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首页> 外文期刊>Journal of Applied Polymer Science >Improving the helium gas barrier properties of epoxy coatings through the incorporation of graphene nanoplatelets and the influence of preparation techniques
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Improving the helium gas barrier properties of epoxy coatings through the incorporation of graphene nanoplatelets and the influence of preparation techniques

机译：通过掺入石墨烯纳米片和制备技术的影响来改善环氧涂层的氦气阻隔性能

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摘要

Graphene/epoxy nanocomposite coatings were formulated by applying different dispersion and preparation methods to determine whether the coatings might be a potential gas barrier material for irradiated graphite waste which is known to release radioactive gases like tritium (H-3(2)). Helium was used as a substitute gas for tritium and the gas permeability was measured with the use of a helium leak detector. The dispersion and fabrication techniques influenced the ability of the coatings to reduce the helium gas permeability. Characterization of the graphene nanoplatelets and the composite morphology showed that the graphene nanoplatelet geometry and aspect ratio were altered by the applied dispersion techniques. The results showed that incorporating 2 wt % graphene into the epoxy matrix, combined with a multilayer fabrication method, reduced the helium gas permeability by 83% when compared to the reference epoxy samples. Modeling the gas permeability according to the tortuous path theory confirmed the aspect ratios which were estimated by the microscopic methods and particle size analysis. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42584.
机译：通过应用不同的分散体和制备方法来配制石墨烯/环氧树脂纳米复合材料涂料，以确定涂料是否可能是辐照石墨废料的潜在气体阻隔材料，已知该材料会释放出放射性气体，例如tri（H-3（2））。氦气被用作gas气的替代气体，并使用氦气泄漏检测器测量了气体渗透率。分散和制造技术影响了涂层降低氦气渗透性的能力。石墨烯纳米片的表征和复合物的形态表明，石墨烯纳米片的几何形状和长宽比通过所应用的分散技术而改变。结果表明，与参考环氧树脂样品相比，将2 wt％的石墨烯掺入环氧基质中，再结合多层制造方法，可使氦气渗透率降低83％。根据曲折路径理论对气体渗透率进行建模，证实了纵横比是通过微观方法和粒度分析估算的。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42584。

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