Zhang Zewen, Bao Yueping, Sun Xun, Chen Ke, Zhou Mingjiong, He Liu, Huang Qing, Huang Zhengren, Chai Zhifang, Song Yujie
School of Materials Science and Chemical Engineering, Ningbo University, Fenghua Road 818, Jiangbei District, Ningbo, Zhejiang 315211, P. R. China.
Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, No. 1219 Zhongguan West Road, Zhenhai District, Ningbo, Zhejiang 315201, P. R. China.
ACS Omega. 2020 May 5;5(19):11100-11105. doi: 10.1021/acsomega.0c01021. eCollection 2020 May 19.
Membrane separation has been widely used in water purification, and mesoporous ceramic membranes show a high potential in the future because of their high stability and resistance to harsh environments. In the current study, a novel polymer-derived ceramic silicon oxycarbide (SiOC) membrane was developed via a preceramic reactive self-sacrificed method and was further applied in a homemade dead-end system for water purification. A cyclosiloxane hybrid polymer was selected as the precursor and polydimethylsiloxane (PDMS) was used as the sacrificial template. Membrane pores were formed because of template removal during the sintering process, creating channels for water transportation. The pore size and porosity could be readily adjusted by changing the amounts and types of PDMS used in the fabrication process. The as-prepared SiOC membrane showed a high water permeability (140 LMH@2.5 bar) and high removal rate of rhodamine B (RhB), demonstrating its potential applications in water treatment. This work would provide an easy and scalable method to prepare ceramic membranes with a controlled pore size, which could be used for different water treatment applications.
膜分离已广泛应用于水净化领域，介孔陶瓷膜因其高稳定性和耐恶劣环境性在未来具有很大潜力。在当前研究中，通过一种陶瓷前驱体反应自牺牲法制备了一种新型聚合物衍生陶瓷碳氧化硅（SiOC）膜，并将其进一步应用于自制的死端系统中进行水净化。选择环硅氧烷杂化聚合物作为前驱体，聚二甲基硅氧烷（PDMS）作为牺牲模板。在烧结过程中由于模板去除形成了膜孔，从而为水传输创造了通道。通过改变制备过程中使用的PDMS的量和类型，可以很容易地调节孔径和孔隙率。所制备的SiOC膜表现出高水渗透性（140 LMH@2.5 bar）和对罗丹明B（RhB）的高去除率，证明了其在水处理中的潜在应用。这项工作将提供一种简单且可扩展的方法来制备孔径可控的陶瓷膜，可用于不同的水处理应用。
