Roll-to-roll graphene oxide radon barrier membranes

Gong, Myoung‐Seon; Cha, Jae‐Ryung; Hong, Suk Min; Lee, Cheol Min; Lee, Dong Hoon; Joo, Sang‐Woo

doi:10.1016/j.jhazmat.2019.121148

Cited by 14 publications

(5 citation statements)

References 60 publications

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“…The solution will then be dried, either at room temperature or under a heating source, thus creating the stacked morphology of GO flakes typical of these membranes. This method can be coupled to a roll-to-roll apparatus for continuous production, achieving the scalability required for industrial applications [161].…”

Section: Drop Castingmentioning

confidence: 99%

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

et al. 2023

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Graphene oxide (GO) has shown great potential as a membrane material due to its unique properties, including high mechanical strength, excellent thermal stability, versatility, tunability, and outperforming molecular sieving capabilities. GO membranes can be used in a wide range of applications, such as water treatment, gas separation, and biological applications. However, the large-scale production of GO membranes currently relies on energy-intensive chemical methods that use hazardous chemicals, leading to safety and environmental concerns. Therefore, more sustainable and greener approaches to GO membrane production are needed. In this review, several strategies proposed so far are analyzed, including a discussion on the use of eco-friendly solvents, green reducing agents, and alternative fabrication techniques, both for the preparation of the GO powders and their assembly in membrane form. The characteristics of these approaches aiming to reduce the environmental impact of GO membrane production while maintaining the performance, functionality, and scalability of the membrane are evaluated. In this context, the purpose of this work is to shed light on green and sustainable routes for GO membranes’ production. Indeed, the development of green approaches for GO membrane production is crucial to ensure its sustainability and promote its widespread use in various industrial application fields.

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Section: Drop Castingmentioning

confidence: 99%

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

et al. 2023

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“…Based on the obtained results, the authors recommended that mandatory testing be introduced for all new dwellings in Rn-affected areas. In the following years, other authors, such as Cosma et al [38], Muñoz et al [39], Khan et al [40], Burghele et al [41], Gong et al [42], Gaskin et al [43], and Sainz et al [33], presented case studies of the application of barrier membranes, including comparative analyses between different types of materials. Concerning anti-Rn mortars, most studies were found to refer to their existence, but no case studies were found where their effectiveness was analyzed.…”

Section: Literature Reviewmentioning

confidence: 99%

High Indoor Rn Concentration Mitigation in a Heritage Building: Case Study Analysis of the Applied Constructive Measures

Nunes

Curado

2023

Buildings

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Indoor radon (Rn) concentration is pointed out by the World Health Organization (WHO) as the second leading cause of lung cancer. Adopting mitigation measures based on ventilation procedures is an effective solution for most cases. However, the occurrence of abnormal concentrations of indoor Rn in heritage buildings, where most interventions are restricted, may lead to alternative remediation techniques. In these cases, constructive mitigation measures, such as the use of barrier membranes on the floor or specific coating mortars on the walls, can be adequate solutions. In the current investigation, two constructive measures were applied and analyzed sequentially. The preliminary long-term monitoring campaign registered extremely high indoor Rn concentration measurements. The application of a barrier membrane covering the floor of the test compartment allowed a 90% reduction in the average Rn concentration, but it nevertheless remained substantially above the recommended value of 300 Bq·m−3. Subsequently, a coating mortar was applied on the walls. The combined measures contributed to a total reduction of 94% in the average indoor Rn concentration, which remains slightly above the recommended exposure limit. Despite the verified reduction and the apparent effectiveness of the measures, it is still necessary to carry out more monitoring campaigns to test their general applicability.

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“…22 Gong, M. S. obtained a 222 Rn diffusion coefficient below 2.2 Â 10 À12 m 2 /s by coating a 5 μm-thick layer of graphene oxide polymer resin between two styrenebutadiene-styrene modified asphalt layers on a 100 μmthick polyethylene terephthalate (PET) film. 23 Another research paper reported a decrease of 81.9% in carbon dioxide permeability and a reduction of 83.7% in nitrogen permeability by preparing graphene/PMMA composite films using chemical vapor deposition. 24 Additionally, according to Ahmad et al, compared to pure PET, more than 99% reduction in oxygen permeability was achieved by GNPs-1.5 wt%/PET composite materials.…”

Section: Introductionmentioning

confidence: 99%

“…The barrier characteristics of polymers can be notably augmented via introduction of graphene and its derivatives which can also modify the diffusion path length of gas molecules by offering a sufficient length‐to‐diameter ratio 22 . Gong, M. S. obtained a 222 Rn diffusion coefficient below 2.2 × 10 −12 m 2 /s by coating a 5 μm‐thick layer of graphene oxide polymer resin between two styrene‐butadiene‐styrene modified asphalt layers on a 100 μm‐thick polyethylene terephthalate (PET) film 23 . Another research paper reported a decrease of 81.9% in carbon dioxide permeability and a reduction of 83.7% in nitrogen permeability by preparing graphene/PMMA composite films using chemical vapor deposition 24 .…”

Section: Introductionmentioning

confidence: 99%

Effect of modified graphene nanosheets on the properties of ²²²Rn and gamma ray multifunctional shielding polymer composite materials

Tan,

Wang,

Liu

et al. 2024

Polymer Composites

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Development of shielding materials for 222Rn and γ radiation has crucial implications for ensuring the safety of individuals. This paper reports the synthesis of modified graphene nanosheets (MGNPs) via the reaction of KH560 with graphene nanosheets (GNPs), while melt blending and hot‐press molding technique were used to fabricate a multifunctional polymer composite shielding material, MGNP/WB/PMMA (polymethyl methacrylate). Successful synthesis of MGNP was confirmed by Fourier transform infrared spectroscopy, and scanning electron microscope (SEM) analysis was utilized to assess the distribution of functional fillers within the cross‐section of the polymer composite. Additionally, thermogravimetric analysis (TGA) demonstrated that MGNP and WB particles enhance the thermal stability of the polymer composite materials. Compared to pure PMMA, 98.7% decrease in the radon diffusion coefficient was observed for MGNP1.5 wt%/PMMA composite material. In addition to enhance the radon‐blocking characteristics of the polymer composites, inclusion of WB particles also boosts their shielding capacity against gamma radiation. The 222Rn diffusion coefficient of MGNP1.5 wt%/WB25wt%/PMMA polymer composite material decreased by 99.6% and at energies of 60 KeV, 80 KeV, 122 KeV, 365 KeV, the mass attenuation coefficient (MAC) for the composite material increased by 0.79, 1.97, 0.57, and 0.05 cm2/g, respectively, compared to pure PMMA.Highlights The PMMA composite materials doped with graphene nanosheets demonstrate outstanding resistance to 222Rn. Graphene nanosheets modified by KH560 exhibit favorable dispersion within PMMA. WB can further enhance the radon resistance of MGNP/WB/PMMA composite materials. The polymer composites exhibit excellent 222Rn and gamma ray shielding properties.

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Roll-to-roll graphene oxide radon barrier membranes

Cited by 14 publications

References 60 publications

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

High Indoor Rn Concentration Mitigation in a Heritage Building: Case Study Analysis of the Applied Constructive Measures

Effect of modified graphene nanosheets on the properties of ²²²Rn and gamma ray multifunctional shielding polymer composite materials

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Roll-to-roll graphene oxide radon barrier membranes

Cited by 14 publications

References 60 publications

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

Green Methods for the Fabrication of Graphene Oxide Membranes: From Graphite to Membranes

High Indoor Rn Concentration Mitigation in a Heritage Building: Case Study Analysis of the Applied Constructive Measures

Effect of modified graphene nanosheets on the properties of 222Rn and gamma ray multifunctional shielding polymer composite materials

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Product

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Effect of modified graphene nanosheets on the properties of ²²²Rn and gamma ray multifunctional shielding polymer composite materials