Diamond and Related Materials, Journal Year: 2025, Volume and Issue: 156, P. 112384 - 112384
Published: April 29, 2025
Language: Английский
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(30), P. 39896 - 39905
Published: July 16, 2024
The dispersion stability of nanomaterials in lubricants significantly influences tribological performance, yet their addition as lubricant additives often presents challenges secondary dispersion. Here, we present a straightforward method for situ preparation N,S-codoped CDs (N,S-CDs)-based using heterocyclic aromatic hydrocarbons containing N/S elements poly(ethylene glycol) (PEG) base oil by directional ultrasound strategy. Two types N,S-CDs were successfully prepared via the treatment PEG with benzothiazole (BTA) and benzothiadiazole (BTH) separately. resultant have uniform distribution N S maintain good colloidal even after 9 months storage. can enter surface gap friction pairs then induce tribochemical reaction. Benefiting from synergistic effect activating elements, robust stable protective film consisting iron sulfides, oxides, carbon nitrides, amorphous carbonaceous compounds is formed, thus endowing N,S-CDs-based improved antiwear friction-reducing performance. Compared pure PEG, coefficient (COF) N,S-CDs(BTH)-based decreased to 0.108 0.292, accompanied 91.2% reduction wear volume, maximum load carrying capacity increased 450 150 N.
Language: Английский
Citations
10
Tribology International, Journal Year: 2025, Volume and Issue: unknown, P. 110648 - 110648
Published: March 1, 2025
Language: Английский
Citations
2
Langmuir, Journal Year: 2025, Volume and Issue: unknown
Published: March 14, 2025
Herein, functionalized carbon aerogel microspheres (CAMs) were successfully prepared by the pyrolysis of resorcinol-formaldehyde (RF) followed surface modification. First, RF carbonized to obtain CAMs. Afterward, polyphenolic compound epigallocatechin gallate (EGCG) was reacted with melamine form a poly(EGCG) layer onto CAM surface, bonding antiwear molecule dialkyl dithiophosphate (DDP) Michael addition, resulting in DDP-functionalized CAMs (DDP-CAMs). The grafting DDP improved lipophilicity CAMs, enabling stable dispersion base oil 500SN for over 10 days while also enhancing their antifriction and properties. addition 1.0 wt % DDP-CAMs resulted 34.7% reduction coefficient friction 47.5% decrease wear volume. enhanced lubrication performance can be attributed synergistic effect. On one hand, protective film generated through tribo-chemical reactions. At same time, present at contact interface exhibited nanoscale rolling self-repairing
Language: Английский
Citations
1
Journal of Tribology, Journal Year: 2025, Volume and Issue: 147(6)
Published: Jan. 21, 2025
Abstract The rheological and tribological performances of waste cooking oil (WCO)-based novel sustainable grease with garlic as an extreme pressure (EP) additive were examined according to the ASTM standards (ASTM D1092 D2783) using a four-ball tester. commercially available lithium-based served reference for comparing evaluating properties WCO-based greases. addition 6% EP increased weld load from 1560 N 2450 N. average wear scar diameter WCO + (GO 6 wt%) is reduced by 13.87% 19.30%, respectively, compared that commercial (MIDCO AP-3) grease. Furthermore, viscosity shear stress higher thickener concentrations, achieving performance comparable It envisaged oil-filled base will not only have good lubricating but also pose minimum environmental hazards.
Language: Английский
Citations
0
Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 111178 - 111178
Published: April 1, 2025
Language: Английский
Citations
0
Diamond and Related Materials, Journal Year: 2025, Volume and Issue: 156, P. 112384 - 112384
Published: April 29, 2025
Language: Английский
Citations
0