Enhanced thermal transport through a soft glassy nanodisk paste

Area of Science:

• Colloid and Surface Science
• Soft Matter Physics
• Nanoparticle Heat Transfer

Background:

• Laponite suspensions exhibit soft glassy rheology and constrained particle motion.
• Understanding heat transport in such complex fluids is crucial for various applications.
• Previous studies have not fully explored the thermal diffusivity of these specific nanoparticle systems.

Purpose of the Study:

• To investigate heat diffusion in aqueous Laponite nanoparticle suspensions.
• To quantify the thermal diffusivity of these soft glassy materials.
• To correlate observed thermal properties with suspension microstructure.

Main Methods:

• Utilizing Mach-Zehnder interferometry to study heat diffusion.
• Measuring temperature distribution experimentally.
• Comparing experimental data with analytical solutions to estimate thermal diffusivity.
• Analyzing the influence of Laponite concentration on thermal properties.

Main Results:

• Observed significant enhancement in thermal diffusivity at very low Laponite concentrations.
• Despite constrained Brownian motion, thermal diffusivity is notably improved.
• A correlation between enhanced thermal diffusivity and Laponite suspension microstructure was identified.

Conclusions:

• Aqueous Laponite suspensions can significantly enhance thermal diffusivity.
• The observed enhancement is linked to the unique microstructure of these soft glassy materials.
• This finding opens avenues for utilizing Laponite in thermal management applications.