ABSTRACT In this study, a green and efficient method was demonstrated to produce few-layer graphene (FLG) with high quality and yield via liquid-phase exfoliation (LPE) of graphite in sodium dodecyl benzenesulfonate aqueous solution by sonication. The final concentration of the as-prepared graphene was 0.96 mg mL−1 with a lateral size of about 2 μm after 2 h of sonication exfoliation. In addition, the polyamide 6/the exfoliated graphene (PA6/EG) nanocomposites were successfully fabricated by melt-blending injection. The effects of loading of EG on the mechanical properties of PA6 composites were systematically investigated. A noticeable enhancement was achieved on the PA6/EG nanocomposites. Compared with pure PA6, when the loading of EG is only 0.3 wt-%, the significant tensile strength and Young's modulus were increased by 26.7 and 21.1%, respectively, of PA6/EG composites. This green and easy process provides a choice for the application of high-performance graphene-based polymer composites.

中文翻译：

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剥离石墨烯增强聚酰胺6纳米复合材料的制备

摘要 在这项研究中，通过超声处理在十二烷基苯磺酸钠水溶液中液相剥离（LPE）石墨，证明了一种绿色有效的方法可以生产高质量和高产率的少层石墨烯（FLG）。所制备的石墨烯的最终浓度为 0.96 mg mL-1，在超声剥离 2 小时后横向尺寸约为 2 μm。此外，聚酰胺6/剥离石墨烯（PA6/EG）纳米复合材料通过熔融共混注射成功制备。系统研究了EG负载量对PA6复合材料力学性能的影响。PA6/EG 纳米复合材料取得了显着的增强。与纯 PA6 相比，当 EG 的负载量仅为 0.3 wt-% 时，拉伸强度和杨氏模量显着提高了 26.7 和 21.1%，分别是 PA6/EG 复合材料。这种绿色且简单的工艺为高性能石墨烯基聚合物复合材料的应用提供了一种选择。