石墨烯薄膜的制备工艺及其应用

发布时间：2018-03-08 13:31

  本文选题：石墨烯　切入点：氧化石墨烯　出处：《南京邮电大学》2017年硕士论文　论文类型：学位论文

【摘要】：石墨烯是一种sp2杂化的二维蜂窝状新型材料,在2004年由曼彻斯特大学的安德烈·海姆和康斯坦丁·诺沃肖洛夫采用机械剥离法成功制备。石墨烯只有一个碳原子的厚度,具有十分优良的透光率,机械强度,导热性和导电性。氧化石墨烯是石墨烯的氧化物及前驱体,通过对其性质的研究,我们在原有的氧化石墨烯薄膜及其复合薄膜制备方法的基础上设计了全新的制备方法,并研究其各项性能,提出新的应用研究。为此,在本文中,首先,我们利用传统的涂布及抽滤方法制备PVA与氧化石墨烯和磺酸化石墨烯复合薄膜,控制氧化石墨烯与磺酸化氧化石墨烯的比例,制备出不同的复合薄膜,并研究其力学性能,进一步的通过对薄膜进行还原,从而使得薄膜具备优越的导电性,并具有优秀的力学性能。随后,我们针对一些小分子化合物设计了新的薄膜制备方法,浸涂成胶法,此方法来源于湿法纺丝的制备工艺。首先将玻璃基底浸润到氧化石墨烯水分散液中,随后将基底再浸润到小分子化合物凝固液中,待凝固完毕烘干即成薄膜。此方法可以将小分子化合物结合到氧化石墨烯薄膜的片层之间,从而能够控制其层间距,形成良好的电容结构,并且在水处理方面能够有良好的应用。最后,对之前制备的氧化石墨烯复合薄膜进行应用研究,首先制备的薄膜经过还原具有良好的导电性,其次在导热性能方面也有突出的效果。传统的石墨烯导热膜都是由PI薄膜经过1500℃的碳化及3000℃的石墨化过程制备的,这样的方法成本高,能耗大。而我们提出的方法降低了成本及能耗,通过进行对比几种高导热石墨膜的导热系数,制备出了低成本高性能的导热膜。
[Abstract]:Graphene, a new two-dimensional honeycomb material hybrid by sp2, was successfully prepared in 2004 by Andre Heym and Constantine Novosholov at the University of Manchester by mechanical stripping. Graphene is only the thickness of a carbon atom. Graphene oxide is the oxide and precursor of graphene. We have designed a new preparation method on the basis of the original graphene oxide thin film and its composite thin film, studied its properties and put forward new application research. PVA / graphene oxide and graphene sulfonate composite films were prepared by traditional coating and filtration methods. Different composite films were prepared by controlling the ratio of graphene oxide to graphene sulfonic oxide, and their mechanical properties were studied. The film was further reduced to make the film have excellent electrical conductivity and excellent mechanical properties. Subsequently, we designed a new method for the preparation of thin films for some small molecular compounds. This method is derived from the wet spinning process. The glass substrate is first infiltrated into the graphene oxide aqueous dispersion, and then the substrate is re-infiltrated into the solidification solution of small molecular compounds. This method can combine small molecular compounds between the layers of graphene oxide film, so that the spacing between layers can be controlled, and a good capacitance structure can be formed. And can be used in water treatment. Finally, the graphene oxide composite thin films prepared before the application study, the first thin film after reduction has a good conductivity, The traditional graphene films were prepared from Pi films by carbonization at 1500 鈩，

本文编号：1584100