Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 9, Issue 34, Pages 11388-11402Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c03313
Keywords
reverse osmosis membrane; fouling resistance; permeability; carbon nanotube; antibacterial property
Categories
Funding
- Qingchuang Science and Technology Plan of Shandong Province [2020KJC004]
- project of the Talent Introduction of Dezhou University [019xjrc201, 2019xjrc202, 2019xjrc211]
- Natural Science Foundation of Shandong Province [ZR2020MB114, ZR2019BC027]
Ask authors/readers for more resources
In this study, high-performance nanocomposite reverse osmosis membranes were fabricated by synthesizing functionalized carbon nanotubes and embedding silver nanoparticles. The membrane exhibited improved water permeability and NaCl rejection, as well as excellent fouling resistance to model foulants. The long-term performance stability of the membrane was attributed to the compatibility between carbon nanotubes and the polyamide matrix.
In this work, tannic acid (TA)-functionalized carbon nanotubes (CNT@TA) were synthesized by hydrogen bond and p-p stacking interactions. CNT@TA embedded with silver nanoparticles (Ag-CNT@TA) was obtained by in situ reducing silver ammonia ions in the pore channels of CNT@TA. CNT@TA and Ag-CNT@TA were added into the polyamide (PA) layer by interfacial polymerization to fabricate high-performance nanocomposite reverse osmosis membranes. The results show that the functionalized CNTs can be uniformly distributed in the PA matrix with random orientations. A loose PA separation layer was obtained by introducing CNT@TA. Correspondingly, abundant new water channels were formed. Compared with the pure PA membrane, the water permeability (4.81 L m(-2) h(-1) bar(-1)) of the nanocomposite membrane is enhanced by 49.8% without any loss in NaCl rejection (99.3%). The membrane exhibits satisfactory chemical- and bio-fouling resistances to bovine serum albumin and Escherichia coli as model foulants. The high bactericidal rate should be ascribed to the formation of the TA coating and confined Ag nanoparticles in CNT channels. The confined structure effectively avoids the leaching out of the Ag nanoparticles and keeps the persistence of the antibacterial property. The excellent compatibility between the CNTs and the polyamide matrix endows the membrane with long-term performance stability.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available