Yan Changyou, Ma Shuanhong, Ji Zhongying, Guo Yuxiong, Liu Zhilu, Zhang Xiaoqin, Wang Xiaolong
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100039, China.
Polymers (Basel). 2019 May 1;11(5):774. doi: 10.3390/polym11050774.
Currently, many meshes, membranes, and fabrics with extreme wettability of superhydrophobicity/superoleophilicity, or superhydrophilicity and underwater superoleophobicity are promising candidates for oil/water mixture separation. Nevertheless, a facile yet effective way to design and fabricate porous mesh still remains challenging. In this work, fused deposition modeling (FDM) 3D printing of Fe/polylactic acid (PLA) composites was employed to fabricate superhydrophilic and underwater superoleophobic mesh (S-USM) with hydrogel coatings via the surface polymerization of Fe(II)-mediated redox reaction. In addition, salt of aluminum chloride was incorporated within the hydrogel coating, which was attributed to strengthening the demulsification of oil-in-water emulsions, resulting in efficient separation of oil-in-water mixtures. The S-USM was efficient for a wide range of oil-in-water mixtures, such as dodecane, diesel, vegetable oil, and even crude oil, with a separation efficiency of up to 85%. In this study, the flexible design and fabrication of 3D printing were used for the facile creation of spherical oil skimmers with hydrogel coatings that were capable of removing the floating oil. Most importantly, this work is expected to promote post-treatment processes using 3D printing as a new manufacturing technology and, in this way, a series of devices of specific shape and function will be expanded to satisfy desired requirements and bring great convenience to personal life.
目前，许多具有超疏水/超亲油或超亲水及水下超疏油极端润湿性的网、膜和织物是油水混合物分离的有前景的候选材料。然而，设计和制造多孔网的简便而有效的方法仍然具有挑战性。在这项工作中，采用铁/聚乳酸（PLA）复合材料的熔融沉积建模（FDM）3D打印，通过铁（II）介导的氧化还原反应的表面聚合来制备具有水凝胶涂层的超亲水和水下超疏油网（S-USM）。此外，在水凝胶涂层中加入了氯化铝盐，这归因于增强了水包油乳液的破乳作用，从而实现了水包油混合物的高效分离。S-USM对多种水包油混合物，如十二烷、柴油、植物油甚至原油都有效，分离效率高达85%。在本研究中，3D打印的灵活设计和制造被用于轻松创建具有水凝胶涂层的球形撇油器，该撇油器能够去除浮油。最重要的是，这项工作有望推动将3D打印作为一种新的制造技术用于后处理过程，通过这种方式，一系列具有特定形状和功能的设备将得到扩展，以满足所需要求并给个人生活带来极大便利。
