College of Chemistry, Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing Normal University, Beijing 100875, People's Republic of China.
ACS Nano. 2012 Sep 25;6(9):8194-202. doi: 10.1021/nn302874v. Epub 2012 Aug 28.
Functionalized graphene has been considered as one of the most important materials for preparing polymer nanocomposites due to its unique physical structure and properties. To increase the interfacial interaction between polymer component and graphene oxide (GO) sheets, in situ grafting polymerization initiated by a free radical initiator immobilized on GO sheets is a better choice. We report a facile and effective strategy for preparing graphene peroxide (GPO) via the radiation-induced peroxidation of GO. The formation of peroxides on GO is proven by iodometric measurement and other characterizations. Using GPO as a polyfunctional initiating and cross-linking center, we obtained GO composite hydrogels exhibiting excellent mechanical properties, namely, very high tensile strength (0.2-1.2 MPa), extremely high elongations (2000-5300%), and excellent resilience. This work provides new insight into the fabrication of GO/polymer nanocomposites to fulfill the excellent mechanical properties of graphene.
功能化石墨烯由于其独特的物理结构和性能，被认为是制备聚合物纳米复合材料最重要的材料之一。为了增加聚合物组分与氧化石墨烯（GO）片之间的界面相互作用，通过自由基引发剂在 GO 片上的原位接枝聚合是更好的选择。我们报道了一种通过 GO 的辐射诱导过氧化物化制备过氧石墨烯（GPO）的简便有效的策略。通过碘量法测量和其他特性证明了 GO 上过氧化物的形成。使用 GPO 作为多功能引发和交联中心，我们获得了具有优异机械性能的 GO 复合水凝胶，其拉伸强度（0.2-1.2 MPa）非常高，伸长率（2000-5300%）极高，回弹性极好。这项工作为制备 GO/聚合物纳米复合材料提供了新的见解，以满足石墨烯优异的机械性能。
