Key Laboratory of Low-grade Energy Utilization Technologies & Systems of the Ministry of Education National-Municipal Joint Engineering Laboratory for Chemical Process Intensification and Reaction School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 400044, P. R. China.
Chem Asian J. 2020 Nov 2;15(21):3421-3427. doi: 10.1002/asia.202000872. Epub 2020 Sep 30.
COFs were synthesized by a microwave-assisted solvothermal route, with the building blocks containing 1,3,5-tris(4-aminophenyl) benzene and 2,3,5,6-tetra-fluoroterephthalaldehyde (or 1,4-phthalaldehyde). The -F groups introduced into the benzene ring promoted hydrophobicity and stability of the COFs. The universality and long effectiveness of oil adsorption can be realized when applying COFs as adsorbent. The powder also exhibited excellent water-in-oil emulsions separation performance, with the separation efficiency no lower than 99.5%. In this work, the use of microwave solvothermal synthesis of superhydrophobic COFs is potential to replace the conventional synthesis process and more suitable for industrial scale-up production. Furthermore, the findings provide a new strategy for solving the problem of oil spill treatment and industrial water-in-oil emulsions separation by using the emerging 2D COFs.
COFs 是通过微波辅助溶剂热法合成的，其构筑单元包含 1,3,5-三(4-氨基苯基)苯和 2,3,5,6-四氟对苯二甲醛（或 1,4-苯二甲醛）。苯环上引入的 -F 基团提高了 COFs 的疏水性和稳定性。当 COFs 用作吸附剂时，可以实现对油吸附的通用性和长效性。粉末还表现出优异的油水乳液分离性能，分离效率不低于 99.5%。在这项工作中，使用微波溶剂热合成超疏水 COFs 有望替代传统的合成工艺，更适合工业规模生产。此外，该研究结果为利用新兴的二维 COFs 解决溢油处理和工业油水乳液分离问题提供了新策略。
