Cement composites were realized containing graphene-based materials having different oxygen content (from 0 to 45%). It was found that the polarity of the reinforcement influences both the dispersion in water and the chemical interaction with the hydrated cement matrix, and thus the mechanical performance of the composites. In particular, the reinforcements with the highest oxygen content result aggregated while the cement with the highest strength is obtained with functionalized graphene, containing 5% oxygen, where the surface has sufficient polar groups to guarantee proper dispersion and interaction with the hydrated cement.

中文翻译：

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石墨烯含氧量与水泥基复合材料力学性能的关系

实现了水泥复合材料，其中包含具有不同氧含量（0至45％）的石墨烯基材料。发现增强物的极性既影响在水中的分散又影响与水合水泥基质的化学相互作用，从而影响复合材料的机械性能。特别是，含氧量最高的增强剂会聚集在一起，而含氧量为5％的功能化石墨烯则可获得强度最高的水泥，其表面具有足够的极性基团，以确保与水合水泥的适当分散和相互作用。