侧基含多维度纳米结构基元基液晶聚合物的聚集态和多级自组装性能研究

The project combines the concepts of nanostructure units and mesogen-jacketed liquid crystalline polymers (MJLCPs), and proposes a kind of novel liquid crystalline polymers (LCPs) containing multiple nanostructure units in side chains. These LCPs with polynorbornene as the main chain have well-defined in structure and precisely controlled in chain length. The major points of the project are as follows: 1) Researching the relationship between the nanostructure units, spacer length in side chains and condensed matters for the molecular structure aiming; seeking the adjustable orderly, multi-level and multi-scale new nanomaterial by conventional techniques is difficult to obtain. 2) Exploring the process that integrating MJLCPs and nanostructure units, systematically researching the aggregation state of LCPs in the chemical and physical environment, and multilevel self-assembly and functional performance in bulk, thin film and solution; discussing the relationship between the structure and the condensed matters, multi-level self-assembly and performance in LCPs. 3) Exploring the relationship between the crystallinity, the liquid crystallinity of nanostructures in the side-chain and the self-assembly property and rheological property of the LCPs; developing the various applications, including nanostructures material, optoelectronic devices and other potential applications. The project on LCPs containing multiple nanostructure units has not been studied.

本项目中，设计合成一系列以聚降冰片烯为主链、侧基含有POSS和苝酰亚胺纳米基元的甲壳型液晶聚合物为研究对象。主要研究内容：1）研究侧链纳米结构基元和间隔基长度与液晶聚合物体系的凝聚态结构之间关系，探索制备用传统技术难以获得的可调有序、多层次、多尺度新型材料。2）利用甲壳型聚合物结构特点，系统研究液晶聚合物侧基间隔基长度、纳米结构基元随外界化学物理环境变化的聚集态与在本体、薄膜、溶液中组装、有序结构构筑和性能，考察外场（特别是电场）对链构象及凝聚态结构稳定性影响，探讨该类体系的结构与凝聚态、多级自组装和性能之间的变化规律。3）根据液晶聚合物结构特点，系统研究侧链纳米结构基元的结晶、液晶相行为与液晶聚合物自组装性质及流变性能之间的关系，发展制备器件的理论方法和实验技术，探索这类特殊拓扑结构在光电器件等功能材料方面的潜在应用。本项目关于含多重纳米结构基元的液晶聚合物的研究国内外尚属空白。

本项目设计合成了一系列以聚降冰片烯为主链、侧基含有1D、3D纳米基元的甲壳型液晶共聚合物，开展了系统的结构与性能研究，获得以下重要研究成果：1）系统研究了侧链纳米结构基元与液晶聚合物体系的凝聚态结构之间关系，探索了制备用传统技术难以获得的可调有序、 多层次、多尺度新型材料，建立了多种可控合成嵌段共聚物刷体系的方法，解决了功能性嵌段共聚物刷体系构筑方法学问题；2）利用甲壳型聚合物结构特点，系统研究了液晶聚合物在本体、薄膜、溶液中组装、有序结构构筑和性能，探讨了该类体系的结构与凝聚态、多级自组装和性能之间的变化规律；3）突破传统分子设计概念，提出了以甲壳型聚合物为刚性侧链聚合物，构建了多个功能性聚合物刷体系，开展了聚合物刷的分子结构与离子传导性等关系的系统研究，获得了其固体聚合物电解质，宽温域：-25 ~ 200 oC ，-25 oC离子电导率4×10−4 S/cm，室温下离子电导率能够达到 10-3 S/cm，200oC离子电导率4×10−3 S/cm，探讨了在锂离子电池器件上的潜在应用，预示该聚合物刷体系具有广阔的功能材料应用开发前景。