改性氧化石墨烯/聚氨酯涂层抗风沙冲蚀性能研究
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内蒙古工业大学

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Study on Sand Erosion Resistance of Graphene Oxide/Polyurethane Coatings
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Inner Mongolia University Of Technology

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    摘要:

    基于内蒙古中西部地区钢结构设施表面涂层长期受风沙冲蚀现状,为提升涂层抗风沙冲蚀性能,增强钢结构设施在特殊环境下的耐久性,制备改性氧化石墨烯/聚氨酯涂层。使用硅烷偶联剂对氧化石墨烯进行共价键改性,并采用傅里叶红外光谱、拉曼光谱和XRD表征氧化石墨烯改性前后结构变化;对改性氧化石墨烯/聚氨酯涂层以及普通聚氨酯涂层进行力学性能测试以及模拟风沙冲蚀试验。结果表明:硅烷偶联剂成功对氧化石墨烯进行共价键改性,且改性后的氧化石墨烯在聚氨酯中有良好的分散与相容性;涂层的硬度随着改性氧化石墨烯含量的增大先增加后降低;当含量为 0.5wt.%时,涂层的冲蚀率明显降低,抗风沙冲蚀性能显著增强;试验和计算结果表明模拟特强沙尘暴冲蚀后涂层的使用寿命要比普通聚氨酯涂层延长至少0.8年。

    Abstract:

    Based on the status of long-term sand erosion on the surface coating of steel structure facilities in the central and western regions of Inner Mongolia, in order to improve the anti-sand erosion performance of the coating and enhance the durability of steel structure facilities under special circumstances, modified graphene oxide/polyurethane coating. Covalent bond modification of graphene oxide using a silane coupling agent, and Fourier transform infrared spectroscopy, Raman spectroscopy, and XRD were used to characterize the structural changes of graphene oxide before and after modification; the modified graphene oxide / polyurethane coating and Ordinary polyurethane coatings are tested for mechanical properties and simulated sand erosion tests. The results showed that the silane coupling agent successfully modified the covalent bond of graphene oxide, and the modified graphene oxide had good dispersion and compatibility in polyurethane; the hardness of the coating changed with the modified graphene oxide. The increase of the content first increases and then decreases; when the content is 0.5wt.%, The erosion rate of the coating is significantly reduced, and the anti-sand erosion performance is significantly enhanced; the test and calculation results show that the simulation of the coating after the super strong sand storm erosion The service life is extended by at least 0.8 years compared to ordinary polyurethane coatings.

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  • 收稿日期:2020-01-13
  • 最后修改日期:2020-03-30
  • 录用日期:2020-04-08
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