Abstract This article reports unique microstructural development and enhanced mechanical and thermal properties of a biodegradable polylactide (PLA)/poly(e-caprolactone) (PCL) blend through selective localization of functionalized thermally exfoliated reduced graphene oxide (f-TERGO) particles in the dispersed PCL phase. We used batch melt-blending to produce the PLA/PCL/f-TERGO composites with matrix of PLA and PCL. With the addition of 0.05 and 0.1 wt% f-TERGO to the polymers, there was no significant change in the blend morphology; however, at 0.25 wt% f-TERGO loading the size of the dispersed phase increased. The impact strength increased from 6 kJ/m2 for neat PLA to 10 kJ/m2 for the 0.1 wt% f-TERGO composite, whereas the elongation-at-break increased from 5% for neat PLA to 90% for the 0.05 wt% f-TERGO-filled composite. The thermal conductivity of the composites moderately increased with f-TERGO addition, which was associated with an increased number of nucleation sites in the f-TERGO-containing composites, homogenous spherulite growth, and increased crystallization temperature of the PCL phase. Unlike TERGO, f-TERGO addition did not increase electrical resistivity, clearly due to the surface functionalization. This study demonstrates the possibility of enhancing the toughness, melt-viscosity, and thermal conductivity of PLA by blending it with PCL and f-TERGO.

中文翻译：

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功能化剥离还原氧化石墨烯纳米颗粒定位对纳米生物复合材料机械、热和电子性能的影响

摘要 本文报告了可生物降解聚丙交酯 (PLA)/聚(e-己内酯) (PCL) 混合物的独特微观结构发展和增强的机械和热性能，通过选择性定位分散的功能化热剥离还原氧化石墨烯 (f-TERGO) 颗粒。 PCL 阶段。我们使用批量熔融共混生产具有 PLA 和 PCL 基体的 PLA/PCL/f-TERGO 复合材料。在聚合物中添加 0.05 和 0.1 wt% f-TERGO 后，共混物形态没有显着变化；然而，在 0.25 wt% f-TERGO 负载下，分散相的尺寸增加。冲击强度从纯 PLA 的 6 kJ/m2 增加到 0.1 wt% f-TERGO 复合材料的 10 kJ/m2，而断裂伸长率从纯 PLA 的 5% 增加到 0.05 wt% f 的 90% -TERGO 填充复合材料。复合材料的热导率随着 f-TERGO 的添加适度增加，这与含 f-TERGO 的复合材料中成核位点数量的增加、均匀的球晶生长和 PCL 相的结晶温度增加有关。与 TERGO 不同，添加 f-TERGO 不会增加电阻率，这显然是由于表面功能化。该研究证明了通过将 PLA 与 PCL 和 f-TERGO 混合来提高其韧性、熔体粘度和热导率的可能性。f-TERGO 添加不会增加电阻率，这显然是由于表面功能化。该研究证明了通过将 PLA 与 PCL 和 f-TERGO 混合来提高其韧性、熔体粘度和热导率的可能性。f-TERGO 添加不会增加电阻率，这显然是由于表面功能化。该研究证明了通过将 PLA 与 PCL 和 f-TERGO 混合来提高其韧性、熔体粘度和热导率的可能性。