Self-Secreting Organohydrogels with Adaptive Lubrication for Extreme Environments
Li Wang1,2, Yi Zeng1, Wenbing Zhou1
1The Center of Functional Materials for Working Fluids of Oil and Gas Field, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, Sichuan, China.
ACS Applied Materials & Interfaces
|July 16, 2025
Summary
Novel organohydrogels (OHGs) offer autonomous lubrication in extreme conditions. These self-secreting materials overcome traditional hydrogel limitations, providing effective lubrication in dry, wet, and subzero environments.
Area of Science:
- Materials Science
- Tribology
- Supramolecular Chemistry
Background:
- Traditional hydrogels fail in extreme environments due to water loss and freezing, limiting their lubrication capabilities.
- Self-secreting materials inspired by nature offer potential solutions for tribological challenges in harsh conditions.
Purpose of the Study:
- To develop a novel organohydrogel (OHG) system for autonomous lubrication across diverse environmental conditions.
- To investigate the temperature- and shear-responsive self-secretion capabilities of OHGs.
Main Methods:
- Integration of supramolecular organogels within a hydrogel matrix to create the OHG system.
- Evaluation of OHG lubrication performance in dry, wet, and subzero (-10 °C) conditions.
- Measurement of friction coefficient (COF) and swelling behavior compared to traditional hydrogels.
Main Results:
- OHGs demonstrated effective lubrication in dry conditions, reducing COF from 0.4 to 0.1 via self-secretion.
- Stable low-temperature lubrication (COF of 0.1) was achieved at -10 °C.
- In aqueous environments, OHGs achieved a COF of 0.07 due to combined hydration and oil-phase secretion.
- OHGs exhibited controlled hydration swelling, with equilibrium times eight times longer than conventional hydrogels, enhancing migration and sealing.
Conclusions:
- The developed OHG system overcomes the limitations of hydration-dependent hydrogels, offering robust lubrication in extreme environments.
- OHGs present a promising next-generation self-lubricating material with potential applications in oilfield development, robotics, and biomedical engineering.
- Controlled swelling and enhanced sealing performance make OHGs suitable for demanding applications like deep profile control.
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