To improve the dispersion of graphene nanoplatelet (GNP) in polypropylene (PP), GNP was exfoliated in a mixed solvent of p-xylene and N,N-dimethylform-amide (DMF) and the exfoliation of GNP was maintained by the addition of a compatibilizer before the melt blending. The concentration of the dispersed GNP in various ratios of the mixed solvents was measured in order to confirm the effect of the mixed solvent on the pre-treatment process. As a compatibilizer for the composite, pyrene-functionalized maleic anhydride-grafted polypropylene (Py-PP) was synthesized. The dispersion state of the composites was analyzed by the three dimensional non-destructive X-ray micro-computed tomography (3D micro-CT). The improved dispersion of GNP resulted in a significant enhancement in the mechanical properties. Young’s modulus of PP composites with 2 wt% GNP has increased by 43% compared with that of PP. These results are attributed not only to the improved interfacial interaction between PP and GNP, but also to the homogeneous dispersion state of the GNP in the matrix.

为了改善石墨烯纳米血小板（GNP）在聚丙烯（PP）中的分散性，在对二甲苯和N，N的混合溶剂中将GNP剥落-二甲基甲酰胺（DMF）和GNP的剥落通过在熔融共混之前添加相容剂来维持。测量了各种比例的混合溶剂中分散的GNP的浓度，以确认混合溶剂对预处理过程的影响。作为复合材料的增容剂，合成了pyr官能化的马来酸酐接枝聚丙烯（Py-PP）。通过三维无损X射线微计算机断层扫描（3D micro-CT）分析了复合材料的分散状态。GNP分散性的改善导致机械性能的显着提高。GNP为2 wt％的PP复合材料的杨氏模量比PP增加了43％。这些结果不仅归因于PP和GNP之间的界面相互作用得到改善，