Atif Rasheed, Inam Fawad
Faculty of Engineering and Environment, Department of Mechanical and Construction Engineering, Northumbria University, Newcastle upon Tyne NE1 8ST, UK.
Polymers (Basel). 2016 Jul 1;8(7):239. doi: 10.3390/polym8070239.
Influence of topographical features on mechanical properties of 0.1 wt % Multi-Layer Graphene (MLG)/clay-epoxy nanocomposites has been studied. Three different compositions were made: (1) 0.1 wt % MLG-EP; (2) 0.1 wt % clay-EP and (3) 0.05 wt % MLG-0.05 wt % clay-EP. The objective of making hybrid nanocomposites was to determine whether synergistic effects are prominent at low weight fraction of 0.1 wt % causing an improvement in mechanical properties. The topographical features studied include waviness (), roughness average (), root mean square value () and maximum roughness height ( or ). The of as-cast 0.1 wt % MLG-EP, clay-EP and 0.05 wt % MLG-0.05 wt % clay-EP nanocomposites were 43.52, 48.43 and 41.8 µm respectively. A decrease in values was observed by treating the samples with velvet cloth and abrasive paper 1200P while increased by treating with abrasive papers 320P and 60P. A weight loss of up to 16% was observed in samples after the treatment with the abrasive papers. It was observed that MLG is more effective in improving the mechanical properties of epoxy than nanoclay. In addition, no significant improvement in mechanical properties was observed in hybrid nanocomposites indicating that 0.1 wt % is not sufficient to generate conspicuous synergistic effects.
研究了形貌特征对0.1 wt%多层石墨烯（MLG）/粘土-环氧树脂纳米复合材料力学性能的影响。制备了三种不同的组合物：（1）0.1 wt% MLG-EP；（2）0.1 wt%粘土-EP和（3）0.05 wt% MLG-0.05 wt%粘土-EP。制备杂化纳米复合材料的目的是确定在0.1 wt%的低重量分数下协同效应是否显著，从而改善力学性能。所研究的形貌特征包括波纹度（）、平均粗糙度（）、均方根值（）和最大粗糙度高度（或）。铸态0.1 wt% MLG-EP、粘土-EP和0.05 wt% MLG-0.05 wt%粘土-EP纳米复合材料的分别为43.52、48.43和41.8 µm。用天鹅绒布和1200P砂纸处理样品时，值降低，而用320P和60P砂纸处理时，值增加。用砂纸处理后，样品的重量损失高达16%。观察到MLG在改善环氧树脂力学性能方面比纳米粘土更有效。此外，在杂化纳米复合材料中未观察到力学性能的显著改善，表明0.1 wt%不足以产生明显的协同效应。
