Investigation of the way to enhance the synergistic effect between polyimide and graphene on the tribological performance of polytetrafluoroethylene composites

Niu, Xiaoxing; Zhou, Shidong; Pan, Deng; Zhao, Yuanliang; Li, Lei

doi:10.1002/pc.27013

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…From Figure 5(a), the absorption bands of imide rings are at 1720 cm −1 (C=O symmetric stretching) and 1780 cm −1 (C=O asymmetric stretching) in the spectrum of pure PI. 29 In addition, these characteristic peaks of PI can be observed from the spectrum of PI/SiO 2 , PI/Cu and PI/SiO 2 /Cu nanocomposites. All of these phenomena implies that PI was synthesized successfully.…”

Section: Resultsmentioning

confidence: 92%

The effect of silica and copper nanoparticles in polyimide on the friction and wear of polyethersulfone/polyimide mixture

Zhou

Niu

Zhang

et al. 2022

Polymers and Polymer Composites

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The synergistic effect of silica (SiO2) and copper (Cu) nanoparticles in polyimide (PI) on the friction interfacial deformation of polyethersulfone/polyimide (PES/PI) blends was studied. Results indicate that the effect of SiO2 and Cu nanoparticles on the tribological performance of PES/PI nanocomposites is quite different from each other. The addition of SiO2 nanoparticles into PI improves the antifriction of PES/PI nanocomposites by 24.4%, but has little effect on the wear resistance. The incorporation of Cu nanoparticles into PI enhances the wear resistance of PES/PI nanocomposites by 55.5%, but has little effect on the antifriction. PES/PI nanocomposites achieve the better comprehensive tribological performance when the content of SiO2 and Cu is 0.8 wt and 0.2 wt%, respectively. The friction interfacial deformation analysis reveals that SiO2 in PI improve the continuity and uniformity of deformation in friction interface and reduce the severe wear of transfer film. Cu nanoparticles in PI improves the continuity but not the ununiformity of deformation. Thus, the abrasive wear of counterpart ball is severe. The synergistic effect of SiO2 and Cu nanoparticles in PI improves the continuity and uniformity of friction interfacial deformation, which contributes to the improvement of friction and wear of PES/PI nanocomposites.

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Section: Resultsmentioning

confidence: 92%

The effect of silica and copper nanoparticles in polyimide on the friction and wear of polyethersulfone/polyimide mixture

Zhou

Niu

Zhang

et al. 2022

Polymers and Polymer Composites

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“…[6,7,[16][17][18][19] However, like common polyimides, SMPIs are electrically insulated, which limits their applications. Adding functional phases to form composites can effectively expand the functionality of materials, like electrical conductivity, [20][21][22][23][24] thermal conductivity, [25][26][27][28] and electromagnetic wave absorption. [29][30][31] As representative conductive polymers, polyaniline (PANI) and its derivatives are suitable conductive modifiers because of their high electrical conductivity and stability in environments or during redox processes.…”

Section: Introductionmentioning

confidence: 99%

“…[32][33][34] Hence, in this article, SMPI-PANI composites with good electrical conductivity and shape memory properties were synthesized by in situ polycondensation, during which the interpenetrating networks formed. Compared with incorporating conductive fillers [6,[20][21][22][23] or embedding conductive networks on the surface of films, [7,24] this approach can avoid generating defects and can be used for fabricate bulky conductive structures. The thermomechanical properties, thermal stabilities, electrical conductivities, shape memory performances of SMPI-PANI composites were characterized and the possible structure of interpenetrating SMPI/PANI network was discussed.…”

Section: Introductionmentioning

confidence: 99%

Interpenetrating shape memory polyimide‐polyaniline composites with electrical conductivity

Gao

2023

Polymer Composites

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Shape memory polyimides (SMPI) with adjustable shape recovery temperatures have been paid much attention in both fundamental research and practical applications. However, the intrinsically electrical insulation of SMPIs limits their applications. In this article, the electrically conductive shape memory polyimide‐polyaniline (SMPI‐PANI) composite with interpenetrating networks was synthesized by in situ polycondensation. Compared with pure SMPI, the electrical resistivity of SMPI‐PANI composites reduced by about 12 orders of magnitude when the PANI content was 15 wt%. The addition of PANI had less influence on the glass transition temperature and storage modulus in glassy state. But the storage modulus of SMPI‐PANI composites in rubbery state was over 40 times higher than that of pure SMPI, indicating that SMPI‐PANI composites have higher stiffness during shape recovery. The SMPI‐PANI composites demonstrate excellent shape memory performance with shape fixation ratio higher than 97% and shape recovery ratio higher than 93%. The SMPI‐PANI composites also have good thermal stability with the effective decomposition temperatures higher than 150°C. The SMPI‐PANI composite in our work is a potential material for deployable aerospace structure.

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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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Investigation of the way to enhance the synergistic effect between polyimide and graphene on the tribological performance of polytetrafluoroethylene composites

Cited by 6 publications

References 23 publications

The effect of silica and copper nanoparticles in polyimide on the friction and wear of polyethersulfone/polyimide mixture

The effect of silica and copper nanoparticles in polyimide on the friction and wear of polyethersulfone/polyimide mixture

Interpenetrating shape memory polyimide‐polyaniline composites with electrical conductivity

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

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