Carbon nanotubes (CNTs) are used as nanofillers in polymer nanocomposites to improve the properties of a matrix polymer because of their excellent properties. However, CNTs tend to aggregate due to the strong van der Waals force between CNTs. To solve the problem, surface-modified CNTs with hydrophilic polymers, such as polyvinyl pyrrolidone (PVP) and polystyrene sulfonate (PSS), were employed. Polystyrene (PS)/CNT nanocomposites were fabricated by latex technology, which is a suitable method for dispersing nanofillers in aqueous particle suspension. The effect of the incorporation of the modified CNT was significant, thereby resulting in increased modulus at lower frequencies when compared to that of neat PS. Electrical percolation thresholds of PS/PSS-wrapped CNT and PS/PVP-wrapped CNT nanocomposites corresponded to 0.39 and 0.52 wt.%, respectively. The PS/PSS-CNT nanocomposites exhibited higher rheological and electrical properties than the PS/PVP-CNT counterparts due to the hydrophilic nature of PSS with strong negative charge groups.

中文翻译：

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通过掺入聚合物包裹的碳纳米管，聚苯乙烯纳米复合材料的流变和电学性质

碳纳米管（CNT）由于在聚合物纳米复合材料中的优异性能而被用作纳米填料，以改善基质聚合物的性能。然而，由于CNT之间的强范德华力，CNT趋于聚集。为了解决该问题，使用了具有亲水性聚合物如聚乙烯吡咯烷酮（PVP）和聚苯乙烯磺酸盐（PSS）的表面改性的CNT。聚苯乙烯（PS）/ CNT纳米复合材料是通过乳胶技术制备的，这是一种将纳米填料分散在水性颗粒悬浮液中的合适方法。与纯PS相比，掺入改性CNT的效果是显着的，从而导致在较低频率下模量增加。PS / PSS包裹的CNT和PS / PVP包裹的CNT纳米复合材料的电渗阈值分别为0.39和0.52 wt。％，分别。由于具有强负电荷基团的PSS的亲水性，PS / PSS-CNT纳米复合材料比PS / PVP-CNT纳米复合材料具有更高的流变学和电学性能。