Tribological behavior of nanographite/polyimide composite under drying sliding condition

Wan, Changxin; Zhan, Shengpeng; Jia, Dechang; Tian, Ye; Chen, Hui; Yao, Chenyu; Duan, Haitao

doi:10.1016/j.wear.2022.204271

Cited by 6 publications

(6 citation statements)

References 44 publications

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“…P84NT1 as a co-polymer benzophenone tetracarboxylic dianhydride, SEM morphology and chemical structure characterization can be referred to our previous work. [31,32] Polyalphaolefin 40 (PAO 40) with density of 0.82 g/cm 3 , a kinematic viscosity of 17.2 mm 2 /s at 40 C and 4.1 mm 2 /s at 100 C, was bought from Chevron Corporation.…”

Section: Materials and Fabrication Processmentioning

confidence: 99%

“…The high-temperature pulverulent PIs are frequently applied to fabricate compacted bodies via a hot compressive molding process. A non-pore compact PI-based composite was prepared using the same raw material according to our articles published recently [31,32] to evaluate the evolution of mechanical and tribological properties accompanied by different filler content. As for high-temperature PPIs processing well below melting temperature, an understanding of the physical processes as well as the response to various process parameters during the fabrication process of polymer is necessary for obtaining reproducible and consistent products.…”

Section: Characterizationmentioning

confidence: 99%

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Preparation and tribological behavior of high‐temperature oil‐containing porous polyimides

Wan

Jia

Zhan

et al. 2023

Polymer Engineering & Sci

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This paper aimed to attempt the fabrication of high‐temperature oil‐containing porous polyimides (OCPPIs) using as‐polymerized powder with a no processing melting point, as well as investigate its tribological behavior. The OCPPIs were fabricated using a cold‐press sintering technique containing multiple gradient processing steps. Coalescence tightly among polymer powders was successfully achieved under a high‐elastic state by extending holding time vastly based on the time–temperature equivalence principle. The results indicate that OCPPIs possessed a high performance of oil retention after centrifuging in rotation 6000 r/min within 120 min whether low or high porosity. The tribological behaviors were evaluated by reciprocating friction tests under point‐contact conditions. Surprisingly, the tribological properties showed counterintuitive performance, wherein the best performance on the anti‐friction and wear resistance is encountered for the PPIs with the lowest porosity due to the excellent mechanical performance. The corresponding tribological mechanism with respect to multi‐phase wear and liquid–solid lubrication was also discussed comprehensively. This work fills the gap with respect to the fabrication of high‐temperature oil reservoirs and contributes to further understanding the forming mechanisms of porous materials under a high‐elastic state.

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Section: Materials and Fabrication Processmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Preparation and tribological behavior of high‐temperature oil‐containing porous polyimides

Wan

Jia

Zhan

et al. 2023

Polymer Engineering & Sci

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“…The bulk composite material is then produced through a heating and pressurization procedure. According to the reports, the incorporation of nanographite (NG) into PI via hot pressing has led to significant improvement in the tribological performance of NG/PI composites compared to pure PI (Wan et al , 2022). Another advantage of using hot pressing to prepare PI composites is that the various requirements for fillers are relatively low and composites with various fillers can be prepared, such as quartz fiber/PI composite materials (Chen et al , 2022) and MoS 2 /PI composite materials (Hu et al , 2023).…”

Section: Preparation Of Polyimide and Its Compositesmentioning

confidence: 99%

Review of tribological properties of polyimide-based composite materials

Yan

Zhang

Wang

2023

ILT

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Purpose As a high-performance engineering plastic, polyimide (PI) is widely used in the aerospace, electronics and automotive industries. This paper aims to review the latest progress in the tribological properties of PI-based composites, especially the effects of nanofiller selection, composite structure design and material modification on the tribological and mechanical properties of PI-matrix composites. Design/methodology/approach The preparation technology of PI and its composites is introduced and the effects of carbon nanotubes (CNTs), carbon fibers (CFs), graphene and its derivatives on the mechanical and tribological properties of PI-based composites are discussed. The effects of different nanofillers on tensile strength, tensile modulus, coefficient of friction and wear rate of PI-based composites are compared. Findings CNTs can serve as the strengthening and lubricating phase of PI, whereas CFs can significantly enhance the mechanical properties of the matrix. Two-dimensional graphene and its derivatives have a high modulus of elasticity and self-lubricating properties, making them ideal nanofillers to improve the lubrication performance of PI. In addition, copolymerization can improve the fracture toughness and impact resistance of PI, thereby enhancing its mechanical properties. Originality/value The mechanical and tribological properties of PI matrix composites vary depending on the nanofiller. Compared with nanofibers and nanoparticles, layered reinforcements can better improve the friction properties of PI composites. The synergistic effect of different composite fillers will become an important research system in the field of tribology in the future.

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“…Prior to the tensile tests, the samples were placed in a chamber for 72 h at a temperature of 23 ± 2°C and a humidity of 50%. The tribological experiments were conducted based on our previous article 35 , and the normal force, sliding frequency, and sliding time for the reciprocating friction tests were set as 80 N , 8 Hz, and 30 min, respectively. To ensure the reliability and accuracy of the data, the mechanical and tribological experiments were repeated three times.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…30,31 Various investigations mainly focused on the intrinsic relevance among the anti-friction, wear resistance, and mechanical performance as the lubricating fillers added to the matrix. [32][33][34][35] Obviously, the multifactor coupling effect caused by the addition of filler makes it difficult to qualitatively judge the mechanical property effect on the tribological performance of neat polymers.…”

Section: Introductionmentioning

confidence: 99%

Property investigation for high-Performance Polyimides fabricated via compression molding in solid-like state

Wan

Jia

Zhan

et al. 2022

High Performance Polymers

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A compacted body was fabricated by pulverulent polyimide (PI) block copolymers using solid-like state compression molding (SCM) technique. Polymer heated to solid-like state, i.e. the high-elastic non-melting state above the glass transition temperature ( Tg) and well below melting temperature, could achieve plasticity due to dramatic decreases in elastic modulus. Tensile properties were taken as response values, and the results of single-factor experiments indicated that molding temperature was the dominant parameter on mechanical performances, followed by molding pressure and holding time. Within this context, the SCM process possesses a longer processing time window whereas the processing temperature is narrow. The manufacturing defects induced by inappropriate processing conditions also hurt the tribological performance of PIs. Particles in a solid-like state could coalesce tightly only by exerting both high temperature and pressure in the SCM process. Thermoforming mechanism examined by atomic-scale molecular dynamics simulation indicated that non-bonding interaction forces, especially van der Waals forces play a key role in fusing among polymeric particles. This study is devoted to establishing the interdependence of structure-formability-property for high-temperature polymers that are not melt processible.

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Tribological behavior of nanographite/polyimide composite under drying sliding condition

Cited by 6 publications

References 44 publications

Preparation and tribological behavior of high‐temperature oil‐containing porous polyimides

Preparation and tribological behavior of high‐temperature oil‐containing porous polyimides

Review of tribological properties of polyimide-based composite materials

Property investigation for high-Performance Polyimides fabricated via compression molding in solid-like state

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