scholarly journals Study on Lubrication and Friction Reduction Properties of ZIF-8 Nanoparticles as Si3N4 Ceramic Water Lubrication Additives

2021 ◽  
Vol 9 ◽  
Author(s):  
Tianyi Sui ◽  
Lichao Li ◽  
Bin Lin ◽  
Yuhang Zhang ◽  
Benyang Zhang ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Metal Organic Framework ◽  
Energy Dispersive Spectrometer ◽  
Solution Concentration ◽  
Water Lubrication ◽  
Friction Reduction ◽  
Ceramic Surface ◽  
Friction Mechanism ◽  
Framework Materials ◽  
Whole Process

Ceramics can achieve superlubricity under water lubrication; however, their running-in period is long and application is rather limited by wear limit. Thus, zeolite imidazole ester skeleton (ZIF), an important branch of metal organic framework materials (MOFs), is expected to improve the tribological properties of lubricants and associated additives. As such, it has broad application prospects within the field. In this paper, ZIF-8 nanoparticles of varying concentrations were prepared and linked with amino functional groups. Specimens were used in silicon nitride self-matching pairs and their tribological properties were observed. After the experiment, friction surfaces were analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), and Fourier transform infrared radiation (FTIR). The experimental results have shown that ZIF-8 nanoparticles greatly reduced both friction and wear. Comprehensively considering running-in time, average COF during the whole process and smooth friction period COF, optimal performance was obtained for the ZIF-8 nanoparticle solution concentration of 1wt%. Furthermore, it was concluded that the lubrication properties of amino-modified ZIF-8 nanoparticles are significantly better compared to that of the unmodified ZIF-8. The anti-friction mechanism of ZIF-8 as a ceramic water lubrication additive was mainly through the filling and forming of nanoparticle film on the ceramic surface.

Metal–organic frameworks for radionuclide sequestration from aqueous solution: a brief overview and outlook

2017 ◽  
Vol 46 (47) ◽  
pp. 16381-16386 ◽  
Author(s):  
Chengliang Xiao ◽  
Mark A. Silver ◽  
Shuao Wang
Keyword(s):  
Aqueous Solution ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Framework Materials ◽  
Metal Organic ◽  
Organic Framework

137Cs, 90Sr, 238U, 79Se, and 99Tc sequestrations from aqueous solution by metal–organic framework materials are summarized in this Frontier article.

Study of Tribological Properties of Textured Boron-Doped Diamond Film under Water Lubrication

2021 ◽  
Vol 23 ◽  
pp. 100983
Author(s):  
Daohui Xiang ◽  
Zhiqiang Zhang ◽  
Yanbin Chen ◽  
Yongwei Hu ◽  
Xiaofei Lei
Keyword(s):  
Tribological Properties ◽  
Diamond Film ◽  
Water Lubrication ◽  
Boron Doped Diamond ◽  
Boron Doped

Hierarchical Porous Metal-Organic Framework Materials for Efficient Oil-Water Separation

2022 ◽  
Author(s):  
HANEESH SAINI ◽  
Eva Otyepková ◽  
Andreas Schneemann ◽  
Radek Zboril ◽  
Michal Otyepka ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Porous Metal ◽  
Water Separation ◽  
Framework Materials ◽  
Quality Of Water ◽  
Global Issue ◽  
Hierarchical Porous ◽  
Oil Water Separation ◽  
Metal Organic

Oil contaminated water is a global issue, decreasing the quality of water sources and is posing a threat to the health of humans and many ecosystems. The utilization of industrial...

scholarly journals Study of van der Waals bonding and interactions in metal organic framework materials

2014 ◽  
Vol 26 (13) ◽  
pp. 133002 ◽  
Author(s):  
Sebastian Zuluaga ◽  
Pieremanuele Canepa ◽  
Kui Tan ◽  
Yves J Chabal ◽  
Timo Thonhauser
Keyword(s):  
Metal Organic Framework ◽  
Van Der Waals ◽  
Framework Materials ◽  
Metal Organic ◽  
Organic Framework

Preparation and tribological properties of a microemulsion for magnesium alloy warm rolling

2019 ◽  
Vol 71 (1) ◽  
pp. 74-82 ◽  
Author(s):  
Chang Dong ◽  
Jianlin Sun ◽  
Zixuan Cheng ◽  
Yuqing Hou
Keyword(s):  
Magnesium Alloy ◽  
Surface Morphology ◽  
Tribological Properties ◽  
Warm Rolling ◽  
Friction Reduction ◽  
Alloy Strip ◽  
Lubrication Mechanism ◽  
Content Type ◽  
Rolling Oil ◽  
Lubrication Properties

Purpose The purpose of this paper is to synthesize a microemulsion and investigate its tribological properties as lubricant. Magnesium alloy warm rolling experiments were conducted. Surface morphology was observed and wear form was summarized. The composition of surface residues was analyzed, which sheds light on the lubrication mechanism of microemulsion. Design/methodology/approach A microemulsion was prepared with a proper amount of oil, surfactant, cosurfactant, water and other additives for magnesium alloy strip warm rolling. Tribological properties, such as maximum non-seizure load (PB), friction coefficient (μ) and wear scar diameter (D) of the microemulsion were measured and compared with those of emulsion and rolling oil on an MR-10A four-ball tribotester. The extreme pressure anti-wear coefficients (O) were calculated and compared. Warm rolling experiments were carried out on a Ф 170/400 × 300 mm four-high rolling mill at 240°C to compare the finish rolling thickness and surface quality of rolled AZ31B magnesium alloy strip under four lubrication states, namely, no lubrication, rolling oil, microemulsion and emulsion. The surface morphology after warm rolling was observed with confocal laser scanning microscope and scanning electron microscope, respectively. The composition of surface residues was analyzed with energy dispersive spectrometry and X-Ray photoelectron spectroscopy. Findings Surface morphology indicated that pitting wear, adhesive wear and ploughing wear were three main forms of wear in magnesium alloy warm rolling. Microemulsion had excellent lubrication properties with less residual oil remaining. Two types of adsorption layers formed on magnesium alloy strip surface were responsible for lubrication properties. MgSO4 and magnesium stearate in the reaction layer played a key role in anti-wear and friction-reduction in warm rolling. Originality/value The study is original and gives valuable information on lubrication mechanism of microemulsion in warm rolling of magnesium alloy strips.

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