Ultralow friction polymer composites incorporated with monodispersed oil microcapsules

Zhang, Lin; Xie, Guoxin; Wu, Shuai; Peng, Shiguang; Zhang, Xiaoqing; Wen, Shizhu

doi:10.1007/s40544-019-0312-4

Cited by 61 publications

(40 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the microcapsule content is 20 wt%, the friction coefficient of the composite coating decreases to a minimum of 0.06, which is reduced by 90.65% compared to that of a pure epoxy coating. In addition, Zhang et al [10] prepared monodispersed polystyrene (PS)-encapsulated polyalphaolefin (PAO) microcapsules ( Fig. 6(e)).…”

Section: Tribological Properties Of Polymer Composite Coatingsmentioning

confidence: 99%

See 1 more Smart Citation

A review on tribology of polymer composite coatings

et al. 2020

Self Cite

View full text Add to dashboard Cite

Self-lubricating polymer composite coatings, with tailorable tribological and mechanical properties, have been widely employed on mechanical parts to reduce friction and wear, which saves energy and improves the overall performance for applications such as aerospace satellite parts, shafts, gears, and bushings. The addition of functional fillers can overcome the limitations of single-polymer coatings and extend the service life of the coatings by providing a combination of low friction, high wear resistance, high load bearing, high temperature resistance, and high adhesion. This paper compares the heat resistance, and the tribological and mechanical properties of common polymer matrices, as well as the categories of functional fillers that improve the coating performance. Applicable scopes, process parameters, advantages, and limitations of the preparation methods of polymer coatings are discussed in detail. The tribological properties of the composite coatings with different matrices and fillers are compared, and the lubrication mechanisms are analyzed. Fillers reduce friction by promoting the formation of transfer films or liquid shear films. Improvement of the mechanical properties of the composite coatings with fillers of different morphologies is described in terms of strengthening and toughening mechanisms, including a stress transfer mechanism, shear yielding, crack bridging, and interfacial debonding. The test and enhancement methods for the adhesion properties between the coating and substrate are discussed. The coating adhesion can be enhanced through mechanical treatment, chemical treatment, and energy treatment of the substrate. Finally, we propose the design strategies for high-performance polymer composite coating systems adapted to specific operating conditions, and the limitations of current polymer composite coating research are identified.

show abstract

Section: Tribological Properties Of Polymer Composite Coatingsmentioning

confidence: 99%

“…SEM images of the ball surfaces sliding against different composites: (h) pure EP resin, (i) composite with 5 wt% microcapsules. Reproduced with permission from Ref [10],. © The authors, 2021.…”

mentioning

confidence: 99%

A review on tribology of polymer composite coatings

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…In a bearing, the lubricant should be capable to reduce friction and wear, evacuate the heat, inhibit corrosion, and clean the surface, etc. [99][100][101]. In a well-lubricated running bearing, the two counterfaces are completely separated by a thin lubricant film, avoiding direct contact.…”

Section: Degradation Of Lubricantmentioning

confidence: 99%

Electrical bearing failures in electric vehicles

2020

Self Cite

View full text Add to dashboard Cite

In modern electric equipment, especially electric vehicles, inverter control systems can lead to complex shaft voltages and bearing currents. Within an electric motor, many parts have electrical failure problems, and among which bearings are the most sensitive and vulnerable components. In recent years, electrical failures in bearing have been frequently reported in electric vehicles, and the electrical failure of bearings has become a key issue that restricts the lifetime of all-electric motor-based power systems in a broader sense. The purpose of this review is to provide a comprehensive overview of the bearing premature failure in the mechanical systems exposed in an electrical environment represented by electric vehicles. The electrical environments in which bearing works including the different components and the origins of the shaft voltages and bearing currents, as well as the typical modes of electrical bearing failure including various topographical damages and lubrication failures, have been discussed. The fundamental influence mechanisms of voltage/current on the friction/ lubrication properties have been summarized and analyzed, and corresponding countermeasures have been proposed. Finally, a brief introduction to the key technical flaws in the current researches will be made and the future outlook of frontier directions will be discussed.

show abstract

“…The incorporation of rigid core‐shell nanoparticles to the polymer matrix can greatly improve the toughness and inhibit the fatigue‐crack propagation process due to the high resistance of the nanoparticles against plastic deformations 18–21 . Core‐shell nanoparticles are also extensively used in lubrication applications 22–24 . For instance, nanoparticles with a core containing oil lubricant show extremely low‐friction coefficient and solve the problem of the storage of the liquid lubricant.…”

Section: Introductionmentioning

confidence: 99%

“…[18][19][20][21] Core-shell nanoparticles are also extensively used in lubrication applications. [22][23][24] For instance, nanoparticles with a core containing oil lubricant show extremely low-friction coefficient and solve the problem of the storage of the liquid lubricant. Moreover, core-shell nanoparticles play a vital role in designing the self-lubrication and self-healing materials, which can effectively protect the engineering materials from mechanical damage or fatigue fracture.…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on mechanical strength and frictional properties of polytetrafluoroethylene‐based core‐shell nanocomposites

Bian

Zhang

et al. 2020

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Polytetrafluoroethylene (PTFE) has shown an outstanding lubricity as a solid lubricant, but its application is limited due to its low-mechanical strength and high-wear rate. In this study, core-shell nanoparticles were synthesized using PTFE as the core and polymethylmethacrylate (PMMA) as the shell. The formed core-shell nanocomposites by leveraging the core-shell nanoparticles as basic structural units exhibit remarkable enhancement on uniformity, tensile strength, and wear resistance, compared to mechanically mixed composites with the same composition. Our experiments demonstrated the following results: (1) Owing to the excellent uniformity, the maximum tensile strength of core-shell nanocomposites was 62 MPa, three times higher than that of mechanically mixed composites. (2) The composite matrix formed by PMMA shell had better reinforcement and protection effect on inner PTFE phase, resulting in a reduced wear rate of 0.3 × 10 −5 mm 3 /(N m), one order of magnitude lower than that of mechanically mixed composites. (3) The friction coefficient and interfacial mechanical properties of the core-shell nanocomposites at different temperatures have been systematically studied to get insights into lubrication mechanisms. It is proved that the temperature can decrease the modulus and increase the interfacial adhesion as well as the loss tangent of the core-shell nanocomposites, thus affecting the lubrication properties in multiple ways.

show abstract

Ultralow friction polymer composites incorporated with monodispersed oil microcapsules

Cited by 61 publications

References 44 publications

A review on tribology of polymer composite coatings

A review on tribology of polymer composite coatings

Electrical bearing failures in electric vehicles

Temperature effect on mechanical strength and frictional properties of polytetrafluoroethylene‐based core‐shell nanocomposites

Contact Info

Product

Resources

About