Nano-Biochar Prepared from High-Pressure Homogenization Improves Thermal Conductivity of Ethylene Glycol-Based Coolant

Youheng Wang ^1,2,3, Xianjun Hou ^1,2,3, Hong Yu ^1,2

⁰Hubei Key Laboratory of Advanced Technology for Automotive Components, School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China.

Nanomaterials (basel, Switzerland) +

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August 9, 2024

View abstract on PubMed

Summary

Nano-biochar from sesame stalks enhances ethylene glycol

Area Of Science

Materials Science
Nanotechnology
Chemical Engineering

Background

Biochar is an eco-friendly material gaining traction for heat transfer applications.
Developing novel biochar materials is crucial for advancing thermal management solutions.

Purpose Of The Study

To prepare and characterize nano-biochar from sesame stalks.
To investigate the effects of nano-biochar addition on ethylene glycol's dispersion stability, viscosity, and thermal conductivity.
To evaluate nano-biochar's potential in automotive thermal management.

Main Methods

Nano-biochar synthesis using high-pressure homogenization (HPH) from sesame stalks.
Incorporation of nano-biochar into ethylene glycol (EG).
Evaluation of dispersion stability, viscosity, and thermal conductivity of EG-nano-biochar suspensions.

Main Results

Stable dispersion of nano-biochar in EG for at least 28 days.
Negligible impact on viscosity at nano-biochar concentrations below 1 wt.%.
A 6.72% improvement in thermal conductivity of EG with 5 wt.% nano-biochar addition.

Conclusions

Nano-biochar exhibits excellent dispersion stability in ethylene glycol.
The enhanced thermal conductivity is attributed to the nano-biochar's graphitized structure and Brownian motion.
Sesame stalk-derived nano-biochar shows promise for automotive thermal management applications.

Keywords:

dispersion stability dynamic viscosity sesame stalks thermal management system