Effect of MWCNTs-COOH Reinforcement on Tribological Behaviors of PI/MWCNTs-COOH Nanocomposites Under Seawater Lubrication

Nie, Peng; Min, Chunying; Chen, Xihui; Shen, Chen; Tu, Wenjun; Song, Haojie

doi:10.1080/10402004.2015.1046006

Cited by 15 publications

(8 citation statements)

References 28 publications

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“…The weak absorption peaks at 1752, 1659 and 705 cm −1 correspond to the symmetric stretching vibration of C=O, the -C=O- vibration and the deformation vibration of the acyl ring. These energy bands correspond to the CO-N-OC group, demonstrating that MWCNTs-COOH attached to PANI through covalent bonds [ 29 , 30 , 31 ]. The Raman spectra provide additional evidence for the growth of PANI along the MWCNTs.…”

Section: Resultsmentioning

confidence: 99%

Flexible Room-Temperature Ammonia Gas Sensors Based on PANI-MWCNTs/PDMS Film for Breathing Analysis and Food Safety

et al. 2023

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Gas sensors have played a critical role in healthcare, atmospheric environmental monitoring, military applications and so on. In particular, flexible sensing devices are of great interest, benefitting from flexibility and wearability. However, developing flexible gas sensors with a high sensitivity, great stability and workability is still challenging. In this work, multi-walled carbon nanotubes (MWCNTs) were grown on polydimethylsiloxane (PDMS) films, which were further modified with polyaniline (PANI) using a simple chemical oxidation synthesis. The superior flexibility of the PANI-MWCNTs/PDMS film enabled a stable initial resistance value, even under bending conditions. The flexible sensor showed excellent NH3 sensing performances, including a high response (11.8 ± 0.2 for 40 ppm of NH3) and a low limit of detection (10 ppb) at room temperature. Moreover, the effect of a humid environment on the NH3 sensing performances was investigated. The results show that the response of the sensor is enhanced under high humidity conditions because water molecules can promote the adsorption of NH3 on the PANI-MWCNTs/PDMS films. In addition, the PANI-MWCNTs/PDMS film sensor had the abilities of detecting NH3 in the simulated breath of patients with kidney disease and the freshness of shrimp. These above results reveal the potential application of the PANI-MWCNTs/PDMS sensor for monitoring NH3 in human breath and food.

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Section: Resultsmentioning

confidence: 99%

Flexible Room-Temperature Ammonia Gas Sensors Based on PANI-MWCNTs/PDMS Film for Breathing Analysis and Food Safety

et al. 2023

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“…Peng and his co‐workers revealed the effect of functionalized CNTs on the wear resistance of PI composites. The results identified that the incorporation of functionalized CNTs greatly improved the thermal stability and tribological properties, which mainly because of the good interfacial bonding strength between PI matrix and CNTs 25,26 …”

Section: Introductionmentioning

confidence: 99%

“…The results identified that the incorporation of functionalized CNTs greatly improved the thermal stability and tribological properties, which mainly because of the good interfacial bonding strength between PI matrix and CNTs. 25,26 Considerable results reveal that CNTs have a positive influence on the anti-wear properties of polymer composites. Current researches are basically based on the macroscale investigation, which provides help to understand the nature of friction and wear to a certain extent.…”

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confidence: 99%

Molecular dynamic simulation study of tribological mechanism of PI composites reinforced by CNTs with different orientations

Wang

et al. 2022

Polymer Composites

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The tribological models of polyimide (PI) reinforced by carbon nanotubes (CNTs) with different orientations were constructed via a molecular dynamic simulation. The variation of PI molecular chains and frictional interface properties were explored for understanding microscopic tribological mechanism of different oriented CNTs. The average friction coefficients of PI composites reinforced by X‐, Y‐, and Z‐oriented CNTs were 0.242, 0.270, and 0.243. Meanwhile, the abrasion rates of XCNT, YCNT, and ZCNT were 11.5% 34.8%, and 28.0%, respectively. The atomic concentration, interfacial temperature and shear strength of XCNT and ZCNT were higher than those of YCNT. The radial distribution function was simulated and interpreted during the friction process to determine the inherent interaction between PI molecular chains and CNTs with specific orientations.

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“…It was found that the friction and wear modification of polyimide (PI) composites had been achieved by introducing multiscale CFs, the main mechanism is the decrease in stress concentration between the matrix and reinforcement phase caused by multiscale characteristics of fillers [12]. CNTs with high elastic modulus and strength are also usually used as additives to enhance the tribological and mechanical characters of polymers matrix composites, and the lubrication and wear mechanism is similar to SCFs reinforced composites [13][14][15].…”

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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Effect of MWCNTs-COOH Reinforcement on Tribological Behaviors of PI/MWCNTs-COOH Nanocomposites Under Seawater Lubrication

Cited by 15 publications

References 28 publications

Flexible Room-Temperature Ammonia Gas Sensors Based on PANI-MWCNTs/PDMS Film for Breathing Analysis and Food Safety

Flexible Room-Temperature Ammonia Gas Sensors Based on PANI-MWCNTs/PDMS Film for Breathing Analysis and Food Safety

Molecular dynamic simulation study of tribological mechanism of PI composites reinforced by CNTs with different orientations

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

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