Wear resistance effects of alumina and carbon nanoscale fillers in PFA, FEP, and HDPE polymers

Makowiec, Mary E.; Gionta, Grace L.; Bhargava, Suvrat; Ozisik, Rahmi; Blanchet, Thierry A.

doi:10.1016/j.wear.2022.204376

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…In the specialized literature [2,3,6,7,9,[10][11][12][13][14][17][18][19][20] it is shown that the main mechanisms that generate friction in the case of polymers are the adhesion and deformation of the two materials in contact. Adhesion is characterized by a transfer of material from one surface to another.…”

Section: Wwwjosaromentioning

confidence: 99%

“…The phenomenon of friction occurs as a result of the sliding resistance of one solid body in contact with another [2][3][4]. The wear of materials with industrial applications represents the damage of a surface in sliding motion compared to the counterpart, the phenomenon being that the wear is a consequence of the friction process [2,[4][5][6][7][8]. Friction and wear represent the response of surfaces in motion under the action of exploitation factors, not being properties of the materials [4].…”

Section: Introductionmentioning

confidence: 99%

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Assessments on the Friction and Wear Behavior of Some Polymeric Materials Used in Sliding Contacts

PETRE,

STOIAN,

ENESCU

et al. 2023

J. Sci. Arts

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The effects of friction on polymeric materials are quite difficult to explain due to the micro and macroscopic interactions of the friction coupling surfaces, which slide over each other. The friction and wear behavior of surfaces in sliding motion can be considered important design criteria. By adding different concentrations of reinforcing agent to the base material, the tribological performance of surfaces in sliding motion can be obtained. The experimental study was carried out on a pin-on-disc type tribological stand under dry friction conditions. The friction and wear behavior was analyzed for two base materials (PTFE and PA66) and the same glass fiber reinforced materials (PTFE + 25% fiber-glass and PA66+GF30). The tests were carried out at different sliding speeds and loading forces, v1=0.20 m/s, v2=0.50 m/s, v3=0.75 m/s and loading forces, Fn1=1.0 N, Fn2=2.5 N, Fn3=5.0 N over a friction length of 5000 mm. Research has shown that the coefficient of friction decreases with increasing loading force. Tests have shown that a high value of the friction coefficient does not mean a high wear rate, the wear rate values are between 10-12 and 10-15 m2/N. TheL(1) presences of the reinforcing agent in the base material have a significant importance on the friction and wear behavior under the action of operating factors (load, sliding speed).

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Section: Wwwjosaromentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessments on the Friction and Wear Behavior of Some Polymeric Materials Used in Sliding Contacts

PETRE,

STOIAN,

ENESCU

et al. 2023

J. Sci. Arts

View full text Add to dashboard Cite

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“…The temperature rise will occur when the bearing undergoes high-speed and heavy-load conditions or in a thermal water environment, such as geothermal water and bio-implant applications, which accelerate the wear and aging of polymer composites [28][29][30]. Inorganic fillers, as a good additive, possess high temperature stability and can effectively enhance the tribological and bearing capacity of composites [31][32][33]. The carbon fiber is an appropriate additive to modify the surface and mechanical properties of the HDPE materials.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Tribological Behavior of HDPE Composites Reinforced by Short Carbon Fiber under Water-Lubricated Conditions

2022

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The polymer water-lubricated bearing is widely used in marine transmission systems, and the tribological properties can be improved by addition of inorganic nano-fillers. The aim of this study is to investigate the effect of SCFs and temperature on the water-lubricating properties of high-density polyethylene (HDPE) composites. HDPE composites reinforced by varying content of short carbon fibers (SCFs) were fabricated via twin-screw extrusion and injection molding techniques to study the hardness and surface wettability of those composites. The tribological properties under water-lubricated conditions were investigated through a pin-on-disk reciprocating tribometer under different temperatures. The results showed that the increase in hardness of HDPE composites reached maximum to 42.9% after adding 25 wt % SCFs. The contact angle also increased with the increase in SCFs content and reached a maximum of 95.2° as the amount of SCFs increased to 20 wt %. The incorporation of SCFs increased the wear resistance and lubricating property of HDPE composites at different temperatures. The HDPE composite containing 20 wt % SCFs showed the lowest friction coefficient of 0.076 at 40 °C, and the wear track depth reached a maximum of 36.3 mm at 60 °C. Based on the surface wetting property and wear analysis, potential effect mechanisms of fillers and temperature were discussed. The knowledge from this study is useful for designing the anti-wear water-lubricated polymer bearing.

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A Low‐Permeability and Flexible Polymer Tube for Long‐Life Fiber Lithium‐Ion Batteries

Jiang,

Gong,

Wang

et al. 2024

Adv Funct Materials

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Fiber lithium‐ion batteries (FLIBs) hold great promise for powering wearable electronics. However, their practical application is hindered by limited cycle and calendar life, primarily due to the loss of active Li caused by water vapor permeation through the encapsulation layer. To address this challenge, a low‐permeability and high‐flexibility tetrafluoroethylene hexafluoropropylene copolymer (FEP) tube is presented to continuously encapsulate FLIBs by melting extrusion method. Owing to the inherent hydrophobicity of fluorine resins and appropriate crystallinity of the polymer matrix, FEP tubes exhibited significantly low vapor permeability, with a water vapor transmittance rate (WVTR) of 0.3 mg·day−1·pkg−1, 15 times lower than that of the nylon 12 tubes (4.6 mg·day−1·pkg−1). Leveraging the low permeability and elastic modulus of FEP tubes, FLIBs demonstrate a capacity retention of 80.05% after 180 cycles and exceptional flexibility with a capacity retention of 98.32% after 10 000 bending cycles, showcasing superior performance compared to the conventional polymer tubes (for example, the capacity of PP‐FLIBs declined by 20.68% after 30 cycles). This work presents a general and efficient strategy for continuously encapsulating FLIBs, effectively extending their cycle and calendar lifetime of FLIBs, thereby enhancing their practical viability for wearable electronic applications.

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Wear resistance effects of alumina and carbon nanoscale fillers in PFA, FEP, and HDPE polymers

Cited by 5 publications

References 22 publications

Assessments on the Friction and Wear Behavior of Some Polymeric Materials Used in Sliding Contacts

Assessments on the Friction and Wear Behavior of Some Polymeric Materials Used in Sliding Contacts

High-Temperature Tribological Behavior of HDPE Composites Reinforced by Short Carbon Fiber under Water-Lubricated Conditions

A Low‐Permeability and Flexible Polymer Tube for Long‐Life Fiber Lithium‐Ion Batteries

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