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首页> 外文期刊>RSC Advances >Manipulating selective dispersion of reduced graphene oxide in polycarbonateylon 66 based blend nanocomposites for improved thermo-mechanical properties
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Manipulating selective dispersion of reduced graphene oxide in polycarbonateylon 66 based blend nanocomposites for improved thermo-mechanical properties

机译：操作还原性氧化石墨烯在聚碳酸酯/尼龙66基共混纳米复合材料中的选择性分散，以改善热机械性能

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This work explored the thermo-mechanical properties of a reduced graphene oxide (rGO) based polycarbonateylon 66 blend system. Synthesis of rGO is carried out via a facile solid-state reduction of GO, using selenium powder. Selective dispersion of rGO was achieved by varying the mixing-sequence of rGO in the polymer matrices under controlled shear pressure. Selective dispersion of rGO in the blend system has been investigated with FTIR, FESEM and a rheometer. FTIR analysis showed the preferential localization of rGO in the nylon phase when it melt blended first with nylon followed by PC. In addition, the mechanical and thermal properties of this blended system were also found to be higher than those of other blend nanocomposites. The rheological study showed that lower viscosity of nylon could be the reason for preferring dispersion of rGO in the nylon phase when blended first with nylon. This preferential localization of rGO in the nylon phase affects the crystallization of the nylon phase and interfacial adhesion which resulted in enhanced mechanical strength and chemical inertness of the blend nanocomposite.
机译：这项工作探索了基于还原氧化石墨烯（rGO）的聚碳酸酯/尼龙66共混体系的热机械性能。 rGO的合成是通过使用硒粉通过GO的快速固态还原进行的。通过改变rGO在受控剪切压力下在聚合物基体中的混合顺序，可以实现rGO的选择性分散。用FTIR，FESEM和流变仪研究了rGO在共混体系中的选择性分散。 FTIR分析表明，rGO首先与尼龙，然后与PC熔融共混时，rGO在尼龙相中优先定位。另外，还发现该共混体系的机械和热性能高于其他共混纳米复合材料。流变学研究表明，与尼龙共混时，较低的尼龙粘度可能是rGO优先在尼龙相中分散的原因。 rGO在尼龙相中的这种优先定位会影响尼龙相的结晶和界面附着力，从而导致共混纳米复合材料的机械强度和化学惰性增强。

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