Abstract

In this work, an amino-terminated polyether (ATP) was synthesized and used for the functionalization of GO to obtain an amino-terminal polyether-functionalized graphene oxide (FGO). The structure of FGO was characterized by FTIR, Raman, XPS, XRD, AFM, SEM and TGA. And then the FGO was incorporated into waterborne epoxy resin (WEP) to prepare FGO/WEP composites. The SEM results revealed that such amino-terminal polyether functionalization can significantly improve the interfacial interaction between GO and the WEP matrix. The tensile test showed that the Young's modulus and tensile strength of FGO/WEP composites were much higher than that of WEP and GO/WEP composites. In particular, the 0.1 wt% FGO/WEP nanocomposite exhibited increases of 56% and 83% in tensile strength and Young's modulus as compared to WEP. In addition, the initial thermal decomposition temperature (T_d) of the 0.1 wt% FGO/WEP composite was increased by 42 °C compared with pure WEP. Furthermore, the FGO/WEP composites showed lower water absorption and higher water contact angles, indicated that the addition of FGO can significantly improve the hydrophobicity of WEP.

摘要

在这项工作中，合成了端氨基聚醚 (ATP) 并将其用于 GO 的功能化，以获得氨基端聚醚功能化的氧化石墨烯 (FGO)。FGO的结构通过FTIR、Raman、XPS、XRD、AFM、SEM和TGA表征。然后将 FGO 掺入水性环氧树脂 (WEP) 以制备 FGO/WEP 复合材料。SEM 结果表明，这种氨基末端聚醚官能化可以显着改善 GO 和 WEP 基质之间的界面相互作用。拉伸试验表明，FGO/WEP 复合材料的杨氏模量和拉伸强度远高于 WEP 和 GO/WEP 复合材料。特别是，与 WEP 相比，0.1 wt% FGO/WEP 纳米复合材料的拉伸强度和杨氏模量分别增加了 56% 和 83%。此外，_d ) 与纯 WEP 相比，0.1 wt% FGO/WEP 复合材料的温度增加了 42°C。此外，FGO/WEP 复合材料表现出较低的吸水率和较高的水接触角，表明 FGO 的加入可以显着提高 WEP 的疏水性。