High-grip and hard-wearing graphene reinforced polyurethane coatings
High-grip and hard-wearing graphene reinforced polyurethane coatings
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DOI：
10.1016/j.compositesb.2021.108727
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发表时间：
2021-02
影响因子：
13.1
通讯作者：
Monica Alberto;Maria Iliut;Mohan Kumar Pitchan;J. Behnsen;A. Vijayaraghavan
中科院分区：
文献类型：
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作者：
Monica Alberto;Maria Iliut;Mohan Kumar Pitchan;J. Behnsen;A. Vijayaraghavan
液体聚氨酯（PU）树脂用于形成防滑表面涂层。在这项工作中，我们加强聚氨酯树脂膜与几层石墨烯（FLG）纳米粒子纳入高剪切混合。该过程提供了优异的分散性，如通过光学和X射线层析成像所证明的。FLG不会明显改变PU的拉伸强度或海岸硬度，但我们报告了撕裂强度和杨氏模量适度增加10%，伴随着断裂伸长率的类似降低。然而，在耐磨性方面观察到超过100%的显著改善。同时，我们报告静摩擦系数增加25%，动摩擦系数增加200%。这些结果综合起来表明，石墨烯可以显著提高PU防滑涂层的抓地力和耐久性，而不会显著影响涂层的其他机械性能。
Liquid polyurethane (PU) resins are used to form anti-slip surface coatings. In this work, we reinforce PU resin films with few-layer graphene (FLG) nanoparticles incorporated by high-shear mixing. This process gives excellent dispersion as evidenced by optical and X-ray tomography. The FLG does not appreciably change the tensile strength or Shore hardness of the PU, but we report modest increase of 10% in tear strength and Young's modulus, accompanied by a similar decrease in elongation to failure. However, significant improvement of over 100% is observed in the abrasion resistance. At the same time, we report a 25% increase in the coefficient of static friction and 200% increase in the coefficient of dynamic friction. These results, taken together, suggests that graphene can significantly improve the grip and durability of PU anti-slip coatings, without significantly affecting the other mechanical properties of the coating.