Tribological properties of polyimide-modified UHMWPE for bushing materials of seawater lubricated sliding bearings

Chen, Song; Li, Jian; Wei, Lei; Jin, Yongliang; Shang, Hongfei; Hua, Meng; Duan, Haitao

doi:10.1016/j.triboint.2017.06.011

Cited by 52 publications

(17 citation statements)

References 25 publications

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“…Accordingly, research and development of seawater‐lubricated antifriction/antiwear materials are in full swing. Thermoplastic polymers and their composites have proven to be promising seawater‐lubricated materials because of excellent corrosion resistance, low friction, and high wear resistance under seawater lubrication . Some high‐performance thermoplastic polymers, eg, poly(ether ether ketone) (PEEK) and poly(tetrafluoroethylene) (PTFE), have well served as seawater‐lubricated friction components in seawater at normal pressure .…”

Section: Saturated Seawater Absorption Of Ptfe Peek Pom and Uhmwpementioning

confidence: 99%

Hydrostatic pressure–dependent wear behavior of thermoplastic polymers in deep sea

Líu

Wang

Jiang

2018

Polymers for Advanced Techs

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It is generally acknowledged that wear behavior of approved water-lubricated thermoplastic polymers are not susceptible to hydrostatic pressure in seawater environment.However, in our recent study reported in this letter, it has been shown that the wear behavior of thermoplastic polymers sliding in seawater is strongly dependent on the hydrostatic pressure. The correlation between hydrostatic pressure and wear rates of thermoplastic polymers can be expressed in an identical form of exponential function, which has been found to be susceptible to some factors, such as polymer property, seawater absorption, filler type, sliding condition, and counterpart material. Moreover, in this letter, a primary model has been proposed to illuminate the effect of hydrostatic pressure on the wear behavior of thermoplastic polymers sliding in deep sea. KEYWORDS deep sea, hydrostatic pressure, thermoplastic polymers, wear Nowadays, environment-friendly and energy-efficient seawater lubrication model is being strongly recommended and becomes more and more popular in modern ships and marine machineries, especially for various deep-sea hydraulic systems. 1,2 Accordingly, research and development of seawater-lubricated antifriction/antiwear materials are in full swing. Thermoplastic polymers and their composites have proven to be promising seawater-lubricated materials because of excellent corrosion resistance, low friction, and high wear resistance under seawater lubrication. 3,4 Some high-performance thermoplastic polymers, eg, poly(ether ether ketone) (PEEK) and poly(tetrafluoroethylene) (PTFE), have well served as seawater-lubricated friction components in seawater at normal pressure. 5,6 In recent years, with the rapid development of deep-sea exploitation, application of thermoplastic polymers and their composites as seawater-lubricated components are increasingly expanding toward deeper seawater environment. With the seawaterdepth increasing, however, the hydrostatic pressure of seawater will also correspondingly increase; specifically, every 100-m increase in seawater depth is probably associated with 1-MPa increase in the hydrostatic pressure. In some practical applications, it has been found that with the seawater hydrostatic pressure increasing, the reliability of such seawater-lubricated polymer friction components becomes more and more hard to be assured, often leading to unexpected accelerated failure in great depth. It seems that the seawater hydrostatic pressure may have some considerable effects on the wear behavior of thermoplastic polymers in the deep sea. But this has never been firmly confirmed by experiments because of the lack of professional friction tester by which the deep-sea environment with high pressure can be simulated, and meanwhile, in situ tribology tests can be achieved in the simulated environment. 7 However, the correlation between deep-sea hydrostatic pressure and wear behavior of seawater-lubricated thermoplastic polymers cannot be well supported by traditional lubrication and friction theory.First...

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Section: Saturated Seawater Absorption Of Ptfe Peek Pom and Uhmwpementioning

confidence: 99%

Hydrostatic pressure–dependent wear behavior of thermoplastic polymers in deep sea

Líu

Wang

Jiang

2018

Polymers for Advanced Techs

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“…Unlike other specially engineered plastics, PI, a versatile polymeric material, has been extensively applied in high-tech fields, such as aerospace, ocean, mechanical and auto industries, in form of gears, piston rings, bearings, and other tribological parts. [5][6][7] Unfortunately pure PI has the disadvantages of a high friction coefficient, poor wear resistance, low tensile strength and compressive strength, and high brittleness and, thus, cannot perform independently under demanding work conditions, which greatly limits its application areas. [8][9][10] To meet practical requirements, numerous studies have concentrated on employing fillers to improve the properties of PI.…”

Section: Introductionmentioning

confidence: 99%

Improving the tribological and mechanical properties of polyimide composites by incorporating functionalized graphene

Zhang

Hong

et al. 2019

High Performance Polymers

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To explore the effect of added graphene sheets (GNs) and added perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) on the tribological and mechanical performances of polyimide (PI) matrix, GNs and PTCDA reinforced PI-based composites were synthesized via the blending method. The tribological properties of GNs/PTCDA/PI (GAPI) composites with different weight ratios of GNs and PTCDA under dry sliding, deionized water lubrication, and kerosene lubrication were comparatively investigated. A synergism was found between GNs and PTCDA; this synergism endowed filled PI composites with a lower friction coefficient and showed an improved wear rate under different lubrication conditions, especially when the weight ratio of GNs and PTCDA was 1:1 (GAPI-1). Under dry sliding, deionized water lubrication, and kerosene lubrication, the friction coefficient of GAPI-1 composites decreased by 41.1%, 70%, and 35.7%, respectively, while the wear rate decreased by 39%, 50%, and 25.1%, respectively. Meanwhile, the tensile strength, tensile modulus, and the elongation at break of GAPI-1 films increased by 40.8%, 51.3%, and 49.2%, respectively, relative to those of pure PI. We anticipate that this work can be used to exploit a simple and effective method for preparing materials for bearings and transmission parts that possess good tribological properties under harsh lubrication conditions.

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“…This has limited the use of laminates . In this regard, more uniform thermoplastic polymer‐based composites reinforced with short or milled fibers, such as poly(ether ether ketone) (PEEK), poly(oxymethylene) (POM), and ultrahigh molecular weight polyethylene (UHMWPE), are gaining increasing attention . In particular, POM has well known for its superior specific strength, chemical resistance, and high price/performance ratio and has been widely used in marine engineering.…”

Section: Introductionmentioning

confidence: 99%

Durability of fiber‐reinforced polyoxymethylene composites under the high hydrostatic pressure in the deep sea

Líu

Wang

Jiang

2019

J of Applied Polymer Sci

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The effect of hydrostatic pressure of up to 40 MPa on the seawater permeation, crystalline structure, and mechanical strength of carbon fiber and glass fiber‐reinforced polyoxymethylene (POM) composites was investigated. The experimental results reveal that hydrostatic pressure slightly promotes seawater permeation throughout the POM composites and degrades the bonding strength of the matrix–fiber interface. In the POM matrix, the seawater hydrostatic pressure does not influence the chemical stability but induces a physical chain scission process, which is characterized by linearly decreased molecular weight. The chain scissions initially entangled in the amorphous region are supposed to have sufficient mobility to join the crystalline phase. The increased crystallinity, albeit slight, together with the compress effect of hydrostatic pressure may possibly account for the stable mechanical strengths of the POM composites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48686.

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Tribological properties of polyimide-modified UHMWPE for bushing materials of seawater lubricated sliding bearings

Cited by 52 publications

References 25 publications

Hydrostatic pressure–dependent wear behavior of thermoplastic polymers in deep sea

Hydrostatic pressure–dependent wear behavior of thermoplastic polymers in deep sea

Improving the tribological and mechanical properties of polyimide composites by incorporating functionalized graphene

Durability of fiber‐reinforced polyoxymethylene composites under the high hydrostatic pressure in the deep sea

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