Front Cover: In article number 2000192, Guilhermino J. M. Fechine and co‐workers analyze the influence of the superlubricity phenomenon of graphene oxide and graphite oxide agglomerates on the mechanical properties of the HMWPE. It is observed that the agglomerates, due to their superlubricity state, toughen the polyethylene and polystyrene. This image illustrates the superlubricity phenomenon of the particles during the tensile test of the composites.

中文翻译：

---

聚合物复合材料中碳填料的“超润滑状态”

前封面：Guilhermino JM Fechine及其同事在文章编号2000192中分析了氧化石墨烯和氧化石墨团聚体的超润滑现象对HMWPE力学性能的影响。观察到，由于它们的超润滑状态，附聚物使聚乙烯和聚苯乙烯增韧。该图像说明了复合材料的拉伸试验过程中颗粒的超润滑现象。