螺旋石墨烯/环氧树脂复合材料的力学性能

Mechanical Properties of Helical Graphenes/Epoxy Composites

采用分子动力学方法研究了螺旋石墨烯/环氧树脂复合材料(HGs/epoxy)的力学性能,并和纯环氧树脂体系(epoxy)进行了比较。结果表明,与epoxy体系相比,相同交联度的HGs/epoxy体系具有更高的杨氏模量。此外,螺旋石墨烯内外径的大小对HGs/epoxy体系整体力学性能也有显著的影响。通过调整螺旋石墨烯的内外径,HGs/epoxy体系沿X、Y、Z方向的杨氏模量分别能达到3.93、4.18和3.65 GPa,相对于epoxy体系提高了42.91%,52%和32.73%。由于极性基团的相互作用,氧化螺旋石墨烯与环氧树脂基体间存在着更强的界面结合能力,这有助于提高HGs/epoxy复合材料的整体力学性能。为制备新型环氧树脂基复合材料提供了理论支撑。

The mechanical properties of helical graphenes/epoxy resin composites(HGs/epoxy)were investigated by molecular dynamics method and comparing with those of pure epoxy resin systems(epoxy).The results show that HGs/epoxy systems have higher Young’s modulus than pure epoxy systems with the same crosslinking degree.In addition,the inner and outer diameters of HGs also significantly affect the overall mechanical properties of HGs/epoxy system.By adjusting the inner and outer diameters of HGs,Young’s modulus along the X,Y,and Z directions could reach 3.93,4.18,and 3.65 GPa,increasing by 42.91%,52%,and 32.73%comparing with the epoxy system.Due to the interaction of polar groups,there is a stronger interfacial binding energy between the epoxy resin matrix and oxidized HGs,which contributes to the improvement of the overall mechanical properties of HGs/epoxy composites.These results provide the theoretical supports for the preparation of novel epoxy resin matrix composites.