Preparation of graphene/polymer composite film and its response to organic pollutants
Li, Yang (2018)
Li, Yang
Tampereen ammattikorkeakoulu
2018
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2018080814449
https://urn.fi/URN:NBN:fi:amk-2018080814449
Tiivistelmä
Graphene is a novel two-dimensional planar material composed of sp2-hybridized carbon atoms. It has a large specific surface area, excellent electron mobility, good flexibility and light transmittance and strong mechanical properties. Nowadays, graphene and its composite materials have been widely used in many fields such as energy industry, environment science, nano-biomedicine, and also can be used as novel sensors. Especially in the field of chemical detection, graphene meets the design requirements of ultra-sensitive sensors with these excellent properties, and graphene composites have become popular in the field of composite materials. The oxidized graphene not only has the two-dimensional planar structure and characteristics of the graphene but also retains part of the graphene structure. After the oxidation, the graphene layers are functionalized with oxygen-containing functional groups such as hydroxyl groups, carbonyl groups, and carboxyl groups. The construction of composite materials and their simple, responsive, sensitive and selective optical sensors are of great significance to the field of chemical detection.
In this thesis, the graphene oxide was prepared by the Hummers method, graphene oxide was characterized, and a sensor capable of responding to a series of gases was prepared by combining graphene oxide with a macromolecule. The significance of this study is to open up new possibilities for further improving the sensing performance of graphene/polymer composites. In addition, it provides a new approach for the development of novel room temperature sensors. 石墨烯是由sp2杂化的碳原子组成的新型二维平面材料,具有巨大的比表面积,优异的电子迁移能力,良好的柔韧性和透光率,强大的力学性质等优点。目前石墨稀及其复合材料已经被广泛的应用于能源、环境、纳米生物医学以及传感器等诸多领域。尤其是在化学检测领域,石墨烯以其优异的性能满足了高灵敏性传感器的设计需求,石墨烯复合材料已然成为复合材料领域的新星。经过氧化的石墨烯,不但具有石墨烯的二维平面结构和特性,保留了石墨烯的部分结构,氧化后石墨烯层间还会被插入很多羟基、羰基、羧基等含氧官能团,基于石墨稀及其复合材料构建操作简便、响应迅速、灵敏度高以及选择性好的光学传感器,对环境保护领域具有极大的意义。
本文针对以上背景,通过Hummers方法制备氧化石墨烯,对氧化石墨烯进行表征,并用氧化石墨烯与高分子结合制备可以响应一系列气体的传感器,并对传感器进行气敏测试。本研究的意义在于为进一步提高石墨烯/高分子复合材料的传感性能打开新的可能性,此外,它还为开发新型室温传感器提供了一种新途径。
In this thesis, the graphene oxide was prepared by the Hummers method, graphene oxide was characterized, and a sensor capable of responding to a series of gases was prepared by combining graphene oxide with a macromolecule. The significance of this study is to open up new possibilities for further improving the sensing performance of graphene/polymer composites. In addition, it provides a new approach for the development of novel room temperature sensors.
本文针对以上背景,通过Hummers方法制备氧化石墨烯,对氧化石墨烯进行表征,并用氧化石墨烯与高分子结合制备可以响应一系列气体的传感器,并对传感器进行气敏测试。本研究的意义在于为进一步提高石墨烯/高分子复合材料的传感性能打开新的可能性,此外,它还为开发新型室温传感器提供了一种新途径。