Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.memsci.2020.118294
Title: One-step Cross-linking and Tannic Acid Modification of Polyacrylonitrile Hollow Fibers for Organic Solvent Nanofiltration
Authors: Than Hui Min 
Chung Tai-Shung 
Keywords: Biophenols
Hollow Fibers
Organic solvent nanofiltration (OSN)
Polyphenols
Tannic Acid
Issue Date: 27-May-2020
Publisher: Elsevier
Citation: Than Hui Min, Chung Tai-Shung (2020-05-27). One-step Cross-linking and Tannic Acid Modification of Polyacrylonitrile Hollow Fibers for Organic Solvent Nanofiltration. Journal of Membrane Science 610 (May). ScholarBank@NUS Repository. https://doi.org/10.1016/j.memsci.2020.118294
Abstract: Simple and versatile modification techniques are highly sought after in the field of membrane science. However, common procedures such as interfacial polymerization require multiple solutions and several steps, particularly when dealing with hollow fiber membranes. In line with strategies laid out for fabricating greener membranes, we report a single-step cross-linking and modification process involving only an aqueous solution of the naturally-occurring tannic acid (TA) and hydrazine for polyacrylonitrile-based hollow fibers. Hydrazine plays a dual role of cross-linking the polyacrylonitrile while forming bonds with TA to yield a robust modification. By simply changing the amount of TA used, hollow fibers with different filtration properties can be obtained, as demonstrated by standard pore size tests using aqueous feeds. TA may even penetrate into the membrane bulk and further improve its mechanical properties. Solvent-related tests such as immersion tests and pure solvent permeation are first conducted for a preliminary understanding of membrane performance. To further demonstrate the efficacy of the one-step modification, organic solvent feeds, such as dyes dissolved in methanol, are employed in nanofiltration tests using these hollow fibers. Long-term tests reveal a stable methanol permeance of 1.2 L m-2 h-1 bar-1 and sustained 100% rejection of Evans Blue (Mw = 960.81 g mol-1). Thus, with each reagent playing several roles in this one-step process, a greener yet simple modification method is established for polyacrylonitrile-based membranes and materials.
Source Title: Journal of Membrane Science
URI: https://scholarbank.nus.edu.sg/handle/10635/171687
ISSN: 03767388
DOI: 10.1016/j.memsci.2020.118294
Appears in Collections:Staff Publications
Elements

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
THM4 Crosslinking and Tannic Acid Modification of PAN HF for OSN (Journal Pre-proof) JMS 2020.pdf3.43 MBAdobe PDF

OPEN

Post-printView/Download

Page view(s)

77
checked on Feb 19, 2021

Download(s)

2
checked on Feb 19, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.