两嵌段共聚物对量子点/环氧树脂纳米复合材料的界面增容机理研究

项目名称： 两嵌段共聚物对量子点/环氧树脂纳米复合材料的界面增容机理研究

项目编号： No.51203007

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 有机高分子材料学科

项目作者： 邹威

作者单位： 北京化工大学

项目金额： 25万元

中文摘要： 针对量子点与环氧树脂界面不匹配引起的严重团聚，造成纳米复合材料透明度和荧光强度普遍降低的问题，本申请提出双亲共聚物对两相界面的增容研究。采用原子转移自由基聚合制备两嵌段的增容剂，其聚甲基丙烯酸正丁酯链段的脂肪族侧链浸润量子点表面的油酸配体，同时聚甲基丙烯酸缩水甘油酯链段浸润环氧基体，获得良好的界面增容效果。研究各嵌段分子量的聚合动力学控制因素；进一步考察分子量对增容过程的热力学和动力学影响规律；分析量子点本征光学性能的变化规律；最终阐明界面结构同量子点分散能力和纳米复合材料光学行为的关联机制等关键科学问题。研究意义旨在确立高透明度、高荧光效率的量子点/环氧树脂白光LED封装材料制备的优化方法。本申请的宗旨是通过功能性增容剂的设计和使用，提升量子点半导体荧光纳米材料在聚合物基复合材料中的性能表现，为开发新型光电材料提供思路和基础研究数据。

中文关键词： 环氧树脂；量子点；纳米复合材料；界面；光学性能

英文摘要： The incompatible interface of quantum dots (QDs)/epoxy nanocomposite directly caused serious aggregation of QDs, and eventually decreased transparent and luminescent of nanocomposite. Because butyl could assemble with oleic acid ligand on QDs and glycidyl could match epoxy matrix respectively, poly (methyl n-butyl acrylate)-(glycidyl methacrylate) block copolymer was designed for solve the problem of polar mismatch at nanocomposite interface. Atom transfer radical polymerization was utilized to synthesize molecular weight controlled copolymer compatibilizer. And then, the process of compatibilizer assembly behavior at the interface was described by kinetic and thermodynamics. Besides, the influences of QDs optical properties were investigated after compatibilizer assembly. Finally, crucial relationships between interface structure and properties of QDs/epoxy nanocomposite were clarified and connected. The as-prepared highly transparent and luminescent QDs/epoxy nanocomposite had potential applications in light-emitting diode encapsulating materials. And the ideas and basic research data of this application could also be utilized for enhance the performance of QDs/polymer matrix nanocomposite.

英文关键词： epoxy；Quantum Dots；nanocomposite；interface；Optical Properties