Journal article
Self-Heating Graphene Nanocomposite Bricks: A Case Study in China
Materials, Vol.13(3), p.714
02/01/2020
Handle:
https://hdl.handle.net/2376/119787
PMCID: PMC7040689
PMID: 32033320
Abstract
In cold climate regions, the energy associated with indoor heating constitutes a large portion of energy consumption. Increasing energy utilization efficiency is critically important for both economic and environmental reasons. Directly converting electrical energy to thermal energy using joule heating construction elements can save energy and investment to the water pipelines which have been extensively used for indoor heating in China. The fired brick has been extensively used to make pavements, walls and other masonry. Taking advantage of the high dispersion quality of graphene oxide (GO) in water, as well as the firing process used to make fired bricks, graphene nanocomposite bricks with excellent electrical properties and improved mechanical performance were prepared in China. The compressive strength of the bricks showed a substantial increase from 3.15 MPa to 7.21 MPa when GO concentration was 0.1 wt.%. Through applying 5 volts of electrical field within 5 minutes, the nanocomposites can be heated from room temperature to 60 °C, 110 °C and 160 °C for the nanocomposite bricks with graphene concentration of 3 wt.%, 4 wt.% and 5 wt.%, respectively, due to the extremely low percolation threshold (~0.5 wt.%) and high conductivity (10 Ω·cm at 1 wt.%). The sheets were connected more tightly when the GO content was increased. The thermal efficiency can reach up to 88% based on the applied voltage, measured resistance and temperature rise curves.
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Details
- Title
- Self-Heating Graphene Nanocomposite Bricks: A Case Study in China
- Creators
- Zhuo Tang - School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, ChinaDong Lu - Key Lab of Structure Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, Heilongjiang, ChinaJing Gong (Author) - School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, ChinaXianming Shi - Department of Civil & Environmental Engineering, Washington State University, P.O. Box 642910, Pullman, WA 99164-2910, USAJing Zhong (Author) - Key Lab of Structure Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Harbin 150090, Heilongjiang, China
- Publication Details
- Materials, Vol.13(3), p.714
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- MDPI
- Identifiers
- 99900612856001842
- Language
- English
- Resource Type
- Journal article