Control of nanoparticle distribution in polymer matrices is a key factor for designing highly conductive nanocomposites. Here, polypropylene (PP)/aluminum oxide (Al₂O₃) nanocomposites with a continuous segregated structure were designed. Al₂O₃ nanoparticles were initially distributed in the polyolefin elastomer (POE) phase of PP/POE/Al₂O₃ with a co-continuous structure. Selective extraction of the POE phase provided a porous PP scaffold, whose pore walls were covered by deposited Al₂O₃ nanoparticles. Subsequent compression molding made the porous scaffold tightly compacted to form uniform and dense thermal conductive networks. The thermal conductivity was compared among nanocomposites having three different types of Al₂O₃ distribution. It was found that the continuous segregated distribution was far the most effective for improving the thermal conductivity, where 1.07 W/m K was achieved at an Al₂O₃ loading of 27.5 vol%.

控制聚合物基质中纳米颗粒的分布是设计高导电性纳米复合材料的关键因素。在此，设计了具有连续分离结构的聚丙烯（PP）/氧化铝（Al ₂ O ₃）纳米复合材料。Al ₂ O ₃纳米颗粒最初分布在具有共连续结构的PP / POE / Al ₂ O ₃的聚烯烃弹性体（POE）相中。POE相的选择性萃取提供了多孔的PP支架，其孔壁被沉积的Al ₂ O ₃覆盖纳米粒子。随后的压缩成型使多孔支架紧密压实以形成均匀且致密的导热网络。比较了具有三种不同类型的Al ₂ O ₃分布的纳米复合材料的热导率。已经发现，连续的偏析分布对于提高热导率是最有效的，在27.5vol ％的Al ₂ O ₃负载下达到1.07W / m K。