摘要
氧化石墨烯液晶(GOLCs)是氧化石墨烯薄片分散在水或极性有机溶剂中形成的宏观介晶有序、微观各向异性的液晶相,在自组装膜、储能、液晶显示器和超强纤维等领域展现良好的应用前景。本文首先介绍了氧化石墨烯液晶具有向列相、层状相和手性相等结构特征;具体综述了氧化石墨烯液晶相变的影响因素、调控途径及其原理,包括氧化石墨烯的尺寸及其分布、氧化石墨烯的氧化程度、氧化石墨烯在溶液中的质量/体积分数、溶剂的极性、溶液的pH以及添加盐的种类、浓度,外界施加的电场或磁场;最后简单介绍了氧化石墨烯液晶在电化学及其他方面的潜在应用。本文为调控氧化石墨烯液晶的相结构、开发多功能氧化石墨烯液晶及拓宽氧化石墨烯液晶的应用领域提供了理论指导。
Graphene oxide liquid crystals (GOLCs) are macroscopic ordered mesocrystalline and miscroscopic anisotropic liquid crystals phase, which can be formed by graphene oxide sheets dispersed in water or polar organic solvents, and hold promise in self-assembled film, energy storage, liquid crystals display and super fibers. Firstly, the phase structure characteristics of graphene oxide liquid crystals with nematic phase, lamellar phase and chirality phase are introduced. The influencing factors, regulation ways and principles of the graphene oxide liquid crystals phase change are reviewed in detail, including the size and size distribution of graphene oxide, oxidation degree of graphene oxide, mass/volume fraction, salt concentration, pH of solution, solvent polarity and externally applied electric or magnetic fields. Finally, the potential applications of graphene oxide liquid crystals in electrochemistry and other applications are introduced. This review may provide theoretical guidance for controlling the phase structure of graphene oxide liquid crystals, developing multifunctional graphene oxide liquid crystals and widening the applications of graphene oxide liquid crystals.
作者
杨绍斌
籍遥函
沈丁
YANG Shaobin;JI Yaohan;SHEN Ding(College of Material Science and Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2019年第3期1443-1451,共9页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(51874167
51274119
51774175)
中国博士后科学基金(2018M641707)
关键词
液晶
氧化石墨烯
相变
调控途径
电化学
liquid crystals
graphene oxide
phase change
regulation ways and principles
electrochemistry