scholarly journals Insight into the Effect of TDMs on the Tribological Behaviors of the Ionic Liquid Composite Films

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 191
Author(s):  
Ya’e Qi ◽  
Ling Zhang ◽  
Yongxia Wang
Keyword(s):  
Ionic Liquid ◽  
Rational Design ◽  
2D Materials ◽  
Composite Films ◽  
Wear Properties ◽  
Low Friction ◽  
Wear Life ◽  
Load Carrying ◽  
Practical Engineering ◽  
Ambiguous Effect

Ionic liquid (IL) combined with 2D materials has evoked considerable attention in the field of lubrication applications because of their speical structure and outstanding lubrication properties. However, the ambiguous effect of the 2D materials on the friction and anti-wear properties of the IL needs futher study. Here, we have obtained two families of IL composite films with additives of MoS 2 and graphene via a combined process of spin-coated and curing, and the distinction of the effects of two additives on the tribological performance of the IL films was studied. The friction tests showed that the friction coefficient and anti-wear life of the IL films were greatly enhanced after the addition of MoS 2 or graphene, which could be attributed to the improved load-carrying capacity and the second lubrication phase. Under a low addition content, graphene had more advantages to reduce the friction of the films, and MoS 2 was more beneficial to the tribological properties with the additional content increased. The films with low friction and good anti-wear properties may be valuable for the rational design of lubrication films for the practical engineering applications.

Preparation of Cellulose/Xanthan Gum Composite Films and Hydrogels Using Ionic Liquid

2014 ◽  
Vol 22 (3) ◽  
pp. 298-303 ◽  
Author(s):  
Miwa Setoyama ◽  
Kazuya Yamamoto ◽  
Jun-ichi Kadokawa
Keyword(s):  
Ionic Liquid ◽  
Xanthan Gum ◽  
Composite Films

Effect of sol aging time on the wear properties of TiO2–SiO2 composite films prepared by a sol–gel method

2016 ◽  
Vol 104 ◽  
pp. 175-182 ◽  
Author(s):  
M. Yazıcı ◽  
O. Çomaklı ◽  
T. Yetim ◽  
A.F. Yetim ◽  
A. Çelik
Keyword(s):  
Aging Time ◽  
Sol Gel ◽  
Composite Films ◽  
Wear Properties ◽  
Gel Method ◽  
Sol Gel Method

Effects of soaking in water, base oil, ionic liquid and grease of an epoxy/UHMWPE/MoS2 composite on mechanical and tribological properties

2021 ◽  
pp. 1-17
Author(s):  
Neha Singh ◽  
Sujeet K Sinha
Keyword(s):  
Ionic Liquid ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Polar Liquids ◽  
Base Oil ◽  
Mechanical And Tribological Properties ◽  
Liquid Absorption ◽  
Wear Life ◽  
Water Base ◽  
Ultra High Molecular Weight

Abstract Liquid absorption and tribological studies of epoxy-based composite with ultra-high molecular weight polyethylene (UHMWPE) and MoS2, sliding against steel were conducted. Composites, as coating and as a bulk, were soaked in water, base oil, ionic liquid and lithium-based grease for different intervals of days or months. Liquid weight% gain was more in polar liquids when compared to non-polar. Coated composite soaked in grease for 10 days showed coefficient of friction of 0.08 with wear-life of more than 1 million cycles and wear rate of 1.7×10−8 mm3/Nm. Bulk polymer composite soaked in grease for 180 days provided the least coefficient of friction of 0.06 and specific wear rate of 2.60×10−7 mm3/Nm.

Structure and Properties of Composite Films of Cellulose and Chitosan from Ionic Liquid

2012 ◽  
Vol 499 ◽  
pp. 80-84
Author(s):  
Huai Fang Wang ◽  
Wei Han Huang ◽  
Zhi Kai Wang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Ionic Liquid ◽  
Antimicrobial Property ◽  
Composite Films ◽  
Antibacterial Properties ◽  
Strong Interactions ◽  
Structure And Properties ◽  
Blend Films ◽  
Methyl Imidazole

A series of blend films of cellulose and chitosan were prepared from 1-ethyl-3-methyl imidazole acetate ([Emim] Ac) by coagulating with ethanol. Structure, mechanical properties, thermal stability and antibacterial properties were investigated. The results showed that there were strong interactions and good compatibility between cellulose and chitosan in blend films. The blend films possess good mechanical properties and thermal stability, and the existence of chitosan endows blend films with antimicrobial property.

scholarly journals Fundamental aspects of electrochemically controlled wetting of nanoscale composite materials

2017 ◽  
Vol 199 ◽  
pp. 75-99 ◽  
Author(s):  
A. Robert Hillman ◽  
Karl S. Ryder ◽  
Hani K. Ismail ◽  
Asuman Unal ◽  
Annelies Voorhaar
Keyword(s):  
Ionic Liquid ◽  
Composite Materials ◽  
Composite Films ◽  
Transport Processes ◽  
Electronic Charge ◽  
Energy Storage Devices ◽  
Protic Ionic Liquid ◽  
Practical Applications ◽  
Wave Measurements ◽  
Multi Walled Carbon Nanotubes

Electroactive films based on conducting polymers have numerous potential applications, but practical devices frequently require a combination of properties not met by a single component. This has prompted an extension to composite materials, notably those in which particulates are immobilised within a polymer film. Irrespective of the polymer and the intended application, film wetting is important: by various means, it facilitates transport processes – of electronic charge, charge-balancing counter ions (“dopant”) and analyte/reactant molecules – and motion of polymer segments. While film solvent content and transfer have been widely studied for pristine polymer films exposed to molecular solvents, extension to non-conventional solvents (such as ionic liquids) or to composite films has been given much less attention. Here we consider such cases based on polyaniline films. We explore two factors, the nature of the electrolyte (solvent and film-permeating ions) and the effect of introducing particulate species into the film. In the first instance, we compare film behaviours when exposed to a conventional protic solvent (water) with an aprotic ionic liquid (Ethaline) and the intermediate case of a protic ionic liquid (Oxaline). Secondly, we explore the effect of inclusion of physically diverse particulates: multi-walled carbon nanotubes, graphite or molybdenum dioxide. We use electrochemistry to control and monitor the film redox state and change therein, and acoustic wave measurements to diagnose rheologicallyvs.gravimetrically determined response. The outcomes provide insights of relevance to future practical applications, including charge/discharge rates and cycle life for energy storage devices, “salt” transfer in water purification technologies, and the extent of film “memory” of previous environments when sequentially exposed to different media.

Preparation and Dye Removal Properties of Hyperbranched Polymeric Ionic Liquid/Poly(Vinylidene Fluoride) Composite Films

2017 ◽  
Vol 890 ◽  
pp. 192-195
Author(s):  
Wen Qi Song ◽  
Yu Yang Liu ◽  
Yu Hou ◽  
Yan Wang
Keyword(s):  
Ionic Liquid ◽  
Vinylidene Fluoride ◽  
Dynamic Condition ◽  
Adsorption Property ◽  
Composite Films ◽  
Bromophenol Blue ◽  
Inversion Method ◽  
Pvdf Film ◽  
Polymeric Ionic Liquid ◽  
Poly Vinylidene Fluoride

Based on the selective adsorption property of the imidazolium-type hyperbranched polymeric ionic liquid (hb-PIm+PF6-) towards anionic dyes, it was incorporated into poly(vinylidene fluoride) (PVDF) matrix to modify PVDF film. The composite hb-PIm+PF6-/PVDF films were prepared via non-solvent-induced phase inversion method. The obtained composite films were characterized by attenuated total reflectance-Fourier transform infrared spectroscopy, scanning electron microscopy, and contact angle goniometry. Using bromophenol blue (BPB, an acidic dye) as the model molecule, the dynamic and static adsorption properties of the hb-PIm+PF6-/PVDF films were investigated, respectively. It is significant that the hb-PIm+PF6-/PVDF composite films could efficiently remove BPB from water under dynamic condition.

Friction and Wear of MoS2 Films on Etched Steel Surfaces

2008 ◽  
Author(s):  
V. Perfilyev ◽  
A. Moshkovich ◽  
K. Lutudjean ◽  
L. Rapoport
Keyword(s):  
Chemical Treatment ◽  
Friction And Wear ◽  
Steel Surface ◽  
Solid Lubricant ◽  
Surface Texturing ◽  
Roughness Parameters ◽  
Wear Properties ◽  
Wear Life ◽  
Steel Surfaces ◽  
Friction And Wear Properties

Surface texturing is one of modern technologies using for improvement friction and wear properties of rubbed surfaces. The simple and effective methods of surface texturing are mechanical or chemical treatments of friction surfaces. In this work we deal with chemical treatment of steel surfaces with following filling the profile by solid lubricant particles as MoS2. The steel surfaces were etched with phosphoric acid. The effect of time and temperature of etching on the surface roughness parameters was studied. Some standard roughness parameters of etched surface were measured. It was found that the parameters of roughness as Rz and Sm characterizing the depth of valleys and their size can be used for description of etched surfaces. Optimal parameters, Rz and Sm, providing the best tribological properties were determined: Rz = 5 ∼ 7 m and Sm = 50–70 m. The thickness of solid lubricant film was about 1 m. Finally, the tribological properties of MoS2 films on the steel surfaces textured by chemical treatment were performed. The friction coefficient and wear life of solid lubricant films was assessed. Friction and wear properties of MoS2 films on etched surfaces were compared with similar films on virgin steel surface. The wear life of MoS2 films on etched surfaces was 5–7 times larger than for solid lubricant film on mechanically treated steel surface.

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