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Magnetically Reconfigurable Wettability-Adhesion Coupling for Adaptive Lubrication.

Xinrui Li1, Xiaoqiang Fan1, Yihan Zhang1

  • 1Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|January 8, 2026
PubMed
Summary

This study introduces a magnetic strategy for adaptive lubrication, controlling wettability, adhesion, and friction using magneto-responsive lubricants. This enables reversible droplet manipulation and tunable friction for advanced applications.

Keywords:
adaptive lubricationinterfacial reconfigurationmagneto‐responsivereversible wettabilitytunable adhesion

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Tribology

Background:

  • Adaptive lubrication requires dynamic control over surface properties like wettability and adhesion, which is challenging with current rigid or chemically fixed systems.
  • External field-driven manipulation of interfacial properties offers a promising avenue for responsive lubrication systems.

Purpose of the Study:

  • To develop a magnetically reconfigurable lubrication strategy using magneto-responsive lubricants and oleophobic surfaces.
  • To achieve field-driven modulation of wettability, adhesion, and friction for adaptive lubrication.

Main Methods:

  • Integration of magneto-responsive lubricants with oleophobic surfaces.
  • Utilizing magnetic actuation to induce nanoparticle assembly and generate directional magnetic forces.
  • Quantifying wetting transitions, interfacial pinning, adhesion forces, and friction coefficients under magnetic fields.

Main Results:

  • Magnetic actuation reconfigured droplet morphology, reducing apparent contact angle from 153° to 114° and expanding wetted area.
  • Interfacial pinning hysteresis increased from 5° to 42°, enabling reversible droplet manipulation.
  • Reversible adhesion up to 12 N and tunable friction (coefficient 0.15–0.55, torque 0.005–0.10 N·m) were achieved via magnetic control.

Conclusions:

  • A quantitative, field-driven framework for magnetically regulated interfacial control in lubrication was established.
  • The strategy enables adaptive lubrication for applications like robotic joints, adaptive bearings, and precision motion systems.