PEDOT衍生物的固/气界面聚合制备及其电致变色性能研究

Preparation of PEDOT Derivatives by Solid/Gas Interfacial Polymerization and Its Electrochromic Properties Study

聚(3,4-乙撑二氧噻吩)(PEDOT)作为一种经典的导电聚合物(CPs)在电致变色领域具有广阔的应用市场。目前常规技术化学氧化法制备PEDOT及其衍生物(PEDOTs)虽然廉价快速,但所得聚合物容易呈粉末状,且这些粉末状聚合物在常见溶剂中溶解性差,进一步加工无法得到高质量薄膜。通过气相聚合(VPP)技术可以制备部分高质量的PEDOTs薄膜,但是这一技术局限于可以汽化的有机小分子。为此,本文设计了一种3,4-乙撑二氧噻吩(EDOT)的衍生物BT-4EDOT,借鉴VPP技术,将单体汽化过程用单体溶液喷涂方式代替,利用固/气界面聚合制备了均相薄膜。实验结果表明,利用该方法制备出的P(BT-4EDOT)薄膜具有良好的电化学活性及电致变色性能。

Poly(3-ethylenedioxythiophene)(PEDOT), as one of classical conductive polymers(CPs), has a broad application market in the field of electrochromism. Although the preparation of PEDOT and its derivatives(PEDOTs) by the conventional chemical oxidation method is low-cost and fast, the obtained polymers are powdered. These powders have poor solubility in common solvents, so high-quality films cannot be obtained by further processing. Some highquality PEDOTs films can be prepared by vapor-phase polymerization(VPP) technology, but this technology is limited to small organic molecules that can be vaporized. So a derivative of 3,4-ethylenedioxythiophene(EDOT), BT-4EDOT,was designed in this work. Referring to VPP technology, this paper prepared homogeneous films through gas-interface polymerization, which replaces the process of molecular vaporization with spraying. The experimental results show that the P(BT-4EDOT) thin films prepared by this method have good electrochemical activity and electrochromic properties.