Sustainable Antibiofouling Properties of Thin Film Composite Forward Osmosis Membrane with Rechargeable Silver Nanoparticles Loading

Abstract

Microbial attachment and biofilm formation on filtration membrane can greatly compromise its flux and separation efficiency. Here, a simple and facile approach has been developed to in situ generate silver nanoparticles (Ag NPs) on the thin film composite forward osmosis (TFC FO) membrane for sustainable antibiofouling performances. Mussel-inspired dopamine chemistry was applied to grow polydopamine coating on both surfaces of FO membranes, followed by the generation of Ag NPs upon a simple dip coating in silver nitrate aqueous solution. Furthermore, the Ag NPs deposited membranes had a long-term silver release profile with rechargability for multiple times upon their depletion, and exhibited strong sustainable bactericidal efficacy against Gram-negative bacteria and Grampositive bacteria. The Ag NPs had a controllable effect on the membrane performances including the water flux and reverse salt flux in the FO test mode. Our practicable antibacterial strategy may apply to other types of filtration membranes with diverse material surfaces and may pave a new way to achieve the sustainable membrane antibiofouling performance on a large scale.

Breaking the permeability–selectivity trade-off in thin-film composite polyamide membranes with a PEG-b-PSF-b-PEG block copolymer ultrafiltration membrane support through post-annealing treatment

“…The water flux and the salt reverse flux of the TFC FO membranes were measured using a laboratory-scale cross-flow FO system equipped with a flat-sheet membrane cell with a 38.52 cm 2 effective membrane area 23 . DI water (2 L) and a 2 L NaCl solution (0.5-2.0 M) were used as the feed and draw solutions, respectively.…”

Investigation on the UV spectra of the supermolecular system involving silver nanoparticles–substituted N‐(phenyl‐ethylene)‐anilines

“…They pointed out that the change of Raman spectra of organic compounds was caused by the hydrogen bond between oxaloacetamide and carboxyl groups. Francesko et al, [22] Liu and Hu, [23] and Miao et al [24] designed some kinds of functionalized AgNPs based on the change of Raman scattering spectra and redox potential. Francesko et al [22] selected 6-deoxy-6-(omega-aminoethyl)-amino cellulose (AC) to encapsulate AgNPs, where the amino (NH 2 ) could be oxidized by phenol of cork to form quinines.…”

“…The composite AgNPs have lasting antibacterial effect on Escherichia coli in water. Li and Hu [23] found what the AgNPs were deposited in permeable film coated with dopamine had strong germicidal efficacy against gram-positive bacteria and gramnegative. Miao et al [24] designed an AgNP functionalized by efficient melamine as an electrochemical sensor for probing dichloroamine.…”

Preparation and characterization of antifouling and antibacterial polysulfone ultrafiltration membranes incorporated with a silver–polydopamine nanohybrid

“…Some studies that have focused on the in situ immobilization of Ag nanoparticles on the PDA-modified membrane surface have been reported, and the obtained membranes showed effective antifouling and antibacterial properties. 27,32,33 However, the dense PDA coating may block the membrane surface pores and thus diminish the membrane permeability. [33][34][35][36][37] So, in this study, an Ag-PDA nanohybrid was used to achieve high-performance hybrid UF membranes for the first time to the best of our knowledge.…”

“…27,32,33 However, the dense PDA coating may block the membrane surface pores and thus diminish the membrane permeability. [33][34][35][36][37] So, in this study, an Ag-PDA nanohybrid was used to achieve high-performance hybrid UF membranes for the first time to the best of our knowledge. The hydrophilicity, water permeability, and organic fouling resistance of the hybrid membrane were expected to be greatly improved as a result of the addition of the Ag-PDA nanohybrid with its extreme high hydrophilicity.…”