以单宁酸为水相转移、固定化因子构建纳米共轭碳材料功能性涂层的研究

纳米共轭碳材料涂层因其优秀的电化学性质与良好的导热性能，在储能、生物传感以及柔性器件等新材料领域引起广泛关注。然而，在涂层制备过程中仍存在亲水性改性对共轭结构的破坏、相互作用缺失导致涂层与基质分离等问题，严重影响材料性能与整体性。为此，本研究拟引入单宁酸作为转移、固定化因子，通过非共价键作用与纳米共轭碳材料形成水分散配体，负载纳米共轭碳材料转移、固定到目标基质，进而在保留碳材料原有性状基础上组装形成碳材料涂层。本研究将：(1)构建可转移、固定化的多类型单宁酸/纳米共轭碳材料水性分散配体并探究其形成机理；(2)探求不同配体在基质表面转移、固定化行为机理，揭示单宁酸作为纳米共轭碳材料转移、固定化因子的作用机制；(3)明确固定化后碳材料涂层的性能与转移、固定化行为中各个因素间的关系等以上三个方面开展研究，以期建立构建高性能碳材料涂层的新方法，实现单宁酸的高值化应用。

Aromatic conjugated nano-carbon (ACN) layers are widely accepted as promising material in the development of novel materials for energy storage, bio-sensing and flexible devices due to their excellent electrochemical properties and good thermal conductivity. However, the fabrication process of ACN layer still meets problem with low performance and structural instability. This is due to several reasons including destruction of conjugated structure induced by hydrophilic modification, lack of interaction between layer and substrate which results in phase separation, etc. Here we intend to establish a feasible and universal concept for the fabrication of aromatic conjugated nano-carbon (ACN) layers through the assistance of tannic acid (TA) in aqueous condition. The existence of non-covalent interaction between TA and ACN enables TA as agent in the immobilization and fixation of ACN onto targeted substrates thus forming carbon-based surface coating. Since chemical modification of carbon materials is not required in this system, the advantages of ACN are preserved. Through the strong bridging effect of TA between ACN and substrate, the integrity as well as stability of the synthesized material can be assured. This project will be carried out mainly from following three aspects: (1) The formation mechanism of dispersible TA/ACN complex will be studied using different types of TA and ACN; (2) To reveal the role of TA, the immobilization and fixation mechanism of various types of TA/ACN complexes on different substrates will be studied; (3) Correlations between the properties and effecting factors to the immobilization and fixation of TA/ACN layers will be established to make it a novel and feasible concept for the fabrication of carbon-based layers with high performance. This will enable a bright future of both material design and highly value-added utilization of tannic acid.