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首页> 外文期刊>Journal of Applied Polymer Science >Scalable fabrication of high-performance graphene/polyamide 66 nanocomposites with controllable surface chemistry by melt compounding
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Scalable fabrication of high-performance graphene/polyamide 66 nanocomposites with controllable surface chemistry by melt compounding

机译：通过熔融配合使用可控表面化学的高性能石墨烯/聚酰胺66纳米复合材料的可伸缩制造

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摘要

Scalable and ease fabrication of high-performance graphene reinforced polyamide 66 (PA66) nanocomposites by melt-mixing were achieved by selecting ideal graphene reinforcement having high C/O ratio. In this study, single-layer amine functionalized reduced graphene oxide and multi-layer thermally exfoliated graphene oxide (TEGO) were used to investigate the influence of surface chemistry and dispersion state on crystallization behaviors, mechanical, and thermal properties of graphene reinforced PA66 nanocomposites. Both types of graphenes acted as nucleating agent but TEGO showed the better performance due to its intercalated structure formation mechanism and efficient viscous flow during melting. Mechanical results indicated that 0.5 wt% TEGO based PA66 nanocomposite showed the highest tensile properties by increasing tensile modulus and tensile strength up to 45% and 16.1%, respectively. In addition, TEGO reinforced nanocomposites showed more stable viscoelastic behavior by reaching a plateau at high temperatures and restraining long-range motion of polymer chains.
机译：通过选择具有高C/O比的理想石墨烯增强体，通过熔融混合实现了高性能石墨烯增强聚酰胺66（PA66）纳米复合材料的可伸缩性和易制备性。本研究采用单层胺功能化还原氧化石墨烯和多层热剥离氧化石墨烯（TEGO）研究了表面化学和分散状态对石墨烯增强PA66纳米复合材料结晶行为、力学和热性能的影响。这两种石墨烯都起到了成核剂的作用，但TEGO由于其插层结构形成机制和熔融过程中的有效粘性流动而表现出更好的性能。力学性能测试结果表明，0.5wt%TEGO基PA66纳米复合材料的拉伸模量和拉伸强度分别提高45%和16.1%，表现出最高的拉伸性能。此外，TEGO增强纳米复合材料通过在高温下达到平台并抑制聚合物链的长程运动，表现出更稳定的粘弹性行为。

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