composites performance. PTFE as a solid lubricant suitable for low‐speed/load applications.

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Effect of homologous molecular crosslinking on the tribological properties of PTFE composites

Cited by 5 publications

References 84 publications

Tribological Properties of Composites Based on Single-Component Powdered Epoxy Matrix Filled with Graphite

Tribological Properties of Composites Based on Single-Component Powdered Epoxy Matrix Filled with Graphite

Highly lubricating and wear‐resistant Ti₃C₂T_x@SiO₂/PI composites based on the action of transfer film at the friction surface

Role of reinforcement on the tribological properties of polytetrafluoroethylene composites: A comprehensive review

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Effect of homologous molecular crosslinking on the tribological properties of PTFE composites

Cited by 5 publications

References 84 publications

Tribological Properties of Composites Based on Single-Component Powdered Epoxy Matrix Filled with Graphite

Tribological Properties of Composites Based on Single-Component Powdered Epoxy Matrix Filled with Graphite

Highly lubricating and wear‐resistant Ti3C2Tx@SiO2/PI composites based on the action of transfer film at the friction surface

Role of reinforcement on the tribological properties of polytetrafluoroethylene composites: A comprehensive review

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Highly lubricating and wear‐resistant Ti₃C₂T_x@SiO₂/PI composites based on the action of transfer film at the friction surface