Liu Yang, Zhu Weiya, Guan Kang, Peng Cheng, Wu Jianqing
School of Materials Science and Engineering, South China University of Technology Guangzhou 510640 People's Republic of China
RSC Adv. 2018 Apr 11;8(24):13567-13577. doi: 10.1039/c7ra13195j. eCollection 2018 Apr 9.
The traditional dip-coating method for preparation of ceramic membranes requires a long drying time and easily produces drying defects. In this work, an improved dip-coating process was proposed. The UV curing technique was utilized to avoid crack formation and agglomeration of ceramic particles, for drying to be completed in a few minutes. Photosensitive resin and a photoinitiator were added into the aqueous ceramic suspension. Under the action of free radicals excited by ultraviolet light, a giant network formed in the green membrane within a short time which limits the migration of membrane particles. Experiments were performed to explore the influence of UV curing process on membrane properties and the optimum preparation conditions were obtained. Following a rapid drying treatment and firing, crack-free membranes were prepared, which exhibited a narrow pore size distribution centered at approximately 65.2 nm and a water permeance of 887 ± 48 L m h bar. The largest pore size of the membrane was 85.7 nm while it could filter out 98.2% of the 100 nm monosize PS microsphere and the 60.1% of 60 nm, indicating its potential application in both membrane production efficiency and separation accuracy improvements.
传统的用于制备陶瓷膜的浸涂法需要较长的干燥时间，并且容易产生干燥缺陷。在这项工作中，提出了一种改进的浸涂工艺。利用紫外线固化技术避免陶瓷颗粒的裂纹形成和团聚，从而在几分钟内完成干燥。将光敏树脂和光引发剂添加到陶瓷水悬浮液中。在紫外光激发的自由基作用下，生坯膜在短时间内形成巨大网络，限制了膜颗粒的迁移。进行实验以探索紫外线固化工艺对膜性能的影响，并获得了最佳制备条件。经过快速干燥处理和焙烧，制备出无裂纹的膜，其孔径分布狭窄，中心约为65.2 nm，水通量为887±48 L m h bar。膜的最大孔径为85.7 nm，同时它可以滤出98.2%的100 nm单分散聚苯乙烯微球和60.1%的60 nm微球，表明其在提高膜生产效率和分离精度方面的潜在应用价值。
