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Rolling Without Slipping
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Roll-to-roll graphene oxide radon barrier membranes
Myoung-Seon Gong1, Jae-Ryung Cha1, Suk Min Hong1
1Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center, Dankook University, Cheonan 31116, Republic of Korea.
Journal of Hazardous Materials
|September 17, 2019
Summary
Graphene oxide polymer resin membranes effectively block radon gas in buildings. This novel material, created using a roll-to-roll method, offers a promising solution for improving indoor air quality and reducing health risks.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Radon (Rn) is a radioactive gas that poses significant health risks, particularly in residential buildings and construction sites.
- Effective barriers are needed to mitigate radon exposure and its carcinogenic potential.
- Graphene-based materials show promise due to their unique structural and chemical properties.
Purpose of the Study:
- To develop and evaluate graphene oxide as a radon barrier material for living environments.
- To investigate the barrier properties of graphene oxide polymer resin (GOPR) in a multilayer membrane.
- To provide a theoretical and experimental understanding for practical applications in construction.
Main Methods:
- Fabrication of a multilayer membrane using a roll-to-roll method, incorporating a graphene oxide polymer resin (GOPR) layer between styrene-butadiene-styrene (SBS)-modified bitumen asphalt layers.
- Characterization of graphene oxide materials using infrared, Raman, and X-ray photoelectron spectroscopy (XPS).
- Computational analysis using dispersion-corrected density functional theory (DFT) to calculate binding and penetration energy barriers for radon and ambient gases.
Main Results:
- Graphene oxide materials exhibited weaker binding energies on oxide surfaces and higher penetration energy barriers for radon (Rn) compared to common atmospheric gases.
- DFT calculations confirmed higher barrier energies for Rn in graphene nanopores than for Ar, H2O, CO2, H2, O2, and N2.
- The roll-to-roll prepared graphene materials demonstrated effective barrier properties against both radon and ambient gases.
Conclusions:
- Graphene oxide polymer resin integrated into multilayer membranes serves as an effective radon barrier.
- The material's superior barrier properties for radon are supported by both experimental and theoretical findings.
- This study provides a foundation for utilizing graphene-based materials to reduce radon risks in buildings.
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