Show simple item record

AuthorNg Z.C.
AuthorLau W.J.
AuthorWong K.C.
AuthorAl-Ghouti M.A.
AuthorIsmail A.F.
Available date2022-05-31T19:01:12Z
Publication Date2021
Publication NameSeparation and Purification Technology
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.seppur.2021.119035
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85110441700&doi=http://dx.doi.org/10.1016%2fj.seppur.2021.119035&partnerID=40&md5=be344680ba1575e895de12e2e8299936
URIhttp://hdl.handle.net/10576/31759
AbstractIn this work, the polyethyleneimine (PEI)-interlayered thin film nanocomposite (iTFN) membranes were developed by establishing graphene oxide (GO)-incorporated polyamide (PA) layer atop PEI-coated polysulfone (PSf) substrate for reverse osmosis process. The effects of PEI layer sandwiched between selective layer and substrate were studied by varying several main parameters of the PEI coating process, i.e., PEI concentration (0.005–0.2 wt/v%), drying time (0–120 min), and coating layer number (1–3 layers). The positively charged PEI interlayer was found to alter not only the hydrophilicity and pore structure of the substrate but also improve the orientation and distribution of deposited GO through electrostatic interaction. Synergic effects of GO and PEI, including enhanced substrate surface hydrophilicity and increased amine content, eventually formed a rough but thin PA layer. As a result, almost all iTFN membranes exhibited higher NaCl rejection and water permeability than the control TFN membrane (without PEI intermediate layer). This experiment revealed that PSf substrate modified with a single layer of 0.05 wt/v% PEI followed by 60-min drying yielded the TFN membrane (i.e., iTFN-C0.05-T60-L1) with the best desalination performances (96.66% NaCl rejection and 2.24 L/m2·h·bar). The control TFN membrane meanwhile showed lower performance, i.e., 95.61% NaCl rejection and 1.69 L/m2·h·bar.
Languageen
PublisherElsevier B.V.
SubjectGraphene oxide
Membrane modification
Membrane-based desalination
Polyethyleneimine
Reverse osmosis
TitleImproving properties of thin film nanocomposite membrane through polyethyleneimine intermediate layer: A parametric study
TypeArticle
Volume Number274
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record