氟烯烃在氧化石墨烯表面的区域选择性接枝聚合反应研究

Graphene is an ideal two-dimensional material with exceptional electrical, thermal and mechanical properties which make it promising candidate in various fields such as microelectronics, photonic devices, composite materials and bio-techniques. It can improve the strength and flexibility of the polymer. Fluorinated polymers exhibit many unique and high-performance features, such as chemical interness (to acids, bases and solvents), low refractive indices, low dielectric constants, low dissipation factors, low surface energy, high thermal stability, long durability, hydrophobic and oleophobic properties. They have been widely explored and used in many high-technology applications, including aeronautics, microelectronics, and nuclear industry. But there are some problems in preparation of fluorinated polymer/graphene composite. In this project, we will conduct the regional selective graft polymerization of fluoro olefins on the pre-modified graphene oxide, and prepare the fluorinated polymer/graphene oxide composites. After that, we will study the relationship between composite properties and the grafting sites of the polymer chain modified graphene oxide, which would be very useful for preparation of high-performance fluorinated polymer/graphene oxide composites. Therefore, this research makes great importance to the graft polymerization of fluoro olefins on graphene oxide, preparation of fluorinated polymer/graphene oxide composites, and understanding the interaction between polymer matrix and graphene oxide.

氧化石墨烯常被用作复合材料中的增强相和功能相，同聚合物等基体或分子结合可以显著提升其强度和韧性。含氟聚合物具有诸多独特而优异的性能，成为众多高科技领域不可或缺的高性能材料，而有关含氟聚合物/氧化石墨烯复合材料的制备还存在一些固有的且亟待解决的问题。本项目通过化学反应选择性地在氧化石墨烯的基面或边缘修饰可用于接枝聚合反应的官能团，从而最终实现氟烯烃的区域选择性接枝聚合，并制备得到相应的含氟聚合物/氧化石墨烯复合材料。研究不同接枝位点对含氟聚合物/氧化石墨烯复合材料综合性能的影响，从而理解氧化石墨烯在复合体系中的作用机理，为进一步制备优化的含氟聚合物/氧化石墨烯乃至更广泛的聚合物/氧化石墨烯复合材料提供理论指导。因此，本项目不论在氟烯烃同氧化石墨烯的接枝聚合反应，还是高性能含氟聚合物复合材料的制备，以及聚合物/氧化石墨烯复合体系的作用机理研究方面，都有重要的理论和实际意义。

氧化石墨烯常被用作复合材料中的增强相和功能相，同聚合物等基体或分子结合可以显著提升其强度和韧性。含氟聚合物具有诸多独特而优异的性能，成为众多高科技领域不可或缺的高性能材料，而有关含氟聚合物/氧化石墨烯复合材料的制备还存在一些固有的且亟待解决的问题。本项目通过化学反应选择性地在氧化石墨烯的基面或边缘修饰可用于接枝聚合反应的官能团，从而最终实现氟烯烃的区域选择性接枝聚合，并制备得到相应的含氟聚合物/氧化石墨烯复合材料。研究不同接枝位点对含氟聚合物/氧化石墨烯复合材料综合性能的影响，从而理解氧化石墨烯在复合体系中的作用机理，为进一步制备优化的含氟聚合物/氧化石墨烯乃至更广泛的聚合物/氧化石墨烯复合材料提供理论指导。因此，本项目不论在氟烯烃同氧化石墨烯的接枝聚合反应，还是高性能含氟聚合物复合材料的制备，以及聚合物/氧化石墨烯复合体系的作用机理研究方面，都有重要的理论和实际意义。我们首次通过钴催化聚合方法实现了氟烯烃类单体的可控自由基聚合，制备得到了一种组分和分子量可控的三氟氯乙烯/醋酸乙烯酯共聚物，为含氟聚合物的制备提供了一种新方法；我们还通过可逆加成断裂连转移聚合方法合成了三氟氯乙烯/乙烯基丁醚交替共聚物，并在此基础上制备得到一种新型含氟聚氨酯，是一种潜在的涂层材料。