Covalent organic frameworks (COFs) are emerging materials with structural modularity that allows their applications in many fields. The aim of this work is to determine the environmental impact of using an imine based covalent organic framework (RT-COF-1) for both surface printing (Case A) and 3D inkjet printing (Case B) by applying Life Cycle Assessment (LCA) methodology. Experimental data on its synthesis as well as results obtained by simulation of RT–COF–1 precursors synthesis, 1,3,5-tris-(4-aminophenyl) benzene (TAPB) and 1,3,5-benzenetricarbaldehyde (BTCA), are used. LCA results show that monomers synthesis are the most important contributors to environmental impacts in both case studies. On the other hand, the contribution of solvents used in Case A is also remarkable. The comparison between both case studies indicates that the environmental impacts of Case B is lower than that of Case A (reduction within 5%–65%). Finally, LCA results of Case B are compared to other materials used for 3D-printing, such as polymerizable ionic liquids (PILs). The results show that RT–COF–1 compares favourably with PILs in five of nine impact categories, being especially relevant the reductions achieved in the abiotic depletion and acidification potential (>90%), in the primary energy consumption (⁓35%) and carbon footprint (⁓50%), suggesting the potential of RT–COF–1 as 3D-printing material from an environmental perspective. This work is a first step for further research to highlight the main environmental burdens of using COF-based materials in this application.

共价有机框架 (COF) 是具有结构模块化的新兴材料，使其可以在许多领域得到应用。这项工作的目的是通过应用生命周期评估 (LCA) 来确定使用基于亚胺的共价有机框架(RT-COF-1)进行表面打印（案例 A）和 3D 喷墨打印（案例 B）的环境影响方法。其合成的实验数据以及通过模拟 RT-COF-1 前体合成、1,3,5-三-(4-氨基苯基)苯 ( TAPB )和1,3,5-苯三甲醛 ( BTCA ) 获得的结果), 被使用。LCA 结果表明，在两个案例研究中，单体合成是对环境影响最重要的贡献者。另一方面，案例 A 中使用的溶剂的贡献也很显着。两个案例研究之间的比较表明，案例 B 的环境影响低于案例 A（减少在 5%–65% 以内）。最后，案例 B 的 LCA 结果与用于 3D 打印的其他材料（例如可聚合离子液体 (PIL)）进行了比较。结果表明，RT-COF-1 在九个影响类别中的五个方面优于 PIL，尤其是在非生物耗竭和酸化潜力 (>90%)、一次能源消耗 (⁓35%) 和碳足迹 (⁓50%), 从环境角度暗示 RT-COF-1 作为 3D 打印材料的潜力。这项工作是进一步研究的第一步，以强调在此应用中使用基于 COF 的材料的主要环境负担。