An attempt towards fabricating reduced graphene oxide composites with traditional polymer processing techniques by adding chemical reduction agents
An attempt towards fabricating reduced graphene oxide composites with traditional polymer processing techniques by adding chemical reduction agents
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通过添加化学还原剂，利用传统聚合物加工技术制备还原氧化石墨烯复合材料的尝试
DOI：
10.1016/j.compscitech.2016.12.026
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发表时间：
2017-03-01
影响因子：
9.1
通讯作者：
Feng, Jiachun
中科院分区：
文献类型：
--
作者：
Liu, Yue;Feng, Jiachun
石墨烯基聚合物复合材料无论在基础研究还是实际应用中都受到了极大的关注。通过易于批量生产和环境友好的技术制备聚合物/还原氧化石墨烯(RGO)复合材料是工业化生产的当务之急。在本工作中，我们尝试添加各种化学还原剂作为“修饰剂”，研究在聚合物和氧化石墨烯混合物的传统热塑性加工过程中原位化学还原氧化石墨烯(GO)的可能性。热分析和结构表征表明，在所考察的4种还原剂中，对苯二酚(HQ)在常用的熔融共混或双辊米勒混炼过程中能有效地还原GO。在100℃下，EVA与GO(质量比为95：5)熔融共混制备的EVA复合材料的还原热值为50.6J/g，而HQ含量为5wt%的EVA复合材料的还原热值仅为1.6J/g，表明HQ的加入有效地降低了GO的还原热值。虽然HQ的还原能力相对较弱，但我们的工作证实了在聚合物材料的传统加工过程中通过化学还原GO是可能的，这有助于开发一种大规模可生产、低成本和环境友好的制备聚合物/RGO复合材料的方法。(C)2016爱思唯尔有限公司。保留所有权利。
Graphene based polymer composites have attracted considerable attention for both fundamental studies and practical applications. Fabricating polymer/reduced graphene oxide (rGO) composites via a readily mass-producible and environment-friendly technique is imperative for industry production. In this work, we tried to add various kinds of chemical reductants as "modifier" and study the possibility of in situ chemical reduction of graphene oxide (GO) during traditional thermoplastic processing of polymer and GO mixture. The thermal analysis and structural characterization revealed that among the 4 kinds reductants we investigated, hydroquinone (HQ) can effectively reduce GO during the commonly used melt blending or twin-roller miller mixing processing. For an ethylene vinyl acetate copolymer (EVA) composite prepared by melt-blending of EVA and GO (95:5 in mass) at 100 degrees C, the heat of reduction corresponds to the remove of oxygen-containing groups on GO in the composite is 50.6 J/g. In contrast, the value for the composite with 5 wt% HQ is only 1.6 J/g. The significant decreased values of reduction heat suggested the effective reduction of GO due to the addition of HQ. Although the reducing ability of HQ is weak relatively, our work confirms that it is possible to chemically reduce GO during traditional processing of polymer materials, which is helpful to develop a large-scale producible, cost-effective and environment-friendly approach for the fabrication of polymer/rGO composites. (C) 2016 Elsevier Ltd. All rights reserved.