Surface structural changes, surface energy and antiwear properties of polytetrafluoroethylene induced by proton irradiation

Lv, Mei; Zheng, Fei; Wang, Qihua; Wang, Tingmei; Liang, Yong‐Min

doi:10.1016/j.matdes.2015.06.155

Cited by 27 publications

(14 citation statements)

References 51 publications

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“…From Fig. 2b, it can clearly be seen that the C1s peaks at about 293.6 and 291.5 eV attributing to -CF 2 -CF 2 O-and -CF 2 O-units in the PFPE even disappeared entirely after Pr irradiation, and two new peaks emerged at 288.6 and 284.8 eV corresponding to -CF 2 -CH 2 O-species and the amorphous carbon [21,22]. This can be explained by the fact that H + could induce the cleavage of the C-F and C-C bonds and lead to the formation of C-H bond and amorphous carbon [21].…”

Section: The Influence Of Irradiation On the Pfpe Base Oilmentioning

confidence: 96%

Investigation of the Tribological Performances of Graphene and WS2 Nanosheets as Additives for Perfluoroalkylpolyethers Under Simulated Space Environment

et al. 2021

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The tribological performances of perfluoroalkylpolyethers (PFPE) with graphene (Gr), WS2, and the mixture of Gr and WS2 (Gr + WS2) before and after ultraviolet (UV), atomic oxygen (AO), and proton (Pr) irradiations were investigated. The composition and structure of PFPE, Gr, WS2, and Gr + WS2 were also analyzed to understand the effects of irradiation on the tribological behaviors of PFPE with additives. The results indicated that serious deterioration and degradation of PFPE took place and Gr was transformed to amorphous carbon after Pr irradiation, and surface oxidation of WS2 occurred under the irradiations of AO and Pr. Moreover, compared to PFPE and PFPE additized with Gr and WS2, PFPE with the addition of Gr + WS2 exhibited excellent friction and wear reduction before and after UV and AO irradiations. Graphical Abstract

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Section: The Influence Of Irradiation On the Pfpe Base Oilmentioning

confidence: 96%

Investigation of the Tribological Performances of Graphene and WS2 Nanosheets as Additives for Perfluoroalkylpolyethers Under Simulated Space Environment

et al. 2021

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“…Only at FEP, an additional peak corresponding to the CF 3 side group was observed at 984 cm -1 . 24,26,27 A structural analysis revealed that no chemical structural change occurred in all samples after the accelerated aging test at pH 2 and pH 7. This suggests that the accelerated aging test led to morphological deformation of some materials, but it did not cause chemical changes.…”

Section: 폴리머 제43권 제2호 2019년mentioning

confidence: 96%

“…On the other hand, in the case of e-PTFE and FEP, the surface was hardly deformed, because the two materials consist of fluorinebased polymers and are thus highly resistant to chemicals. 24 In addition, the change in the membrane thickness was investigated after the accelerated aging test with different buffer solutions (pH 2 and pH 7). The initial thicknesses of the silicone, e-PTFE and FEP were 25.4±1.2, 27.2±1.7, and 21.4± 0.9 µm, respectively.…”

Section: 폴리머 제43권 제2호 2019년mentioning

confidence: 99%

Effect of pH on the Accelerated Aging Test of Gastrointestinal Absorption Inhibiting Stent Materials

Jang¹,

Cheon²,

Jung³

et al. 2019

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The stability of silicone and fluoropolymer materials, such as expanded polytetrafluoroethylene (e-PTFE) and fluorinated ethylene propylene copolymer (FEP), was assessed as bypass liners of an absorption inhibition stent to treat obesity. The stability was evaluated by conducting an accelerated aging test in a pH condition similar to a stomach acid and bile acid environments in contact with the actual stent bypass liner. The changes in the morphology and properties (chemical and physical) after accelerated aging were analyzed via SEM, FTIR and UTM. In addition, a bile acid permeation experiment was carried out using e-PTFE to confirm that in vitro testing could be used as a bypass liner of the stent to treat obesity.

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“…They found that the addition of CF can greatly improve the wear resistance of PEEK under different applied conditions such as sea water lubrication, water lubrication, and dry sliding wear . As an important solid lubricant, PTFE has been widely used in chemical processing, spacecraft design, and biotechnology industries due to its attractive physical and chemical properties, such as low frictional coefficient, good thermal, and chemical stability . As reported in literatures, it can provide a friction coefficient < 0.2 on various types under dry sliding condition .…”

Section: Introductionmentioning

confidence: 92%

Comparative study of the effects of nano‐sized and micro‐sized CF and PTFE on the thermal and tribological properties of PEEK composites

Wang

et al. 2017

Polymers for Advanced Techs

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The tribological characteristics of PEEK composites fretting against GCr 15 steel were investigated by a SRV-IV oscillating reciprocating ball-on-disk tribometer. In order to clarify the effect of type and size of fillers on the properties of PEEK composites, nano-sized and micro-sized CF and PTFE fillers were added to the PEEK matrix. The thermal conductivity, hardness, and fretting wear properties of PEEK composites reinforced by CF or PTFE were comparatively studied. The results showed that the type and size of the fillers have an important effect on both the friction coefficient and wear rate, by affecting their thermal conductivity, hardness, as well as the surface areas of their transfer films. In comparison, the effect on improving the tribological properties of micro-sized CF was superior to that of nano-sized CF, while the effect of nano-sized PTFE was superior to that of micro-sized PTFE. Considering the acceptable friction coefficient and wear rate of the composite under the fretting wear test, it seemed that 4% nCF, 20% mCF, 2% nPTFE and 10% mPTFE were desired additive proportions. And it also can be found that during the fretting wear test, the abrasive and adhesive wear resulted in accumulative debris at the contacting surface. The transfer films made of debris were formed on the counterfaces.

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Surface structural changes, surface energy and antiwear properties of polytetrafluoroethylene induced by proton irradiation

Cited by 27 publications

References 51 publications

Investigation of the Tribological Performances of Graphene and WS2 Nanosheets as Additives for Perfluoroalkylpolyethers Under Simulated Space Environment

Investigation of the Tribological Performances of Graphene and WS2 Nanosheets as Additives for Perfluoroalkylpolyethers Under Simulated Space Environment

Effect of pH on the Accelerated Aging Test of Gastrointestinal Absorption Inhibiting Stent Materials

Comparative study of the effects of nano‐sized and micro‐sized CF and PTFE on the thermal and tribological properties of PEEK composites

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