Effect of coating and surface modification on water and organic solvent nanofiltration using ceramic hollow fiber membrane. Issue 24 (15th December 2021)

• Record Type: Journal Article
• Authors: Lee, Hong Joo; Kim, Seong-Joong; Kim, Yeojin; Park, Hosik; Park, You-In; Nam, Seung Eun
• Is Part Of: Ceramics international. Volume 47:Issue 24(2021)
• Page Start: 34020
• Page End: 34027
• Publication Date: 2021-12-15
• Subjects: Ceramic membrane -- Hollow fiber membrane -- Nanofiltration -- Coating -- Surface modification; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.08.310
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Nanofiltration ceramic hollow fiber membranes were developed to simplify the manufacturing process and improve water and organic solvent permeation performance. The alumina hollow fiber support was prepared by a phase-inversion/sintering method, and a γ-Al2 O3 sol was coated thereon as a selective layer. Polyvinyl alcohol and ethanol were used as the drying control chemical additive in the coating solution, so that a coating layer could be formed without defects in only one coating step. The coating layer thickness could be adjusted to 0.6–2 μm depending on the coating drawing speed. A sintering temperature of 350 °C was selected to provide both reasonable water permeability (6.91 LMH/bar) and rejection (a molecular weight cutoff of 1000 Da or less) and to form a stable γ-Al2 O3 phase. In the case of a membrane that was surface-modified with (3-chloropropyl)-trimethoxysilane, the permeability of toluene and hexane was 2.3 and 4.3 LMH/bar, respectively. The newly developed ceramic membrane showed excellent permeability and separation properties, as well as potential effectiveness for organic solvent nanofiltration applications.