Improved antifouling performance of ultrafiltration membrane via preparing novel zwitterionic polyimide

Huang, Hai; Yu, Jiayu; Guo, Hanxiang; Shen, Yibo; Yang, Fan; Wang, Han; Liu, Rong; Liu, Yang

doi:10.1016/j.apsusc.2017.08.004

Cited by 66 publications

(34 citation statements)

References 42 publications

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“…This single-layered morphology is favorable for the investigation of the influence of particles in the membrane structure. When the concentration of MoS 2 @PDA was 2.0 wt %, the presence of hydrophilic MoS 2 @PDA in the casting solution accelerated the solvent–nonsolvent exchange and instantaneous liquid–liquid separation in the casting solution, resulting in the formation of the microvoids structures observed in the M1 membrane [ 49 ]. However, the number of macropores was reduced at a higher additive concentration, and the internal structure was more compact, as shown in the cross-section of membranes M3 and M5.…”

Section: Resultsmentioning

confidence: 99%

Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Tian

2021

Membranes

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Tight ultrafiltration (TUF) membranes with high performance have attracted more and more attention in the separation of organic molecules. To improve membrane performance, some methods such as interface polymerization have been applied. However, these approaches have complex operation procedures. In this study, a polydopamine (PDA) modified MoS2 (MoS2@PDA) blending polyethersulfone (PES) membrane with smaller pore size and excellent selectivity was fabricated by a simple phase inversion method. The molecular weight cut-off (MWCO) of as-prepared MoS2@PDA mixed matrix membranes (MMMs) changes, and the effective separation of dye molecules in MoS2@PDA MMMs with different concentrations were obtained. The addition amount of MoS2@PDA increased from 0 to 4.5 wt %, resulting in a series of membranes with the MWCO values of 7402.29, 7007.89, 5803.58, 5589.50, 6632.77, and 6664.55 Da. The MWCO of the membrane M3 (3.0 wt %) was the lowest, the pore size was defined as 2.62 nm, and the pure water flux was 42.0 L m−2 h−1 bar−1. The rejection of Chromotrope 2B (C2B), Reactive Blue 4 (RB4), and Janus Green B (JGB) in aqueous solution with different concentrations of dyes was better than that of unmodified membrane. The separation effect of M3 and M0 on JGB at different pH values was also investigated. The rejection rate of M3 to JGB was higher than M0 at different pH ranges from 3 to 11. The rejection of M3 was 98.17–99.88%. When pH was 11, the rejection of membranes decreased with the extension of separation time. Specifically, at 180 min, the rejection of M0 and M3 dropped to 77.59% and 88.61%, respectively. In addition, the membrane had a very low retention of salt ions, Nacl 1.58%, Na2SO4 10.52%, MgSO4 4.64%, and MgCl2 1.55%, reflecting the potential for separating salts and dyes of MoS2@PDA/PES MMMs.

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Section: Resultsmentioning

confidence: 99%

Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Tian

2021

Membranes

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“…As shown in Table-II, after backwashing process, 76-79% and 82-90% flux was recovered for 2-3 wt.% and 5-6 wt.% PVA respectively. High level of efficiency of the hydraulic cleaning and good fouling resistant ability are represented by higher value of RFR and lower value of IFR, otherwise its vice versa [20]. Based on the table, the increase concentration of PVA resulted in the increase in RFR and a decrease in IFR.…”

Section: Resultsmentioning

confidence: 95%

“…The rapid decline in the flux was attributed to the adsorption and deposition of the solute (mercury) molecules on the membrane or inside the pore surface of the membrane [19]. After 30 minutes, perhaps cakes layer of solutes were formed on the membrane surface where the flux remains consistent as no solute were able to go through the membrane [20]. This situation was represented by the result as shown in Table-I, where after 30 minutes of filtration time, membranes with 3 to 6 wt.% PVA resulted in fully removal of mercury ion from the feed solution.…”

Section: Resultsmentioning

confidence: 99%

Thin Film Composite Membrane from PSF/Chitosan/PEG: Effect of PVA Concentration on the Removal of Mercury and Antifouling Properties

Kassim Shaari*,

Fazrul Basri,

Yazid

et al. 2019

IJRTE

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In this study, a thin film composite membrane was synthesized by coating a layer of hybrid membrane formulated from a blend of polyethylene glycol (PEG), chitosan and polyvinyl alcohol (PVA), cross linked with tetraethylorthosilicate on a polysulfone support membrane. The aim of this experiment is to study the effect of varying the PVA concentrations on the performance of the TFC membranes on the removal of mercury and to determine their antifouling behaviour. Four different concentrations of PVA were selected; 2 wt.%, 3 wt.%, 5 wt.% and 6 wt.%. Results showed that the increase concentration of PVA leads to good removal of mercury ions, and good antifouling properties which was portrayed through high FRR and RFR respectively, and low IFR. The suitable concentration of PVA was found at 3 wt. %, where it has yield TFC membrane that able to remove all the mercury ions from the solution even after 30 minutes filtration time with sufficient amount of flux as compared to other membranes. It also portrays good anti fouling behaviour due to low IFR and average value of RFR (66%). Therefore, this study concludes that the fabricated thin film composite membrane suitable to be used in membrane filtration for heavy metal removal.

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“…This means in the case of Ag-ZnO/PA-TFC membrane foulants were only loosely adsorbed at the membrane surface [60,61]. When surface hydrophilicity is high as in the case of modified membrane, the membrane is capable of forming stable hydration layer of hydrogen bonding with water molecules to keep away the organic foulants from being adsorbed on the membrane surface [62,63].…”

Section: Resultsmentioning

confidence: 99%

Antifouling Properties of Silver-Zinc Oxide Polyamide Thin Film Composite Membrane and Rejection of 2-Chlorophenol and 2,4-Dichlorophenol

et al. 2019

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The silver-zinc oxide (Ag-ZnO) polyamide thin film composite (PA-TFC) membrane was prepared by interfacial polymerization. The Ag-ZnO/PA-TFC membrane was characterized by attenuated total reflectance fourier-transform infrared spectroscopy (ATR-FTIR) for polyamide functional groups and contact angle for surface hydrophilicity. The Ag-ZnO/PA-TFC membrane was further characterized by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) for morphology and surface roughness, respectively. The performance of the fabricated membrane was investigated using pure water flux, permeability, rejection, flux recovery, and fouling resistance using low molecular weight organic pollutants, 2-chlorophenol (2-CP) and 2,4-dichlorophenol (2,4-DCP). The results were compared to the neat (PA-TFC) membrane. It was observed that incorporation of Ag-ZnO nanocomposites into the PA-TFC membrane improved hydrophilicity, permeation, rejection, and fouling resistance properties of the membrane. The contact angle decreased from 62.8° to 54° for PA-TFC and the Ag-ZnO/PA-TFC membrane, respectively. The presence of Ag-ZnO enhanced permeability of the membrane from 0.9 (Lm−2h−1bar−1) to 1.9 (Lm−2h−1bar−1). Modification of the membrane with Ag-ZnO further showed an enhanced rejection of 2-CP and 2,4-DCP from 43% to 80% and 58% to 85%, respectively. The 2,4-DCP molecules were rejected more than 2-CP due to enhanced repulsive forces from the extra Cl ion. A high flux recovery of about 95% was achieved for the modified membrane compared to 64% for the neat membrane. The improved flux recovery was an indication of enhanced antifouling propensity.

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Improved antifouling performance of ultrafiltration membrane via preparing novel zwitterionic polyimide

Cited by 66 publications

References 42 publications

Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Polydopamine-Assisted Two-Dimensional Molybdenum Disulfide (MoS2)-Modified PES Tight Ultrafiltration Mixed-Matrix Membranes: Enhanced Dye Separation Performance

Thin Film Composite Membrane from PSF/Chitosan/PEG: Effect of PVA Concentration on the Removal of Mercury and Antifouling Properties

Antifouling Properties of Silver-Zinc Oxide Polyamide Thin Film Composite Membrane and Rejection of 2-Chlorophenol and 2,4-Dichlorophenol

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