相界面驱动聚合物基量子点荧光有序组装体的设计及其功能研究

项目名称： 相界面驱动聚合物基量子点荧光有序组装体的设计及其功能研究

项目编号： No.21506095

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 有机化学

项目作者： 杨胜洋

作者单位： 扬州大学

项目金额： 21万元

中文摘要： 当前，以半导体量子点与聚合物“自下而上”的组装，实现其功能的集成、调制和性能强化依然是材料化学工程领域的热点之一。如何克服荧光量子点在聚合物中的相分离和功能失效是关键。本项目以构筑结构有序、性能可调的聚合物基量子点复合材料为目的，从量子点的表面化学特性以及嵌段共聚物的分子结构设计出发，实现聚合物和荧光量子点的在相界面驱动下的有序可控集成。首先，采用催化链转移聚合和点击化学制备结构、分子量以及性能可控的嵌段共聚物，并以此为主体与量子点在液液界面限域条件下达到精密组装。重点研究嵌段共聚物与量子点在微观界面组装过程中的运动规律、能量传递、化学反应对目标材料功能的影响。同时，通过深入研究量子点与嵌段共聚物的结构和形态对有序复合材料的物理和化学性能的影响，考察有序复合材料的组成和微观结构与宏观性能之间的内在联系，最终掌握聚合物基量子点复合材料的结构功能一体化，实现其在光电器件和防伪编码领域的新应用。

中文关键词： 界面组装；催化链转移聚合；量子点；点击化学；嵌段共聚物

英文摘要： Currently, the investigation of semiconductor quantum dots (QDs) with polymer bottom-up assembly is still one of the hot topics in the field of materials-oriented chemical engineering due to the urgent requirement in the development of new materials with integrated, regulatable, and enhanced functions. However, the challenge still remains to overcome the phase-separation between semiconductor QDs and polymers, as well as the functional failure of QDs in the assembly process. Considering the surface properties of QDs and molecular structures of polymers, this project aims at the fabrication of functional polymer-QDs nanocomposites with ordered and controllable properties via liquid-liquid phase-interface-driven assembly method. Initially, the block copolymers with controllable molecular structures and unqiue properties will be designed and synthesized via the combination of catalytic chain transfer polymerization and click chemistry. After that, the as-prepared block copolymers will be as building host to precisely assemble with QDs at the confined liquid-liquid interface. The motion law, energy transfer and chemical reaction between QDs and block copolymers will significantly influence the performance of the target assembly objects, and these factor will be seriously investigated under the microscopic interface assembly process by divese analytic techniques. Meanwhile, by studying the intrinsic relations between the components, microscopic structures and macroscopic performance of these nanocomposites, we will deeply understand the effects of the structures, morphology of the nanocomposites on their physical and chemical properties. In addition, we will explore the interfacial assembly laws of the block copolymers and QDs under restrictive conditions with external fields. These studies will allow us to integrate structures and functions of the nanocomposites together to achieve their application in photoelectrical and anti-counterfeiting code fields.

英文关键词： Interface Assembly;Catalytic Chain Transfer Polymerization;Quantum Dots;Click Chemistry;Block Copolymer