氢键侧链修饰共轭聚合物骨架的自愈合发光弹性体的设计合成与性能研究

Design, Synthesis and Properties of Self-healing Luminescent Elastomers with Hydrogen-bonded Side-chain-modified Conjugated Polymer Backbones

基于共轭聚合物骨架的自愈合弹性体对于可拉伸电子至关重要.本文工作通过氢键侧链来调控共轭聚合物的机械性能以及自愈性能,同时确保发光共轭聚合物保持固有的光物理特性.设计并制备了高性能的可拉伸自愈合发光弹性体,其机械拉伸长度接近900%,常温下的自愈效率达到70%,且发光量子效率超过60%.这种发光弹性体在经历400%的拉伸形变并回复后,不仅机械性能能够恢复,光物理性质也恢复如初.利用该弹性体,制备了多功能的光电器件.

Traditional optoelectronic devices suffer from loss of performance due to prolonged use,unavoidable deformation and fracture.To address this issue,it is significant to develop optoelectronic functional materials with strong mechanical tensile properties and self-healing abilities.Herein,we propose a design strategy for self-healing luminescent elastomers based on conjugated polymer backbones.The mechanical tensile properties and self-healing properties of the conjugated polymer are modulated by flexible hydrogen-bonded side chains,while maintaining the intrinsic photophysical characteristics.The synthesized elastomers exhibit excellent mechanical tensile properties(breaking tensile length:900%),room-temperature self-healing properties(self-healing efficiency:70%),and high fluorescence quantum efficiency(66%).Importantly,the photophysical properties of the elastomer were essentially fully recovered after undergoing 400%tensile deformation.In addition,we developed multifunctional optoelectronic devices using the prepared elastomers.This study provides a potential design strategy for developing materials for elastic optoelectronic devices.