Abstract:

Covalent organic framework polymers (COFs) connected by covalent bonds are ordered porous organic crystals prepared by reversible thermodynamic polymerization. With the characteristics of large specific surface area, adjustable regular pore distribution and detachable structure, COFs functional membranes with two dimensions or three dimensions have been promising in gas separations, chemical sensors, catalysts, drug delivery, etc. The molecule compositions, micro-structures, and performances of COFs membranes are determined by their preparation methodology, which has been a research basis and a key technology for the application of COFs functional membranes. In this paper, recent developments and promising trends of preparing COFs functional membranes, including blending method of COF, in-situ polymerization method, exfoliation and assembly method and interfacial polymerization method, were reviewed and the merits and limitations of each preparation method were analyzed. The research direction and key technical points of each technology in fabricating COFs functional membranes were summarized, and the reasonable preparation methods from the molecule design, functional optimization and potential applications were proposed to promote the formation of preparation methods of high performance COFs membranes in the future.

Key words: covalent organic framework polymer (COFs) membranes, blending method, in-situ polymerization, layer by layer stacking method, interfacial polymerization

摘要：

共价有机骨架聚合物（COFs）是由共价键连接，经热力学可逆聚合形成的有序多孔有机晶态材料，具有比表面积大、孔分布规则可调和可拆剪等特性，其二维或三维COFs功能膜在气体分离、化学传感、催化、药物传输等方面具有广阔的发展前景。COFs膜材料的制备决定膜组成、微规整结构和性能，成为COFs膜功能应用的研究基础和技术关键。本文综述了COFs材料提出以来形成的共混法、原位聚合法、层层堆叠法和界面聚合等制备方法的研究现状，结合各方法优缺点，分析并提出COFs膜制备技术的关键方向和技术要点。为COFs功能膜分子设计、优化和功能化应用提供合理的制备方法，促进高性能COFs功能膜实用化制备方法的形成。

关键词: 共价有机骨架聚合物膜, 共混法, 原位聚合法, 层层堆叠法, 界面聚合