Lubricating properties of silica/graphene oxide composite powders

Singh, Vivek Kumar; Elomaa, Oskari; Johansson, Leena‐Sisko; Hannula, Simo‐Pekka; Koskinen, Jari

doi:10.1016/j.carbon.2014.07.063

Cited by 54 publications

(26 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From Figure 3 b, it can be seen that the reflection of GO is a single peak at 2 θ = 10.3°, illustrating that the layer spacing is larger. Due to the oxide groups in GO, the water molecules were trapped between the graphene oxide sheets [ 29 , 30 ]. No obvious peak was found in the profile of GO, indicating that the graphite was successfully oxidized to GO.…”

Section: Resultsmentioning

confidence: 99%

Microstructural and Tribological Properties of a Dopamine Hydrochloride and Graphene Oxide Coating Applied to Multifilament Surgical Sutures

Zhang

Ren

et al. 2020

Polymers

View full text Add to dashboard Cite

With the development of fine surgery and desire for low-injury methods, the frictional properties of surgical sutures are one of the crucial factors that can cause damage to tissue, especially for some fragile and sensitive human tissues such as the eyeball. In this study, dopamine hydrochloride and graphene oxide were used as external application agents to prepare a biological coating for the surface of multifilament surgical sutures. The effects of this biocoating on the surface morphology, chemical properties, mechanical properties, and tribological properties of surgical sutures were studied. The friction force and the coefficient of friction of surgical sutures penetrating through a skin substitute were evaluated using a penetration friction apparatus and a linear elastic model. The tribological mechanism of the coating on the multifilament surgical sutures was investigated according to the results of the tribological test. The results showed that there were uniform dopamine and graphene oxide films on the surface of the surgical sutures, and that the fracture strength and yield stress of the coated sutures both increased. The surface wettability of the surgical sutures was improved after the coating treatment. The friction force and the coefficient of friction of the multifilament surgical sutures with the dopamine hydrochloride and graphene oxide coating changed little compared to those of the untreated multifilament surgical sutures.

show abstract

Section: Resultsmentioning

confidence: 99%

Microstructural and Tribological Properties of a Dopamine Hydrochloride and Graphene Oxide Coating Applied to Multifilament Surgical Sutures

Zhang

Ren

et al. 2020

Polymers

View full text Add to dashboard Cite

show abstract

“…When the load is up to 0.5 N, there is a steep increase of friction coefficient after a steady sliding for 1300 cycles. In this case, the rupture of boundary oil film leads to drastic increase of friction coefficient and severe wear …”

Section: Resultsmentioning

confidence: 99%

The Self‐Ordered Lamellar Texture of MoS₂ Transfer Film Formed in Complex Lubrication

Hou

Yang

Liu

et al. 2018

Adv Materials Inter

View full text Add to dashboard Cite

In virtue of the porous microstructure and permeability of a novel MoS2 coating constituted of loosely stacked nanosheets, low viscous polyalphaolefin‐4 lubricating oil is infused to form a solid–liquid complex lubrication coating. Compared with single lubrication mode, complex lubrication shows noticeable reduction of friction as the friction coefficient is just one‐fourth of that for solid coating and half of that for lubricating oil; meanwhile, the load‐carrying capability is drastically improved by more than six times and the lifetime is greatly prolonged from 1300 to beyond 16 000 cycles even under the high contact pressure of 0.5 GPa. Detailed microscopic observation and analysis are conducted to explore the reason behind this excellent performance. A thin, coherent MoS2 transfer film is found to cover the whole contact area on counter surface. The high‐resolution cross‐sectional view further shows there is highly ordered lamellar texture inside the transfer film. Through effective physical adhesion and reorientation, this self‐ordered texture plays a key role in lubrication process. It endows the MoS2 with high‐performance lubrication irrespective of the initial orientation. Meanwhile, this finding gives evidence that the lubricity of MoS2 strongly depends on the cleavage within the crystallites rather than intercrystallite slip.

show abstract

“…On the one hand, nanoparticle agglomeration destroys the integrity of the lubrication film. On the other hand, it is also considered that the increased number of nanoparticles clusters sliding against each other can have increasing influence on friction coefficient and wear volume [ 31 ]. Based on the observations on the tribological behaviors of the SiO 2 /MoS 2 hybrid nanofluids and cost savings, 1.00 wt%, concentration of the SiO 2 /MoS 2 hybrid nanoparticles in the base oil was chosen for further testing.…”

Section: Resultsmentioning

confidence: 99%

An Investigation on the Tribological Performances of the SiO2/MoS2 Hybrid Nanofluids for Magnesium Alloy-Steel Contacts

Xie

Jiang

Liu³

et al. 2016

Nanoscale Res Lett

108

View full text Add to dashboard Cite

Hybrid nano-materials offer potential scope for an increasing numerous novel applications when engineered to deliver availably functional properties. In the present study, the SiO2/MoS2 hybrid nanoparticles with different mass ratios were employed as lubricant additives in the base oil, and their tribological properties were evaluated using a reciprocating ball-on-plate tribometer for magnesium alloy-steel contacts. The results demonstrate that the SiO2/MoS2 hybrid nanoparticles exhibit superior lubrication performances than individual nano-SiO2 or nano-MoS2 even in high load and diverse velocity cases. The optimal SiO2/MoS2 mixing ratio and the concentration of SiO2/MoS2 hybrid nanoparticles in the base oil are 0.25:0.75 and 1.00–1.25 wt%, respectively. The excellent lubrication properties of the SiO2/MoS2 hybrid nanoparticles are attributed to the physical synergistic lubricating actions of nano-SiO2 and nano-MoS2 during the rubbing process.

show abstract

Lubricating properties of silica/graphene oxide composite powders

Cited by 54 publications

References 27 publications

Microstructural and Tribological Properties of a Dopamine Hydrochloride and Graphene Oxide Coating Applied to Multifilament Surgical Sutures

Microstructural and Tribological Properties of a Dopamine Hydrochloride and Graphene Oxide Coating Applied to Multifilament Surgical Sutures

The Self‐Ordered Lamellar Texture of MoS₂ Transfer Film Formed in Complex Lubrication

An Investigation on the Tribological Performances of the SiO2/MoS2 Hybrid Nanofluids for Magnesium Alloy-Steel Contacts

Contact Info

Product

Resources

About

Lubricating properties of silica/graphene oxide composite powders

Cited by 54 publications

References 27 publications

Microstructural and Tribological Properties of a Dopamine Hydrochloride and Graphene Oxide Coating Applied to Multifilament Surgical Sutures

Microstructural and Tribological Properties of a Dopamine Hydrochloride and Graphene Oxide Coating Applied to Multifilament Surgical Sutures

The Self‐Ordered Lamellar Texture of MoS2 Transfer Film Formed in Complex Lubrication

An Investigation on the Tribological Performances of the SiO2/MoS2 Hybrid Nanofluids for Magnesium Alloy-Steel Contacts

Contact Info

Product

Resources

About

The Self‐Ordered Lamellar Texture of MoS₂ Transfer Film Formed in Complex Lubrication