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Liquid Crystal Interface Engineering Enhances Thermal Conduction for Efficient Thermal Management
Bing Yao1, Xiang Li1, Xiaofan Liang1
1School of Low-Carbon Energy and Power Engineering, China University of Mining and Technology, Xuzhou, Jiangsu221116, China.
ACS Applied Materials & Interfaces
|August 13, 2026
Summary
Researchers developed liquid crystal-modified graphene for advanced heat dissipation materials. This strategy enhances thermal conductivity and stability in aramid composite films for electronics.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- High-power electronics require materials with superior thermal conductivity, flexibility, and stability for effective heat dissipation.
- Existing materials often face limitations in interfacial compatibility and thermal resistance, hindering performance.
Purpose of the Study:
- To engineer a novel interface strategy using liquid crystal (LC)-modified graphene for aramid composite films.
- To enhance thermal management properties of aramid-based materials for integrated electronics.
Main Methods:
- Fabrication of aramid composite films using liquid crystal (LC)-modified graphene via interface engineering.
- Confirmation of LC anchoring on graphene using density functional theory (DFT).
- Investigation of interfacial thermal resistance (ITR) suppression using molecular dynamics (MD) simulations.
Main Results:
- LC modification improved interfacial compatibility between graphene and aramid without lattice damage.
- MD simulations showed LC interlayers effectively suppressed ITR by enhancing frequency matching and vibrational coupling.
- Composite films achieved a maximum in-plane thermal conductivity of 15.39 W·m-1·K-1 (40 wt% LC-graphene), 6.36 times higher than pure aramid nanofiber (ANF) films.
- The film demonstrated excellent thermal stability (>450 °C) and mechanical strength (101 MPa).
- Reduced operating temperatures of circuits and LEDs by ~25 °C compared to commercial pads.
Conclusions:
- The liquid crystal-modified graphene interface engineering strategy is a promising approach for developing high-performance thermal management composites.
- This method offers an effective solution for heat dissipation challenges in high-power integrated electronics.
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