Tribological characteristics of polyimide composites in hydrogen environment

Theiler, Géraldine; Gradt, Thomas

doi:10.1016/j.triboint.2015.06.001

Cited by 36 publications

(18 citation statements)

References 34 publications

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“…harvard.edu hydrogen damage, hydrogen effects in polymers have been largely ignored until recently by the scientific community. [15][16][17][18] This is partly historical as hydrogen embrittlement effects in metals have been of critical importance in both the nuclear and oil and gas industry for decades. [19][20][21][22] A secondary consideration is that in nearly all applications involving high pressure hydrogen, polymers are typically not structural components, meaning that failure modes typically lead to hydrogen leaks rather than more catastrophic failures as may be the case with metals.…”

Section: Introductionmentioning

confidence: 99%

An in situ tribometer for measuring friction and wear of polymers in a high pressure hydrogen environment

Duranty

Roosendaal

Pitman

et al. 2017

Review of Scientific Instruments

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High pressure hydrogen effects on the friction and wear of polymers are of importance to myriad applications. Of special concern are those used in the infrastructure for hydrogen vehicle refueling stations, including compressor sliding seals, valves, and actuators. While much is known about potentially damaging embrittlement effects of hydrogen on metals, relatively little is known about the effects of high pressure hydrogen on polymers. However, based on the limited results that are published in the literature, polymers also apparently exhibit compatibility issues with hydrogen. An additional study is needed to elucidate these effects to avoid incompatibilities either through design or material selection. As part of this effort, we present here in situ high pressure hydrogen studies of the friction and wear on example polymers. To this end, we have built and demonstrated a custom-built pin-on-flat linear reciprocating tribometer and demonstrated its use with in situ studies of friction and wear behavior of nitrile butadiene rubber polymer samples in 28 MPa hydrogen. Tribology results indicate that friction and wear is increased in high pressure hydrogen as compared both with values measured in high pressure argon and ambient air conditions.

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Section: Introductionmentioning

confidence: 99%

An in situ tribometer for measuring friction and wear of polymers in a high pressure hydrogen environment

Duranty

Roosendaal

Pitman

et al. 2017

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

“…Hence, they conclude that in high-pressure hydrogen exposed conditions, steel counterparts do not form protective metal oxide layers and the pure metal composite is exposed to the active PTFE radicals, which form metal fluoride stable bonds as a transfer film and this transfer film hinders the subsequent wear due to the relative motion. [128] Theiler et al conducted tribology tests on PI [129] and PEEK [130] grades in hydrogen gas conditions (up to 0.1 MPa) to identify the influence on tribological properties by exposure to hydrogen. They also assumed no chemical reaction of PI or PEEK matrix in high-pressure hydrogen, however, they found tribologically induced reactions on the fresh metal surface of the counterpart and surface of PI and PEEK in the presence of hydrogen.…”

Section: Aging Of Thermoplastics In High-pressure Hydrogenmentioning

confidence: 99%

“…Therefore, the hydrogen atmosphere had been favorable in the tribological properties of polymers in contact with metal counterparts. [129,130] But, more tests are needed to identify the influence of metallic counterparts in high-pressure hydrogen conditions and chemical analyses with different material grades to identify this phenomenon thoroughly. In general, further improvements of characterization techniques and facilities of in-situ tribological experimental set-ups are needed to get a deeper understanding on influencing parameters of wear and friction behavior of polymers exposed to high-pressure hydrogen conditions.…”

Section: Aging Of Thermoplastics In High-pressure Hydrogenmentioning

confidence: 99%

A Review on Applicability, Limitations, and Improvements of Polymeric Materials in High-Pressure Hydrogen Gas Atmospheres

et al. 2021

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Typically, polymeric materials experience material degradation and damage over time in harsh environments. Improved understanding of the physical and chemical processes associated with possible damage modes intended in high-pressure hydrogen gas exposed atmospheres will help to select and develop materials well suited for applications fulfilling future energy demands in hydrogen as an energy carrier. In high-pressure hydrogen gas exposure conditions, damage from rapid gas decompression (RGD) and from aging in elastomeric as well as thermoplastic material components is unavoidable. This review discusses the applications of polymeric materials in a multi-material approach in the realization of the "Hydrogen economy". It covers the limitations of existing polymeric components, the current knowledge on polymeric material testing and characterization, and the latest developments. Some improvements are suggested in terms of material development and testing procedures to fill in the gaps in existing knowledge in the literature.

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“…1–4 Polyimide (PI), as a high-performance polymeric material, has been extensively used in various areas owing to their excellent thermal stability, mechanical properties, anti-radiation properties, chemical stability, and wear resistance. 5,6 Furthermore, thermosetting polyimides (TPI), compared of the thermoplastic polyimide, have been identified as a high-performance material with high glass-transition temperature and high load-bearing capacity.…”

Section: Introductionmentioning

confidence: 99%

The synergistic effect of SiC/R-GO composite on mechanical and tribological properties of thermosetting polyimide

Wang

Chen

et al. 2021

Journal of Composite Materials

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The effective means to solve material wear is to develop self-lubricating composite materials with excellent tribological, thermal, and mechanical properties. Herein, the composites of reduced graphene oxide (r-GO) nanosheet decorated with Silicon Carbide (SiC) were facilely prepared with employing a silane coupling agent, and the corresponding r-GO/SiC/thermosetting polyimide (r-GO/SiC/TPI) nanocomposite films were obtained by in situ polymerization method. The mechanical, tribological, and thermal properties of these nanocomposite films were investigated. When the content of r-GO/SiC was at 1.0 wt%, the compression strength and compression modulus of the composite increased by 37.7% and 47.3%, respectively, which were much higher than that of TPI composites addition of r-GO or SiC alone. Furthermore, r-GO/SiC/TPI composites also exhibited the lowest wear rate and friction coefficient in these reinforced TPI nanocomposites. When the content of r-GO/SiC was 0.8 wt%, particularly, the friction coefficient and wear rate of r-GO/SiC/TPI decreased by 22.8% and 79.8% compared to pure TPI, respectively. Additionally, trace amount r-GO/SiC hybrids also significantly enhance the thermal stability of TPI matrix. Compared to the polyimide composites reinforced by common nano-scale inorganic fillers, the outstanding mechanical and tribological properties of this r-GO/SiC/PI composites could be attributed to the ball on plane structure of GO/SiC, which lead to crack reflection, strength increment. These r-GO/SiC/TPI composites demonstrate the promising potential to be used as high-performance tribological materials in industry applications.

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Tribological characteristics of polyimide composites in hydrogen environment

Cited by 36 publications

References 34 publications

An in situ tribometer for measuring friction and wear of polymers in a high pressure hydrogen environment

An in situ tribometer for measuring friction and wear of polymers in a high pressure hydrogen environment

A Review on Applicability, Limitations, and Improvements of Polymeric Materials in High-Pressure Hydrogen Gas Atmospheres

The synergistic effect of SiC/R-GO composite on mechanical and tribological properties of thermosetting polyimide

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