基于ARGET-ATRP方法制备石墨烯平面聚合物刷

石墨烯作为一种具有优异物理化学性能的二维纳米材料，在电子、材料、催化、生物医药等领域具有广阔的应用前景。但由于石墨烯片层极容易团聚，影响其独特性能的发挥，故需要对其进行表面改性。目前，ATRP作为一种制备聚合物刷共价修饰石墨烯的方法被广泛采用。但传统ATRP存在反应操作繁琐以及催化剂污染等问题，因而选用一类新的引发体系应用于石墨烯改性具有非常重要的意义。此外，在聚合物刷共价修饰石墨烯的研究中，如何直接精确地对聚合物刷结构进行表征是有待解决的另一关键问题。针对如上问题，本项目拟将ARGET-ATRP共价修饰与聚多巴胺非共价修饰相结合，原位聚合制备石墨烯平面聚合物刷材料，并对表面聚合物刷的结构进行表征。通过本项目的研究，为可控聚合物刷共价修饰石墨烯提供一种简便、高效且环境友好的活性/可控自由基聚合方法，并为研究表面聚合物刷结构与改性石墨烯性能的关系提供实验结果及理论支持。

Graphene has emerged to be a promising material due to its unique two-dimensional structure, excellent chemical and physical properties. It has a wide application in the field of electronics, materials, catalysis and biomedicine. However, single graphene platelets tend to undergo agglomeration easily due to strong interactions, which significantly compromises the final material properties. The improvement of the dispersity is a major obstacle to be resolved in both academia and industry. Additionally, how to adjust the structures and properties of the materials in a controlled manner is also an urgent problem confronting researchers. In order to address these problems, activators regenerated by electron transfer atom transfer radical polymerization (ARGET-ATRP) covalent modification combined with polydopamine noncovalent modification was used to obtain the controlled polymer brush modified graphene. Polymer brushes would be grafted on graphene by coating the sheets with polydopamine as a reactive under-layer and sequential surface-initiated ARGET-ATRP polymerization of monomers. With the target of preparation of well-controlled polymer brush covalent modification graphene and in-situ fabrication of the graphene nanocomposites in a highly effectively manner, reaction conditions would be detailed discussed. Additionally, the relationship between structure and property of the materials would also be explored. The target of this project is to provide a more conveniently, efficiently and environmental friendly method to conduct modification of graphene with polymer brush in a well-controlled way. Moreover, this subject would provide theoretical and experimental support in research of the relationship between structure and property of the modified graphene.