Friction Reduction Mechanism of Aqueous Hydroxyethyl Cellulose Solution Enhanced by Synergistic Effect of APTES

2021 ◽  
Vol 70 (1) ◽  
Author(s):  
Dezun Sheng ◽  
Hongliang Yu ◽  
Hongyue Li ◽  
Jinxi Zhou ◽  
Huichen Zhang ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Friction Reduction ◽  
Hydroxyethyl Cellulose ◽  
Cellulose Solution ◽  
Reduction Mechanism

scholarly journals Tribology Properties of Synthesized Multiscale Lamellar WS2 and Their Synergistic Effect with Anti-Wear Agent ZDDP

2019 ◽  
Vol 10 (1) ◽  
pp. 115 ◽  
Author(s):  
Na Wu ◽  
Ningning Hu ◽  
Jinhe Wu ◽  
Gongbo Zhou
Keyword(s):  
Friction Coefficient ◽  
Synergistic Effect ◽  
Solid Phase ◽  
Friction Reduction ◽  
Lubricating Oil ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
Wear Properties ◽  
Base Oil ◽  
Electron Probe Micro Analyzer

The microscale/nanoscale lamellar-structure WS2 particles with sizes of 2 µm and 500 nm were synthesized by solid-phase reaction method and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The synergies between microscale/nanoscale WS2 particles and ZDDP as lubricating oil additives was evaluated by means of UMT-2 tribometer at room temperature. The wear scars were examined with SEM and electron-probe micro-analyzer (EPMA). The results show that the anti-wear properties were improved and the friction coefficient was greatly decreased with the simultaneous addition of WS2 particles and ZDDP, and the largest reduction of friction coefficient was 47.2% compared with that in base oil. Moreover, the presence of ZDDP additive in the lubricant further enhances the friction-reduction and anti-wear effect of microscale/nanoscale WS2. This confirms that there is a synergistic effect between WS2 particles and ZDDP.

scholarly journals Time Resolved PIV Investigation on the Skin Friction Reduction Mechanism of Outer-Layer Vertical Blades Array

2014 ◽  
Vol 7 (2) ◽  
pp. 901421
Author(s):  
Seong Hyeon Park ◽  
Nam Hyun An ◽  
Hyun Sik Yoon ◽  
Hyun Park ◽  
Ho Hwan Chun ◽  
...  
Keyword(s):  
Skin Friction ◽  
Outer Layer ◽  
Friction Reduction ◽  
Reduction Mechanism ◽  
Time Resolved ◽  
Skin Friction Reduction

scholarly journals PIV Investigation on the Skin Friction Reduction Mechanism of Outer-layer Vertical Blades

2011 ◽  
Vol 9 (1) ◽  
pp. 20-28 ◽  
Author(s):  
Hyun Park ◽  
Nam-Hyun An ◽  
Seong-Hyoen Park ◽  
Ho-Hwan Chun ◽  
In-Won Lee
Keyword(s):  
Skin Friction ◽  
Outer Layer ◽  
Friction Reduction ◽  
Reduction Mechanism ◽  
Skin Friction Reduction

Tribological Performances and Friction Reduction Mechanism of N-Al2O3/FeS Solid Lubrication Duplex Layer

2010 ◽  
Vol 146-147 ◽  
pp. 243-247 ◽  
Author(s):  
Chun Hua Hu ◽  
Qiu Pu Liu ◽  
Feng Jiang ◽  
Shi Ning Ma ◽  
Yu Lin Qiao ◽  
...  
Keyword(s):  
Loading Condition ◽  
Friction And Wear ◽  
Liquid Paraffin ◽  
Friction Reduction ◽  
Solid Lubrication ◽  
Oil Lubrication ◽  
Reduction Mechanism ◽  
Nano Scale ◽  
Paraffin Oil ◽  
Dipping Process

FeS solid lubrication duplex layer was prepared on the surface of 45 steel by ion nitrocarburizing-ion sulphurizing process. The sulphide grains in micron and nano scale and holes distributing equably on the duplex layer. The n-Al2O3 particles in liquid paraffin oil were set into the holes in micron and nano scale of the duplex layer by using vacuum dipping process to prepare the n-Al2O3/FeS solid lubrication duplex layer. Friction and wear performances of the n-Al2O3/FeS solid lubrication duplex layer were investigated to be excellent under different loads and temperatures. The causes are as follows: the solid lubrication function of FeS solid lubrication duplex layer, the “micron nano bearing” function of the nanoparticles embedded in the micron nano pores of FeS solid lubrication duplex layer, and oil lubrication are integrated by nanoparticles/FeS solid lubrication duplex layer and exert synergic lubrication function under high temperature and over loading condition. so the coefficients of friction and volume loss of the n-Al2O3/FeS solid lubrication duplex layer under load 60N and temperature 150°C are 10% and 31.3% lower than those of the FeS solid lubrication duplex layer lubricated by the n-Al2O3 additive, respectively.

First-principles molecular dynamics study on the surface chemistry and nanotribological properties of MgAl layered double hydroxides

Nanoscale ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 5014-5025
Author(s):  
Nam V. Tran ◽  
A. Kiet Tieu ◽  
Hongtao Zhu
Keyword(s):  
Molecular Dynamics ◽  
Surface Chemistry ◽  
Layered Double Hydroxides ◽  
First Principles ◽  
Friction Reduction ◽  
Reduction Mechanism ◽  
Double Hydroxides ◽  
First Principles Molecular Dynamics

Friction reduction mechanism of layered double hydroxides (LDHs).

scholarly journals Tribological performance of organic molybdenum in the presence of organic friction modifier

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0252203
Author(s):  
Weiwei Wang ◽  
Zhuangzhuang Liu ◽  
Qimin Song ◽  
Xindi Zhang ◽  
Shengkai Jiao ◽  
...  
Keyword(s):  
High Temperature ◽  
Friction Coefficient ◽  
Low Temperature ◽  
Synergistic Effect ◽  
Tribological Performance ◽  
Friction Reduction ◽  
Ring Test ◽  
Friction Modifiers ◽  
Friction Modifier ◽  
Glycerol Monooleate

The tribological performance of organic molybdenum in the present of organic friction modifier was investigated in this study. Three types of organic friction modifiers were selected, which are Glycerol monooleate, Pentaerythritol and N,N-Dimethylhexadecylamine. The organic molybdenum are MoDTC, MoDDP and molybdenum amide. Friction coefficient and wear were studied in block-on-ring test rig with steel test specimens. Experimental results indicate the Pentaerythritol shows synergistic effect with MoDTC in wide range temperature, while increased the friction coefficient of molybdenum amide in high temperature. N,N-Dimethylhexadecylamine shows synergistic effect with molybdenum amide, while hindered the friction reduction performance of MoDTC in low temperature. The presence of Glycerol monooleate reduced friction coefficient of MoDTC in low temperature, while increased the friction coefficient of molybdenum amide in most situations. All the tested organic friction modifiers improved the friction reduction performance of MoDDP. Most of the tested organic friction modifiers reduced the wear of organic molybdenum. The PT shows the best anti-wear performance with MoDTC. The tribo-chemical products in test specimens lubricated with different lubricant formulas indicate that the presences of Pentaerythritol promotes the production of MoS2 in MoDTC. N,N-Dimethylhexadecylamine promotes the production of MoS2 in molybdenum amide. The side products of MoO1.6S1.6 and Cr/MoS2 of MoDDP in high temperature lead to high friction coefficient.

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