Effect of Adding MoDTC on the Properties of Carbon Black Rubber and the Friction and Wear of Metal during Mixing Process

Pan, Yi; Han, Deshang; Zhu, Lin; Zhang, Meng; Bian, Huiguang; Wang, Chuansheng; Han, Wenwen

doi:10.3390/ma13051071

Cited by 7 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is known that the beneficial effect of this class of organo-molybdenum compounds resides in the possibility to generate layers of molybdenum disulfide (MoS 2 ) in tribological conditions . Recent works regarding MoDTC complexes have demonstrated their capability to reduce friction also at metal/diamond-like–carbon and metal/rubber contacts, − and promising applications have been described in combination with textured metallic surfaces and nanoparticles. , While wide experimental research has been carried out to describe the chemical and tribological behavior of MoDTC in engine oils and its interaction with ZnDTP, − little attention has been paid to the fundamental steps of the tribochemical reaction that forms the beneficial MoS 2 tribolayers. The first elementary step of this reaction is the dissociation of the molecule into two separate fragments.…”

Section: Introductionmentioning

confidence: 99%

Tribochemical Reactions of MoDTC Lubricant Additives with Iron by Quantum Mechanics/Molecular Mechanics Simulations

et al. 2020

View full text Add to dashboard Cite

The remarkable lubricant properties of molybdenum dithiocarbamates (MoDTCs) make this class of oil additives well-known in the automotive industry. However, the mechanism of function of these compounds is still not completely understood at the atomistic level. We provide new insights into the dissociation of MoDTCs in tribological conditions, which are the key to describe the debated mechanism to form MoS2. Quantum mechanics/molecular mechanics (QM/MM) dynamic simulations allowed us to monitor in real time the tribochemical reactions occurring at the iron interface and revealed that the presence of the iron substrate and the mechanical stresses alter the dissociation path with respect to what is expected for the isolated MoDTC molecules. Moreover, they uncovered the important role of molecular oxidation on the dissociation pattern: the presence of oxygen atoms in the ligand position of MoDTCs favors the release of the central units of the molecules, containing just Mo and S atoms with the correct stoichiometry to form MoS2. This work demonstrates how the predictive power of ab initio simulations can be very valuable to design new lubricant additives.

show abstract

Section: Introductionmentioning

confidence: 99%

Tribochemical Reactions of MoDTC Lubricant Additives with Iron by Quantum Mechanics/Molecular Mechanics Simulations

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The rolling friction coefficient increases with the acceleration of speed, and as the intensity of the magnetic field increases, the rolling friction coefficient also increases to a certain extent. As metal-rubber [22,23] is a common friction pair in the industry, the copper ball-MRE is selected as the friction pair to explore the influence of the magnetic field on the rolling friction coefficient in dry and wet environments. The rolling friction coefficients of the copper balls as friction pairs under different magnetic fields are shown in Figure 4a.…”

Section: Resultsmentioning

confidence: 99%

Study on the Magnetic Field‐Dependent Rolling Friction Coefficient Compensation of Magnetorheological Elastomer–Copper Ball Friction Pair with Wet Interfaces

Gou

et al. 2021

Adv Eng Mater

View full text Add to dashboard Cite

Inline noncontact compensation of the declining rolling friction coefficient (f r) of rolling rotating equipment in contaminated conditions is still a challenge. Herein, it is verified that f r of magnetorheological elastomers (MREs) under common industrial pollution can be real‐time contactless compensation by magnetic field. Experimental results show that the MRE–copper ball friction pair in water medium has the best effect of magnetic field induction linear compensation, whose nonlinear error is only 1.93%. Particularly, the magnetic field‐induced f r of MRE coated with water can compensate to 95% of that of dry surface without magnetic field (K 0) at magnetic field of 50 mT. And even‐coated edible blended oil or engine oil surface, f r can be compensated by 90% of K 0 at 150 mT. The mechanism of magnetic field‐induced rolling friction compensation is that the magnetic field causes the MRE to become hard and partially rough, thereby increasing the f r; water has the smallest apparent viscosity, leading to an optimal compensation effect. It is considered that water is a common pollutant in the industry and has excellent heat dissipation properties. It is anticipated that this research provides a method of linear contactless compensation, f r, and improves the service life of the equipment.

show abstract

“…Kaushik Pal [6] studied the effect of fillers on the rubber's alloy morphology and wear characteristics. Accordingly, it was found that ISAF N234 significantly improves the tire's curing, mechanical, and thermal characteristics.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Different Dosages of TESPT on Metal Friction and Metal Wear in the Mixing Process

Han

Wang

et al. 2022

Polymers

Self Cite

View full text Add to dashboard Cite

Studies show that the dispersion of silica in the mixing process is an important factor affecting the wear of the mixing chamber. As the most important mixing equipment, the long operational life of the internal mixer will cause wear in the rotor and chamber of the internal mixer. This wear increases the gap between the rotor and chamber of the internal mixer, reduces the mixing performance, weakens the dispersion of packing, and adversely affects the quality of the rubber produced. Therefore, it is important to investigate the metal wear in the mixing process. This article examines the effect of the addition of different amounts of silane coupling agents on metal friction and wear during the mixing process. The silane coupling agent has two functions. The first is to make the surface of the silica hydrophobic, enabling it to combine the inorganic matrix of the silica with the organic matrix of the rubber; the second is to inhibit the aggregation of the silica in the rubber. In the present study, we examine (1) the influence of different formulations on the friction and wear of the metal in the mixing chamber from the perspective of formulation technology, and (2) the correlation between corrosion wear and abrasive wear. It is found that a rubber compound with 6 phr of TESPT has the lowest metal wear and that adding more TESPT does not affect the degree of metal wear. As the amount of TESPT increases, the proportion of abrasive wear decreases, while the proportion of corrosive wear increases, reaching a maximum of 20.7%. In our study we found that abrasive wear is the predominant wear mechanism of a rubber compound on metal. In contrast, the corrosive wear caused by high-temperature water vapor still occupies a large proportion of the total wear. Therefore, improving silica dispersion and reducing abrasive wear are extremely important methods to protect the mixing chamber. However, the corrosion of metals by high-temperature water vapor should also be considered when preparing for the mixing process.

show abstract

Effect of Adding MoDTC on the Properties of Carbon Black Rubber and the Friction and Wear of Metal during Mixing Process

Cited by 7 publications

References 11 publications

Tribochemical Reactions of MoDTC Lubricant Additives with Iron by Quantum Mechanics/Molecular Mechanics Simulations

Tribochemical Reactions of MoDTC Lubricant Additives with Iron by Quantum Mechanics/Molecular Mechanics Simulations

Study on the Magnetic Field‐Dependent Rolling Friction Coefficient Compensation of Magnetorheological Elastomer–Copper Ball Friction Pair with Wet Interfaces

The Effect of Different Dosages of TESPT on Metal Friction and Metal Wear in the Mixing Process

Contact Info

Product

Resources

About