This study explores the impact of carbon nanotubes (CNTs) dispersion on the microcellular foaming characteristics of poly(butylene succinate) (PBS) matrices. Two distinct dispersion methods, primary (PD) and secondary (SD), were employed to fabricate PBS/CNT nanocomposites, resulting in different filler dispersion states. The PD technique involves the conventional method of direct melt blending PBS with CNTs, while the SD technique adopts a more advanced strategy by integrating the Pickering emulsion template with melt blending, achieving finer CNTs distribution within the PBS matrix. The results reveal that the SD technique leads to significantly more uniform distribution of CNTs, which in turn enhances the melt strength and crystallization of the polymer matrix, thereby broadening the window for microcellular foaming. Notably, foams developed through the SD method exhibited a decrease in cell size to 10.4 μm and an increase in cell density to 1.8×10 cells·cm. Moreover, this uniform distribution of CNTs contributed to superior cell stability and an increase in compressive strength to 14.0 MPa. These findings highlight the pivotal role of nanofiller dispersion in determining foam properties and establish foundational knowledge for designing PBS foams with consistent and uniform cell structures. Such advancements are crucial for enhancing the applicability and performance of PBS-based materials across a spectrum of industries.

中文翻译：

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深入研究碳纳米填料分散体如何影响聚丁二酸丁二醇酯纳米复合材料中的微孔发泡行为

本研究探讨了碳纳米管 (CNT) 分散体对聚丁二酸丁二醇酯 (PBS) 基质微孔发泡特性的影响。采用初级 (PD) 和次级 (SD) 两种不同的分散方法来制造 PBS/CNT 纳米复合材料，从而产生不同的填料分散状态。 PD技术涉及将PBS与CNT直接熔融共混的传统方法，而SD技术则采用更先进的策略，将Pickering乳液模板与熔融共混相结合，在PBS基质中实现更精细的CNT分布。结果表明，SD 技术使碳纳米管的分布更加均匀，从而提高了聚合物基体的熔体强度和结晶度，从而拓宽了微孔发泡的窗口。值得注意的是，通过SD方法开发的泡沫的泡孔尺寸减小至10.4μm，泡孔密度增加至1.8×10个泡孔·cm。此外，碳纳米管的这种均匀分布有助于实现优异的电池稳定性并将抗压强度提高至 14.0 MPa。这些发现强调了纳米填料分散体在确定泡沫性能方面的关键作用，并为设计具有一致和均匀泡孔结构的 PBS 泡沫奠定了基础知识。这些进步对于提高基于 PBS 的材料在各行业的适用性和性能至关重要。