Dong Shaofeng, Li Songtao, Yang Ziyi, Zhang Jinni, Zhang Qiuting, Wang Shuyi, Zhong Yanhui, Lin Zian
Ministry of Education Key Laboratory of Analytical Science for Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
Ministry of Education Key Laboratory of Analytical Science for Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China.
J Colloid Interface Sci. 2025 Dec 15;700(Pt 2):138527. doi: 10.1016/j.jcis.2025.138527. Epub 2025 Jul 23.
The massive discharge of oily wastewater and the frequent occurrence of oil spills have posed serious threat to human. Hence, it is important to develop functional materials and related methods to achieve efficient oil/water separation. Herein, a new superhydrophobic COF (named SCOF) was designed and successfully synthesized with functional alkoxy side chains at room temperature for the first time and was then applied to oil/water separation. By loading SCOF onto the fabric, the prepared superhydrophobic Fabric@SCOF membrane could effectively separate different oil/water mixtures, and the separation efficiency was higher than 99 %. Noteworthy, when separating immiscible CHCl/water mixture, the maximum oil flux was 63,129 L m h and the separation efficiency reached 99.8 %. To the best of our knowledge, this was the highest oil flux of superhydrophobic COF-based membrane prepared on the fabric substrate for the separation of immiscible oil/water mixture only in gravity. By loading SCOF onto porous melamine sponge, the fabricated Sponge@SCOF could adsorb different oils, and the adsorption capacity for CCl could reach 151 g/g. This work provides insights for the design and synthesis of novel functional COFs, and broadens the application of COF-based superhydrophobic composite in oil/water separation, which is of great significance for oily wastewater treatment and environmental remediation.
大量含油废水的排放以及频繁发生的石油泄漏对人类构成了严重威胁。因此，开发功能性材料及相关方法以实现高效的油/水分离具有重要意义。在此，首次在室温下设计并成功合成了一种带有功能性烷氧基侧链的新型超疏水共价有机框架材料（命名为SCOF），并将其应用于油/水分离。通过将SCOF负载到织物上，制备的超疏水织物@SCOF膜能够有效分离不同的油/水混合物，分离效率高于99%。值得注意的是，在分离不互溶的CHCl/水混合物时，最大油通量为63129 L m⁻² h⁻¹，分离效率达到99.8%。据我们所知，这是在织物基底上制备的用于仅在重力作用下分离不互溶油/水混合物的超疏水COF基膜的最高油通量。通过将SCOF负载到多孔三聚氰胺海绵上，制备的海绵@SCOF能够吸附不同的油，对CCl₄的吸附容量可达151 g/g。这项工作为新型功能性COFs的设计与合成提供了思路，拓宽了COF基超疏水复合材料在油/水分离中的应用，对含油废水处理和环境修复具有重要意义。
