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The relationship between solid-liquid interface interaction and gelling capacity of h-BN 2D material: a rheological
Ruochong Zhang1,2, Wenhui Cao3,4, Yu Xia1
1College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310023, Zhejiang, People's Republic of China.
Nanotechnology
|December 29, 2021
Summary
Ultrasound triggers a layer-by-layer structure in diurea modified hexagonal boron nitride (h-BN) nanosheets, enabling them to gel lubricating oils. Elasticity arises from solid-liquid interface interactions, not traditional crosslinking.
Area of Science:
- Materials Science
- Nanotechnology
- Rheology
Background:
- Diurea modified hexagonal boron nitride (h-BN) nanosheets act as 2D gelators for lubricating oils.
- Ultrasound induces a critical layer-by-layer (LBL) structure in these BN gelators.
- The elastic response mechanism in LBL structures of 2D materials remains underexplored.
Purpose of the Study:
- To investigate the viscoelastic behavior of BN-based gels formed by ultrasound.
- To elucidate the origin of elastic response in the LBL structure of 2D gelators.
- To understand the gelling mechanism of BN gelators and guide future design.
Main Methods:
- Rheological analysis of BN-based gels using a rheometer.
- Investigation of viscoelastic properties under ultrasound stimulus.
- Correlation of molecular structure with gelation and elastic response.
Main Results:
- Stable elastic response in the LBL structure is triggered by solid-liquid interface interaction.
- The diurea molecular structure regulates the interface interaction.
- Elasticity originates from interface-induced bending deformation of h-BN 2D materials.
Conclusions:
- Solid-liquid interface interaction is key for stable elasticity in ultrasound-responsive 2D gelators.
- The findings clarify the gelling mechanism of BN gelators.
- This work provides insights for designing novel 2D material-based ultrasound-responsive gelators.
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