Abstract Lightweight electrically conductive biodegradable polymer composites have been considered as a promising environmental-friendly alternative to replace the traditional petroleum-based CPCs because of the economic and ecological drawbacks of petroleum-based plastics. Herein, we demonstrated a facile and effective way to fabricate poly (butylene succinate) (PBS)/carbon fiber (CF) composites foams with lightweight, high-strength and improved conductive networks through the combination of solvent mixing, micro-injection molding and supercritical carbon dioxide (Sc-CO2) foaming methods. Results showed that the resulting composite foams possessed much higher electrical conductivity (the percolation threshold decreased from 3.6 to 7.4 to 1.04–2.37 vol%), suggesting that the introduction of foaming technique could be beneficial for the formation of effective 3D conductivity networks. The composite foams presented a good compressive strength and a low density (reduced around ∼50%). Moreover, effects of different length and content of CF on the mechanical and thermal performance, rheological behavior, foaming properties and electrical conductivities of PBS/CF composites have been investigated.

中文翻译：

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一种制造具有高导电性和强度的轻质可生物降解聚（丁二酸丁二醇酯）/碳纤维复合泡沫的简便方法

摘要 由于石油基塑料的经济和生态缺陷，轻质导电可生物降解聚合物复合材料被认为是替代传统石油基 CPC 的一种有前途的环保替代品。在此，我们展示了一种通过溶剂混合、微注射成型和超临界相结合来制造具有轻质、高强度和改进的导电网络的聚（丁二酸丁二醇酯）（PBS）/碳纤维（CF）复合泡沫的简便有效的方法。二氧化碳 (Sc-CO2) 发泡方法。结果表明，所得复合泡沫具有更高的电导率（渗透阈值从 3.6 到 7.4 降低到 1.04-2.37 vol%），这表明发泡技术的引入可能有利于形成有效的 3D 电导网络。复合泡沫表现出良好的抗压强度和低密度（降低约 50%）。此外，研究了不同长度和 CF 含量对 PBS/CF 复合材料的机械和热性能、流变行为、发泡性能和电导率的影响。