Improving tribological performance of fluoroether rubber composites by ionic liquid modified graphene

2019 ◽  
Vol 170 ◽  
pp. 109-115 ◽  
Author(s):  
Hao Wang ◽  
Hui Zhang ◽  
Jihua Zhang ◽  
Yunfeng Zhao
Keyword(s):  
Ionic Liquid ◽  
Tribological Performance ◽  
Rubber Composites ◽  
Modified Graphene

Effects of ionic liquid types on the tribological, mechanical, and thermal properties of ionic liquid modified graphene/polyimide shape memory composites

2021 ◽  
pp. 095400832199676
Author(s):  
Yuting Ouyang ◽  
Qiu Zhang ◽  
Xiukun Liu ◽  
Ruan Hong ◽  
Xu Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Shape Memory ◽  
Recovery Rate ◽  
Shape Recovery ◽  
Graphene Nanosheets ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Modified Graphene

Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10–5) mm3/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.

Oil-soluble ionic liquid to lubricate silicon

2021 ◽  
pp. 135065012098488
Author(s):  
Waleed Al-Sallami ◽  
Pourya Parsaeian ◽  
Abdel Dorgham ◽  
Anne Neville
Keyword(s):  
Ionic Liquid ◽  
High Temperature ◽  
Friction And Wear ◽  
Tribological Performance ◽  
Considerable Reduction ◽  
Zinc Dialkyldithiophosphate ◽  
Lubrication Mechanism ◽  
Wear Coefficient ◽  
Wear Performance ◽  
Micro Scale

Trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate (phosphonium phosphate) ionic liquid is soluble in non-polar lubricants. It has been proposed as an effective anti-wear additive comparable to zinc dialkyldithiophosphate. Previously, phosphonium phosphate has shown a better anti-wear performance under some conditions such as high temperature. In this work, the tribological performance and the lubrication mechanism of phosphonium phosphate are compared with that of zinc dialkyldithiophosphate when lubricating silicon under various tribological conditions. This can lead to an understanding of the reasons behind the superior anti-wear performance of phosphonium phosphate under some conditions. A micro-scale study is conducted using a nanotribometer. The results show that both additives lead to a considerable reduction in both friction and wear coefficients. The reduction in the wear coefficient is mainly controlled by the formation of the tribofilm on the rubbing surfaces. Zinc dialkyldithiophosphate can create a thicker tribofilm, which results in a better anti-wear performance. However, the formation of a thicker film will lead to a faster depletion and thus phosphonium phosphate can provide better anti-wear performance when the depletion of zinc dialkyldithiophosphate starts.

High dispersivity and excellent tribological performance of titanate coupling agent modified graphene oxide in hydraulic oil

Carbon ◽  
2020 ◽  
Vol 165 ◽  
pp. 238-250 ◽  
Author(s):  
Xiaopeng Li ◽  
Chaoliang Gan ◽  
Zeyong Han ◽  
Han Yan ◽  
Duoli Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Coupling Agent ◽  
Tribological Performance ◽  
Hydraulic Oil ◽  
Modified Graphene Oxide ◽  
Modified Graphene

scholarly journals Pebax/ionic liquid modified graphene oxide mixed matrix membranes for enhanced CO2 capture

2018 ◽  
Vol 565 ◽  
pp. 370-379 ◽  
Author(s):  
Guoji Huang ◽  
Ali Pournaghshband Isfahani ◽  
Ansori Muchtar ◽  
Kento Sakurai ◽  
Binod Babu Shrestha ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Co2 Capture ◽  
Mixed Matrix Membranes ◽  
Mixed Matrix ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Matrix Membranes
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