Surface modified polyamide nanofiltration membranes with high permeability and stability

High performance membranes circumventing the global water scarcity are emerging from exquisite nanofabrication but the materials preparation complexity and permeability stability remain challenges. We report here that both the permeability and antibacterial property of piperzine-trimesoyl chloride (...

Full description

Saved in:
Bibliographic Details
Published in:Journal of membrane science 2019-12, Vol.592, p.117386, Article 117386
Main Authors: Peng, Huawen, Tang, Qingquan, Tang, Sihan, Gong, Jiang, Zhao, Qiang
Format: Article
Language:English
Subjects:
Antibacterial
Nanofiltration
Polyamide membrane
Quaternary ammonium
Surface modification
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High performance membranes circumventing the global water scarcity are emerging from exquisite nanofabrication but the materials preparation complexity and permeability stability remain challenges. We report here that both the permeability and antibacterial property of piperzine-trimesoyl chloride (PIP-TMC) polyamide nanofiltration membranes were improved through simple surface modification by a strong electrolyte monomer bearing a multiple of amines and quaternary ammonium (Quaternized diaminoethylpiperzine, QAEP). The new monomer reacts effectively with residual acyl chloride groups on pristine membranes, bringing about the synergy of improved hydrophilicity with surface microstructures that facilitates high way path for transmembrane transportation of water molecules. The PIP-TMC-QAEP membrane exhibit high salt rejection (RNa2SO4 = 97.8%, RMgSO4 = 94.2%), coupled with high permeate flux (96 L m-2 h-1, feed: 1 g L-1 Na2SO4, 6 bar) that is 3 times as high as that of the PIP-TMC membranes. Meanwhile the membrane features a high salt selectivity (30) in processing NaCl/Na2SO4 mixed solution (10 g L-1), coupled with satisfactory performances against fouling and biofouling and elongated continuous operation time (12 days). High permeability nanofiltration membranes coupled with salt selectivity and performance stability were prepared through facile surface modification by a quaternary ammonium monomer, pointing to new routes to advanced water treatment membranes. [Display omitted] •A new monomer with quaternary ammonium was exploited for surface modification.•The flux of modified membrane is 3.3 times as high as that of PIP-TMC membranes.•The modified membrane features high antibacterial properties and good stability.
ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2019.117386