Zhou Mengmeng, Li Meng, Xu Fengjiao, Yang Yuanping, Pei Yongbing, Yan Yue, Wu Lianbin
Key Laboratory of Organosilicon Chemistry and Materials Technology, Ministry of Education, Hangzhou Normal University, Hangzhou 311121, P. R. China.
ACS Omega. 2021 Sep 8;6(37):24139-24146. doi: 10.1021/acsomega.1c03642. eCollection 2021 Sep 21.
In this work, a durable superhydrophobic fabric was fabricated by a facile covalent surface modification strategy, in which the anchoring of 10-undecenoyl chloride (UC) onto the fabric through the esterification reaction and covalent grafting of -dodecyl-thiol (DT) via thiol-ene click chemistry were integrated into one step. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) measurement results demonstrated that UC and DT were covalently grafted onto the fabric surface. The formed gully-like rough structure by the grafted UC and DT on the fabric surface together with the inherent microfiber structure, combined with the grafted low-surface-energy materials of UC and DT, gave the resultant modified DT-UC@fabric superhydrophobic performance. The superhydrophobic DT-UC@fabric was used for separation of oil-water mixtures; it exhibited high separation efficiency of more than 98%. In addition, it presented excellent durability against mechanical damage; even after 100 cyclic tape-peeling and abrasion tests, the DT-UC@fabric could preserve superhydrophobic performance, which was ascribed to the formed covalent interactions between the fabric surface and the grafted UC and DT. Therefore, this work provided a facile, efficient strategy for fabricating superhydrophobic composites with excellent durability, which exhibited a promising prospect in the application of self-cleaning and oil-water separation.
在这项工作中，通过一种简便的共价表面改性策略制备了一种耐用的超疏水织物，该策略将10-十一碳烯酰氯（UC）通过酯化反应锚定在织物上以及通过硫醇-烯点击化学将十二烷基硫醇（DT）共价接枝整合为一个步骤。傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）测量结果表明，UC和DT共价接枝到了织物表面。织物表面接枝的UC和DT形成的沟壑状粗糙结构与固有的微纤维结构相结合，再加上接枝的低表面能材料UC和DT，赋予了所得改性DT-UC@织物超疏水性能。超疏水的DT-UC@织物用于油水混合物的分离；它表现出超过98%的高分离效率。此外，它对机械损伤具有优异的耐久性；即使经过100次循环胶带剥离和磨损测试，DT-UC@织物仍能保持超疏水性能，这归因于织物表面与接枝的UC和DT之间形成的共价相互作用。因此，这项工作为制备具有优异耐久性的超疏水复合材料提供了一种简便、高效的策略，在自清洁和油水分离应用中展现出广阔的前景。
