An effective non-covalent grafting approach to functionalize individually dispersed reduced graphene oxide sheets with high grafting density, solubility and electrical conductivity
An effective non-covalent grafting approach to functionalize individually dispersed reduced graphene oxide sheets with high grafting density, solubility and electrical conductivity
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一种有效的非共价接枝方法，可将单独分散的还原氧化石墨烯片功能化，具有高接枝密度、溶解度和电导率
DOI：
10.1039/c4nr06710j
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发表时间：
2015
期刊：
影响因子：
6.7
通讯作者：
Yiu-Wing Mai
中科院分区：
文献类型：
--
作者：
Hao Wang;Shu-Guang Bi;Yun-Sheng Ye;Yang Xue;Xiao-Lin Xie;Yiu-Wing Mai
聚合物功能化还原氧化石墨烯（聚合物-FG）以单独分散的石墨烯片形式生产，为生产可用于广泛潜在应用的纳米材料提供了新的可能性。尽管非共价官能化制备的石墨烯具有良好的分散性和相对完整的共轭网络，但利用简单、通用的方法对还原氧化石墨烯（RGO）进行有效官能化的报道却很少。在此，我们报告了一种在苯甲醇（BnOH）中从非共价功能化芘末端聚合物制备聚合物-FG的简便有效的方法。该芳香醇（BnOH）用作分散氧化石墨烯（GO）与芘末端聚合物的液体介质，并作为有效的还原剂；这使得合成过程变得方便，并且聚合物-FG的生产易于规模化，因为GO向RGO的转化和非共价官能化同时进行。所得聚合物-FG片材表现出有机分散性、高导电性和良好的加工性能，并且具有与共价材料相当的接枝密度，从而使其成为电化学器件、纳米材料和聚合物纳米复合材料等应用的有希望的候选者。因此，这项工作提供了一种制备具有所需性能的单独分散的石墨烯片的通用方法。
Polymer-functionalized reduced graphene oxide (polymer-FG), produced as individually dispersed graphene sheets, offers new possibilities for the production of nanomaterials that are useful for a broad range of potential applications. Although non-covalent functionalization has produced graphene with good dispersibility and a relatively complete conjugated network, there are few reports related to the effective functionalization of reduced graphene oxide (RGO) using a simple, general method. Herein, we report a facile and effective approach for the preparation of polymer-FG from a non-covalently functionalized pyrene-terminal polymer in benzoyl alcohol (BnOH). This aromatic alcohol (BnOH) was used as the liquid medium for the dispersion of graphene oxide (GO) with a pyrene-terminal polymer, and as an effective reductant; this makes the synthesis procedure convenient and the production of polymer-FG easily scalable because the conversion of GO to RGO and the non-covalent functionalization proceed simultaneously. The resulting polymer-FG sheets show organo-dispersibility, high electrical conductivity and good processability, and have a similar grafting density comparable to covalently made materials, thus making them promising candidates for applications such as electrochemical devices, nanomaterials and polymer nanocomposites. Hence, this work provides a general methodology for preparing individually dispersed graphene sheets with desirable properties.