In order to meet the growing demands for high specific performance in advanced composite system, carbon nanotubes (CNTs) are widely utilized to endow composite with optimized properties. However, the performance improvement is always impeded by CNTs aggregation. Herein, two typical urchin‐liked SiO₂‐CNTs hybrid (SCH) and SiO₂@SiO₂‐CNTs hybrid (SSCH) were synthesized by utilizing chemical vapor deposition. SCH and SSCH filled polyethylene (PE) nanocomposites were fabricated by solution‐blending and hot‐compression. The electrical, dielectric, rheological, and thermal behaviors of the composites were carefully studied. Both composites showed the low percolation threshold that below 0.5 wt%. By adding 1 wt% hybrid, the electrical conductivity of composites were enhanced by 12 orders of magnitude. Moreover, the self‐strengthened SSCH was preferred to form homogeneous dispersion in polymer matrix, leading to a slightly negative influence on processability. All these features provide a reasonable route for designing CNTs‐filled composites with advanced structural or highly conductive properties in future.

中文翻译：

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增强聚乙烯基复合材料的类urchin结构SiO2-碳纳米管杂化结构的功能性能演变

为了满足在高级复合材料系统中对高比性能不断增长的需求，碳纳米管（CNT）被广泛用于赋予复合材料以优化的性能。但是，性能提高始终受到CNT聚集的阻碍。在此，两个典型的类似海胆的SiO ₂ -CNTs杂化物（SCH）和SiO ₂ @SiO ₂‐CNTs杂化体（SSCH）是利用化学气相沉积法合成的。SCH和SSCH填充的聚乙烯（PE）纳米复合材料是通过溶液共混和热压制成的。仔细研究了复合材料的电，介电，流变和热行为。两种复合材料均显示出低于0.5 wt％的低渗透阈值。通过添加1 wt％的杂化物，复合材料的电导率提高了12个数量级。此外，优选使用自增强的SSCH在聚合物基体中形成均匀的分散体，从而对可加工性产生轻微的负面影响。所有这些功能为将来设计具有先进结构或高导电性能的CNTs填充复合材料提供了一条合理的途径。