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首页> 外文期刊>Green chemistry >Resolving the dilemma of gaining conductivity but losing environmental friendliness in producing polystyrene/graphene composites via optimizing the matrix-filler structure
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Resolving the dilemma of gaining conductivity but losing environmental friendliness in producing polystyrene/graphene composites via optimizing the matrix-filler structure

机译：通过优化基体-填料结构，解决了在生产聚苯乙烯/石墨烯复合材料时增加导电性但失去环境友好性的难题

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摘要

In this work, we report a new approach to resolve a practical problem in producing conductive poly-styrene/reduced-graphene-oxide (PS/RGO) composites, i.e. the dilemma that raising the conductivity detrimentally compromises the environmental friendliness of the process because the prevalent chemistry designs emphasize raising conductivity in RGO production by employing strong and toxic chemicals or energy-consuming heat treatments. These designs then rely on organic solvents, chemical functionali-zation, and stabilizers to overcome the difficulty in dispersing and incorporating RGO into the polymer matrix. In our new design, we emphasize that a compact percolated three-dimensional microcellular RGO network with long-range order is the most effective use of RGO for high composite conductivity. With this guide, GO and non-polar PS mono-dispersed microspheres are co-dispersed in water, with GO stably adsorbing on the microspheres. PS/GO microspheres are then reduced with a nontoxic reducing agent such as vitamin C. PS/RGO microspheres are subsequently hot-pressed into a composite with the required compact percolated three-dimensional microcellular RGO structure. Experimental data collected from the resultant composites validate the design and indeed show low percolation threshold (0.08 vol%), high conductivity (20.5 S m~(-1)), and good compliance with the principles of green chemistry.
机译：在这项工作中，我们报告了一种解决生产导电聚苯乙烯/氧化石墨烯（PS / RGO）复合材料中的实际问题的新方法，即提高电导率会不利地损害工艺的环境友好性，因为流行的化学设计强调通过采用强而有毒的化学药品或耗能的热处理来提高RGO生产中的电导率。然后，这些设计依靠有机溶剂，化学官能化和稳定剂来克服将RGO分散和掺入聚合物基质的困难。在我们的新设计中，我们强调具有远距离顺序的紧凑的渗滤三维微孔RGO网络是RGO用于高复合电导率的最有效方法。借助该指南，GO和非极性PS单分散微球共分散在水中，GO稳定地吸附在微球上。然后用无毒的还原剂（例如维生素C）还原PS / GO微球。随后将PS / RGO微球热压成具有所需的紧密渗透的三维微孔RGO结构的复合材料。从所得复合材料收集的实验数据验证了设计，并确实显示出较低的渗透阈值（0.08 vol％），高电导率（20.5 S m〜（-1））和良好的绿色化学原理。

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