Semi‐biodegradable polypropylene/poly(lactic acid) (PLA) (70:30 wt.%) blend with co‐continuous structure was used for the development of conducting composites. Multi‐walled carbon nanotube (CNT) and the noncovalently functionalized CNT with alkylphosphonium‐based ionic liquid (IL‐CNT) were used as conducting fillers. Relative high AC electrical conductivity was achieved by using 1 wt.% of CNT (around 10⁻³ S/m). This property increased four orders of magnitude when IL‐CNT was employed. The effect of the functionalization with IL on the rheological, morphological and thermal properties was investigated. The DSC analysis also suggested that the filler (CNT or IL‐CNT) exerted strong influence on the cold crystallization of the PLA phase and also on the melt crystallization of the PP phase. The effect of the IL on the dispersion of CNT was also confirmed by rheological measurements and transmission electron microscopy. An increase of the attenuation of the electromagnetic radiation, that is, an improvement of the electromagnetic interference shielding effectiveness (EMI SE) in the X‐band microwave region (8‐12 GHz) was achieved by using IL‐CNT, with an important influence of the absorption mechanism to this property.

中文翻译：

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离子液体对碳纳米管非共价官能化的影响对半生物降解聚丙烯/聚乳酸复合材料的电导率和电磁干扰屏蔽效果的影响

具有共连续结构的半生物可降解聚丙烯/聚乳酸（PLA）（70:30 wt。％）共混物用于开发导电复合材料。多壁碳纳米管（CNT）和具有烷基phosph基离子液体的非共价官能化CNT（IL-CNT）被用作导电填料。通过使用1 wt。％的CNT（大约10 ^-3S / m）。当使用IL-CNT时，此特性增加了四个数量级。研究了用IL官能化对流变学，形态学和热学性质的影响。DSC分析还表明，填料（CNT或IL-CNT）对PLA相的冷结晶以及PP相的熔融结晶有很大的影响。流变学测量和透射电子显微镜也证实了IL对CNT分散的影响。使用IL-CNT可以增加电磁辐射的衰减，即提高X波段微波区域（8-12 GHz）中的电磁干扰屏蔽效果（EMI SE），这具有重要的影响吸收机理对该特性的影响。