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Self-Heating Graphene Nanocomposite Bricks: A Case Study in China.

Zhuo Tang1,2,3, Dong Lu2,3, Jing Gong1

  • 1School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China.

Materials (Basel, Switzerland)
|February 9, 2020
PubMed
Summary

Researchers developed novel graphene nanocomposite bricks for efficient indoor heating. These bricks offer improved strength and can reach up to 160°C, significantly enhancing energy utilization in cold climates.

Keywords:
energy consumptiongraphene oxidenanocomposite bricksself-heating

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Area of Science:

  • Materials Science
  • Energy Engineering
  • Nanotechnology

Background:

  • Indoor heating in cold climates consumes substantial energy, necessitating efficiency improvements for economic and environmental benefits.
  • Traditional water pipeline heating systems are common in China, but direct electrical-to-thermal energy conversion offers potential savings.
  • Fired bricks, widely used in construction, present an opportunity for integration with advanced materials.

Purpose of the Study:

  • To develop graphene nanocomposite bricks for efficient electrical heating applications.
  • To enhance the mechanical properties and electrical conductivity of traditional fired bricks.
  • To evaluate the thermal performance and efficiency of the novel composite bricks.

Main Methods:

  • Graphene oxide (GO) was dispersed in water and incorporated into fired brick manufacturing.
  • The electrical properties, compressive strength, and thermal performance of the nanocomposite bricks were tested.
  • Varying concentrations of GO were used to optimize material properties and heating capabilities.

Main Results:

  • Compressive strength increased from 3.15 MPa to 7.21 MPa with 0.1 wt.% GO.
  • Nanocomposite bricks reached 60°C, 110°C, and 160°C at 3 wt.%, 4 wt.%, and 5 wt.% GO, respectively, using a 5V electrical field within 5 minutes.
  • A low percolation threshold (~0.5 wt.%) and high conductivity (10 Ω·cm at 1 wt.%) were observed.
  • Thermal efficiency reached up to 88%.

Conclusions:

  • Graphene nanocomposite bricks offer a promising solution for energy-efficient indoor heating.
  • The integration of GO significantly improves both mechanical and electrical properties of bricks.
  • These materials demonstrate high thermal efficiency and rapid heating capabilities, suitable for cold climate applications.