石墨烯分散液制备及其环氧树脂复合材料的防腐蚀性能研究

发布时间：2018-06-10 12:43

  本文选题：石墨烯分散液 + 聚吡咯　； 参考：《上海应用技术大学》2016年硕士论文

【摘要】：石墨烯是聚合物纳米复合材料的重要的改性材料之一,因其具有优异的化学稳定性、机械性能、良好的片层阻隔性能等。在防腐蚀领域,石墨烯作为优异的防腐蚀涂层材料,对腐蚀因子具有很好的阻隔效应。目前,使用化学沉积法制备的石墨烯涂层,研究证明具有对空气,氧负离子,氯离子等腐蚀因子的阻隔效应。石墨烯片层之间具有π-π相互作用而容易发生团聚,这对石墨烯防腐蚀的应用受限。本论文通过非共价功能化方法,制备了石墨烯分散体,相比于化学改性,具有反应条件温和、反应过程可控以及高效环保等优点。本文考察了使用聚合物改性的石墨烯、活性稀释剂分散的石墨烯对环氧树脂涂层性能的影响。由于聚吡咯和石墨烯各自之间具有强的分子间相互作用,使得单独使用时容易发生团聚现象。但是当在聚吡咯聚合时加入1%-3%的石墨烯时,聚吡咯的团聚球形形貌变成扁平状的聚吡咯/石墨烯复合材料。制备的聚吡咯/石墨烯复合材料对环氧树脂涂层的防腐蚀性能提高了很多,大的比表面积能够有效的增加腐蚀因子在涂层中的运动路径。随着石墨烯含量的增加,复合材料的流变性能和介电性能越来越好。当体系为聚吡咯(97)/石墨烯(3)时,复合材料的热固化峰发生了右移,从100℃增加到110℃,导电聚吡咯复合材料的引入,三元复合材料的体积电阻率降低了很多。产生这种影响,是因为石墨烯与聚吡咯之间相互促进分散,使得复合材料的性能得到改善,进而增强了对腐蚀因子的阻隔性能。本文还制备了活性稀释剂分散的石墨烯基环氧树脂复合材料,并考察了其在防腐蚀领域的应用。通过制备不同质量分数的石墨烯分散液(环氧环戊烷和1,2环氧己烷),使用扫描电镜和透射电镜对石墨烯基环氧树脂复合材料的形貌进行了表征,表明特殊结构的活性稀释剂的使用,能够获取分散性好的石墨烯分散体。活性稀释剂的使用,不仅降低了环氧树脂的粘度,还有效的防止了石墨烯的团聚。实验结果证明,制备的石墨烯基环氧树脂复合材料具有很好的导热性能和防腐蚀性能。
[Abstract]:Graphene is one of the most important modified polymer nanocomposites because of its excellent chemical stability, mechanical properties and good lamellar barrier properties. Graphene, as an excellent anticorrosive coating material, has a good barrier effect on corrosion factor in corrosion protection field. At present, the graphene coating prepared by chemical deposition method has been proved to have the barrier effect on the corrosion factors such as air, oxygen negative ion, chloride ion and so on. There is 蟺-蟺 interaction between the graphene lamellae and it is easy to agglomerate, which is limited in the application of graphene corrosion protection. In this paper, graphene dispersion was prepared by non-covalent functionalization. Compared with chemical modification, graphene dispersion has the advantages of mild reaction conditions, controllable reaction process and high efficiency and environmental protection. The effects of polymer modified graphene and active diluent dispersed graphene on the properties of epoxy resin coating were investigated. Due to the strong intermolecular interaction between polypyrrole and graphene, agglomeration occurs easily when used alone. However, when 1-3% graphene was added to polypyrrole polymerization, the aggregation spherical morphology of polypyrrole turned into flattened polypyrrole / graphene composite. The anticorrosion performance of the prepared polypyrrole / graphene composite has been greatly improved. Large specific surface area can effectively increase the movement path of corrosion factor in the coating. With the increase of graphene content, the rheological and dielectric properties of the composites become better and better. When the system was polypyrrole 97 / graphene 3), the thermal curing peak of the composites shifted to the right, increasing from 100 鈩，

本文编号：2003265