AuthorsMahalingam, Dinesh K.
Da Costa, Pedro M. F. J.
Nunes, Suzana Pereira
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Imaging and Characterization Core Lab
Material Science and Engineering Program
Nanostructured Polymeric Membrane Lab
Physical Science and Engineering (PSE) Division
Online Publication Date2020-03-09
Print Publication Date2020-07
Embargo End Date2022-02-24
Permanent link to this recordhttp://hdl.handle.net/10754/661664
MetadataShow full item record
AbstractAdvances in process intensification in the chemical and pharmaceutical industry depends on the availability of more sustainable separation methods. For this progress, membranes with high stability in organic solvents are needed. GO-coated membranes could be advantageous in these applications, being chemically, thermally and mechanically stable. However, simple, scalable, low-cost fabrication methods, particularly for GO deposition on hollow fibers are still in an early phase. We propose here a simple spray-coating method for deposition of GO sheets on crosslinked hollow fiber supports. We first fabricated polyetherimide hollow fiber membranes and crosslinked them with hexamethylene diamine. These supports have strong tolerance to various organic solvents. The amide reaction arising between the imide groups of polyetherimide and the amine groups of hexamethylene diamine provide even higher chemical and mechanical stability. Thereafter, the spray-coating of GO dispersions led to the formation of a stable selective layer on the hollow fibers. An excellent adhesion between GO and the substrate was achieved. The chemical reasons for that were investigated by solid state NMR. Overall, this simple method enables the application of GO hollow fiber membranes in organic solvent nanofiltration, with high performance demonstrated in water and acetone.
CitationMahalingam, D. K., Falca, G., Upadhya, L., Abou-Hamad, E., Batra, N., Wang, S., … Nunes, S. P. (2020). Spray-coated graphene oxide hollow fibers for nanofiltration. Journal of Membrane Science, 606, 118006. doi:10.1016/j.memsci.2020.118006
SponsorsThe authors thank King Abdullah University of Science and Technology (KAUST), grant BAS/1/1057-01-01 and URF/1/3441-01-01 for the financial support. The authors thanks Duong Phuoc for help on the PEI crosslinking protocol.
JournalJournal of Membrane Science