One-step dip-coating method for preparation of ceramic nanofiber membrane with high permeability and low cost. Issue 16 (December 2021)

• Record Type: Journal Article
• Authors: Yang, Yulong; Fu, Wanyi; Chen, Li; Hou, Congyu; Chen, Xixi; Zhang, Xihui
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 16(2021)
• Page Start: 358
• Page End: 368
• Publication Date: 2021-12
• Subjects: One-step dip-coating -- Attapulgite -- Ceramic nanofiber membrane -- Sintering temperature -- Permeability; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.09.049
• Languages: English
• ISSNs: 0955-2219

Abstract

Graphical abstract: Highlights: Low-cost ceramic nanofiber membranes (CNMs) were fabricated with attapulgite (APT). APT-based CNMs have satisfactory mechanical strength and high water permeability. Based on the fractal theory, the permeability of APT-based CNMs was analyzed. A rejection of 96.6 % polymers with a molecule weight of 600 kDa was achieved. Abstract: Ceramic nanofiber membrane (CNM) based on attapulgite (APT) without any intermediate layer neither any cracks was fabricated by a one-step dip-coating method. The effects of sintering temperature and dip-coating time on the physicochemical properties and performances of prepared CNMs were investigated. The increase of the sintering temperature up to 700 °C reduced the bending strength, porosity and chemical stability of APT-based CNMs. Meanwhile, with the dip-coating time increased, the membrane thickness increased thereafter reduced. The APT-based CNM fabricated at a sintering temperature of 600 °C and with a dip-coating time of 15 s had an average pore size of 20.4 nm, high porosity (above 60 %), good permeability of 118 L/m 2 h bar and a rejection of 96.6 % polymers with a molecule weight of 600 kDa. All these properties clearly suggest the practicability of the one-step dip-coating method to prepare ceramic nanofiber membranes.