首页|Solvent-free carbon sphere nanofluids towards intelligent lubrication regulation

Solvent-free carbon sphere nanofluids towards intelligent lubrication regulation

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By simply switching the electrical circuit installed on steel/steel contact,the tribological behaviors of nanofluids(NFs)can be regulated in real time,thereby achieving the desired performance of friction reduction and wear resistance.Herein,solvent-free carbon spherical nanofluids(C-NFs)were successfully prepared for intelligent lubrication regulation.C-NFs with excellent lubrication performance can immediately reduce the coefficient of friction(COF)despite applying a weak electric potential(1.5 V).Moreover,polyethylene glycol 400(PEG400)containing 5.0 wt%C-NFs remained responsive to electrical stimulation under the intermittent voltage application with an average coefficient of friction(ACOF)reduction of 20.8%over PEG400.Such intelligent lubrication regulation of C-NFs under an external electric field(EEF)mainly depends on the orderly arranged double-electric adsorption film of ion canopy-adsorbed carbon spheres(CSs).The intermittent electrical application can continuously reinforce the adsorption film and its durability for real-time controlling the sliding interfaces.Electrical-stimulation-responsive intelligent lubricants provide a new technical support for realizing intelligent stepless control of devices.

solvent-free carbon spherical nanofluids(C-NFs)intelligent lubrication regulationlubrication performanceadsorption film

Sheng ZHANG、Wen LI、Xiaoliang MA、Xiaoqiang FAN、Minhao ZHU

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Tribology Research Institute,School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China

Key Laboratory of Advanced Technologies of Materials,Ministry of Education,School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaUniversity-Industry Collaborative Education Program,Fundamental Research Funds for the Central UniversitiesAnalysis&Testing Center of Southwest Jiaotong University,China,for supporting the SEM measurements

52075458U21412112682021CG008

2024

10.1007/s40544-023-0737-7

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CSTPCD北大核心EI
ISSN：2223-7690
年,卷(期)：2024.12(1)
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