Facile fabrication of highly conductive polystyrene/nanocarbon composites with robust interconnected network via electrostatic attraction strategy†,Journal of Materials Chemistry C

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Facile fabrication of highly conductive polystyrene/nanocarbon composites with robust interconnected network via electrostatic attraction strategy†
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7tc04752e
Junshuo Cui _{1,

2,

3,

4,

5} , Shuxue Zhou _{1,

2,

3,

4,

5}

Affiliation

An electrostatic attraction strategy was employed for the preparation of highly conductive composites using commercialized graphene or multi-walled carbon nanotubes (MWCNTs) as conductive fillers and polystyrene (PS) microspheres as the resin matrix. The PS microspheres were first sulfonated to endow them with a highly negatively charged surface while the nanocarbons were positively charged in water using an amino-functionalized perylene bisimide as a stabilizer. Direct mixing of the sulfonated PS microsphere and the aqueous nanocarbon dispersion produced agglomerates with PS–nanocarbon core–shell structure due to electrostatic attraction interaction. An interconnected conductive network was formed after hot-pressing the agglomerates. Because of the strong electrostatic attraction and the high T_g temperature of the sulfonated layer, the interconnected conductive network was well-preserved even at a low filler content or a high hot-pressing temperature, resulting in an ultralow percolation threshold of the composites (<0.047 vol%) and conductivity up to 104 S m⁻¹ at a graphene content of 4.51 vol%, and to 391 S m⁻¹ at a MWCNTs content of 3.20 vol%. The above approach is time-saving and applicable to the manufacture of other conductive polymer-based composites.

中文翻译：

通过静电吸引策略，可轻松制造具有牢固互连网络的高导电性聚苯乙烯/纳米碳复合材料†

静电吸引策略用于制备高导电复合材料，该复合材料使用商品化的石墨烯或多壁碳纳米管（MWCNT）作为导电填料，而聚苯乙烯（PS）微球作为树脂基质。首先将PS微球进行磺化处理，使其具有高度带负电的表面，同时使用氨基官能化的bi双酰亚胺作为稳定剂，使纳米碳在水中带正电。磺化的PS微球与纳米碳水分散体的直接混合，由于静电吸引作用而产生具有PS-纳米碳核-壳结构的团聚体。在热压团聚物之后形成互连的导电网络。由于强的静电吸引力和高的T _g在磺化层的温度下，即使在低填料含量或高热压温度下，互连的导电网络也能很好地保留，从而导致复合材料的超低渗滤阈值（<0.047 vol％）和高达104 S m的电导率^-1以4.51体积％的石墨烯含量，以及391 S M ^-1以3.20体积％的多壁碳纳米管一个内容。上述方法节省了时间并且适用于制造其他基于导电聚合物的复合材料。

更新日期：2018-01-02

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