Tribological Properties of PTFE and PTFE Composites at Different Temperatures

Ye, Sujuan; Zeng, Xingrong

doi:10.1080/10402004.2013.812759

Cited by 54 publications

(31 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The abrasion resistance of PTFE get worse when the temperature rises. [38] Secondly, the FTIR spectra of PTFE sheet after friction with the Al electrode at various temperatures is illustrated in Figure 6a. Figure 6b shows that the absorption bands appear at 773 and 793 cm À1 owing to the presence of group CF 2 O.…”

Section: The Characterization Of Ptfe Sheetsmentioning

confidence: 99%

Temperature Effect on Performance of Triboelectric Nanogenerator

Han

et al. 2017

Adv Eng Mater

186

View full text Add to dashboard Cite

The triboelectric nanogenerator (TENG) is a promising energy harvesting technology that can convert mechanical energy into electricity and can be used as self-powered active sensors. However, previous studies are mostly carried out at room temperature without considering the temperature effect on the electrical performance of TENGs, which is critical for the application of electronics powered by TENGs in different regions in the world. In the present work, a TENG that worked in the single-electrode and contactseparation mode is utilized to reveal the influence of environment temperature on the electrical performance of TENG. The electrical performance of the TENG shows a decreasing tendency, as the temperature rises from À20 to 150 C, which is controlled by the temperature-induced changes in the ability of storing and gaining electrons for polytetrafluoroethylene (PTFE). The storing electron ability change of PTFE is attributed to two aspects: one is the reduction of relative permittivity of PTFE sheet as the temperature increases, and the other is the variations of effective defects such as the escape of trapped charges in shallow traps and surface oxidation under the effect of temperature perturbation. This work can provide useful information for the application of TENG in both electric power generation and selfpowered sensors in the harsh environment. Experimental SectionFabrication of the TENG: The TENG in this work was made up of a Al foil (55 Â 55 Â 1 mm), polyethylene terephthalate (PET) insulation tapes, PTFE sheets (55 Â 55 Â 3 mm). The PTFE sheet is a commercial product

show abstract

Section: The Characterization Of Ptfe Sheetsmentioning

confidence: 99%

Temperature Effect on Performance of Triboelectric Nanogenerator

Han

et al. 2017

Adv Eng Mater

186

View full text Add to dashboard Cite

show abstract

“…Subsequently, coated tools were employed in the end milling of aluminium. Although PTFE composite coatings [18] are found to be effective in several applications, their combination with graphite has not been reported to date in machining applications. Further, the present work is an attempt to achieve a low-cost tooling solution for the dry machining of aluminium.…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Comparison of Tribological Properties of MoS₂and Graphite-PTFE Coatings and its Impact on Machining of Aluminium by HSS End Mills

Iyappan

Ghosh

2014

Materials and Manufacturing Processes

View full text Add to dashboard Cite

In the present paper, a graphite-PTFE composite coating (Gr-x) on an HSS end mill is proposed for machining aluminium. The suitability of this coating was first simulated in a pin-on-disc test and was compared to the performance of MoS 2 before evaluation through machining testing. In the tribo-test, both coatings exhibited their extraordinary lubrication properties and could successfully reduce uneven frictional forces as observed with an aluminium pin against uncoated HSS. However, MoS 2 -coated HSS end mills failed to produce such a favorable impact in machining. SEM images and chip morphology indicate evidence of the adherence of aluminium on the rake surface of a MoS 2 -coated tool. In contrast, Gr-x coating substantially outperformed MoS 2 in the end milling test. Built-up edge (BUE) was completely arrested by Gr-x coating, and a better finish resulted from reduction of cutting force. Under the given machining conditions, the temperature was expectedly below the chemical degradation point of both coating materials and hence environmental humidity seemed to be a critical factor, which weakened the performance of MoS 2 but improved that of graphite. Cutting speeds no higher than 60 m/min are recommended for Gr-x coating during end milling of aluminium.

show abstract

“…PTFE and TEG were chosen to study the possibility of increasing the functional characteristics of PTFE, including enhancing its kinetic characteristics, elastic limit, wear resistance, etc. In fact, various studies have been carried out regarding nanocomposites based on PTFE and carbon-based nanofillers [24,[29][30][31][32][33][34][35][36]. However, these studies focused mainly on the potential of carbon nanofillers to improve the mechanical and tribological properties of PTFE.…”

Section: Introductionmentioning

confidence: 99%

“…They differ by the studied materials (type of polymer and nanofiller), the preparation method for the nanocomposites, and the characterization techniques involved. Commonly studied polymers include PET [28], Epoxy [22][23], PEDS [25] and PTFE [24,[29][30][31][32][33][34]. In the present study, TEG was used as reinforcing nanofiller in a fluoroplastic (PTFE) polymer matrix, whose general formula is: -[-CF2-CF2-] n .…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of polytetrafluoroethylene (PTFE)/Thermally Expanded Graphite (TEG) nanocomposites

Sahli

Cablé

Chetehouna

et al. 2017

Composites Part B: Engineering

View full text Add to dashboard Cite

In this study, TEG-reinforced polytetrafluoroethylene (PTFE) nanocomposites were prepared.The structural properties of the PTFE/TEG composites were then investigated using X-ray diffraction (XRD) and infrared spectroscopy (FT-IR). Subsequently, the thermal stability, thermal resistance of the composites were studied through differential scanning calorimetry (DSC) and thermo-gravimetric analysis (TGA). The XRD results allowed to report a high degree of dispersion of the TEG inside of the PTFE matrix. Moreover, milling at high temperature was found to enhance the dispersion of the TEG inside of the polymer matrix. Furthermore, the results revealed an increase of the glass-transition temperature when using an increased concentration of TEG. This result confirms that the degradation of the TEG/PTFE nanocomposite occurs at a higher temperature with a greater TEG loading. These finds give an indication of the potential of TEG to improve the thermal properties and durability of PTFE, for instance with application in the field of aeronautics.

show abstract

Tribological Properties of PTFE and PTFE Composites at Different Temperatures

Cited by 54 publications

References 15 publications

Temperature Effect on Performance of Triboelectric Nanogenerator

Temperature Effect on Performance of Triboelectric Nanogenerator

Comparison of Tribological Properties of MoS₂and Graphite-PTFE Coatings and its Impact on Machining of Aluminium by HSS End Mills

Preparation and characterization of polytetrafluoroethylene (PTFE)/Thermally Expanded Graphite (TEG) nanocomposites

Contact Info

Product

Resources

About

Tribological Properties of PTFE and PTFE Composites at Different Temperatures

Cited by 54 publications

References 15 publications

Temperature Effect on Performance of Triboelectric Nanogenerator

Temperature Effect on Performance of Triboelectric Nanogenerator

Comparison of Tribological Properties of MoS2and Graphite-PTFE Coatings and its Impact on Machining of Aluminium by HSS End Mills

Preparation and characterization of polytetrafluoroethylene (PTFE)/Thermally Expanded Graphite (TEG) nanocomposites

Contact Info

Product

Resources

About

Comparison of Tribological Properties of MoS₂and Graphite-PTFE Coatings and its Impact on Machining of Aluminium by HSS End Mills