Influence of blending zwitterionic functionalized titanium nanotubes on flux and anti-fouling performance of polyamide nanofiltration membranes

Wang, Chongbin; Li, Zhiyuan; Chen, Jianxin; Zhong, Yunlong; Ren, Lei; Pu, Yunping; Dong, Zhipeng; Wu, Hong

doi:10.1007/s10853-018-2288-2

Cited by 19 publications

(7 citation statements)

References 41 publications

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“…This suggests a strong PA66 surface oxidation. The N1s region deconvolution resulted in two peaks at 399.7 and 401.6 eV, which are attributed to N-C and N-H, respectively ( Figure S3 in Supplementary Materials) [51,52]. The Ag3d XPS spectra of PA66 samples were performed to further identify the oxidation states of AgNPs in the different tested conditions.…”

Section: Xpsmentioning

confidence: 99%

Effect of Dispersion Solvent on the Deposition of PVP-Silver Nanoparticles onto DBD Plasma-Treated Polyamide 6,6 Fabric and Its Antimicrobial Efficiency

et al. 2020

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Polyvinylpyrrolidone-coated silver nanoparticles (PVP-AgNPs) dispersed in ethanol, water and water/alginate were used to functionalize untreated and dielectric barrier discharge (DBD) plasma-treated polyamide 6,6 fabric (PA66). The PVP-AgNPs dispersions were deposited onto PA66 by spray and exhaustion methods. The exhaustion method showed a higher amount of deposited AgNPs. Water and water-alginate dispersions presented similar results. Ethanol amphiphilic character showed more affinity to AgNPs and PA66 fabric, allowing better uniform surface distribution of nanoparticles. Antimicrobial effect in E. coli showed good results in all the samples obtained by exhaustion method but using spray method only the DBD plasma treated samples displayed antimicrobial activity (log reduction of 5). Despite the better distribution achieved using ethanol as a solvent, water dispersion samples with DBD plasma treatment displayed better antimicrobial activity against S. aureus bacteria in both exhaustion (log reduction of 1.9) and spray (methods log reduction of 1.6) due to the different oxidation states of PA66 surface interacting with PVP-AgNPs, as demonstrated by X-ray Photoelectron Spectroscopy (XPS) analysis. Spray method using the water-suspended PVP-AgNPs onto DBD plasma-treated samples is much faster, less agglomerating and uses 10 times less PVP-AgNPs dispersion than the exhaustion method to obtain an antimicrobial effect in both S. aureus and E. coli.

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Section: Xpsmentioning

confidence: 99%

Effect of Dispersion Solvent on the Deposition of PVP-Silver Nanoparticles onto DBD Plasma-Treated Polyamide 6,6 Fabric and Its Antimicrobial Efficiency

et al. 2020

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“…More importantly, such high Na 2 SO 4 rejection could be maintained all the time when the feed concentration increased from 1000 to 6000 ppm (Figure S10), demonstrating the stability of the membrane rejection ability. This separation performance is distinctly superior to that of most commercially available or laboratory-made polyamide membranes based on a conventional process, even including the ones prepared with the assistance of costly nanomaterials (Figure d). − In terms of the trade-off relationship between water permeability and water/Na 2 SO 4 permselectivity, the PIP-0.3-60 membrane clearly overcame the upper bound of the performance for the conventional polyamide TFC membranes (Supporting Information, Section S11). The superiority of the PIP-0.3-60 membrane originated from the merits of the novel fabrication procedure and the resultant favorable membrane properties.…”

Section: Resultsmentioning

confidence: 95%

“…(c) Rejections of four types of salts by the membranes prepared based on various PIP contents and 60 s of precipitation. (d) Comparisons of water permeability and Na 2 SO 4 rejection between the PIP-0.3-60 membrane and other reported polypiperazine-amide membranes including laboratory-made conventional TFC membranes, − thin-film nanocomposite (TFN) membranes, − and commercially available TFC membranes. − …”

Section: Resultsmentioning

confidence: 99%

A Facile and Scalable Fabrication Procedure for Thin-Film Composite Membranes: Integration of Phase Inversion and Interfacial Polymerization

Liu

Zhu

Zheng

et al. 2020

Environ. Sci. Technol.

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Conventional dense thin-film composite (TFC) membranes evince a universally low water permeability, the increase of which typically relies on introducing additional transport channels based on intricate steps within a membrane preparation process. In this study, we reported a novel and simplified procedure for the fabrication of high-performance TFC membranes. Specifically, the dissolution of aqueous monomers in the casting solution was utilized for the following interfacial polymerization (IP). Since the monomers diffused to the water bath during phase inversion, the control of precipitation time enabled an effective regulation of the monomer concentration in the formed polymeric substrates, where the IP reaction was initiated by the addition of the organic phase. The entire and uniform embedment of aqueous monomers inside the substrates contributed to the formation of ultrathin and smooth selective layers. An excellent separation performance (i.e., water permeability: 34.7 L m–2 h–1 bar–1; Na2SO4 rejection: ∼96%) could be attained using two types of aqueous monomers (i.e., piperazine and β-cyclodextrin), demonstrating the effectiveness and universality of this method. Compared to the conventional immersion-based process, this novel procedure shows distinct advantages in reducing monomer usage, shortening the production cycle, and achieving a more superior membrane performance, which is highly promising for large-scale membrane manufacture.

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“…However, after DBD plasma-treatment, this peak decreased and the other oxygen peaks increased, suggesting a strong PA66 surface oxidation. The N1s region deconvolution, in control samples presented two peaks at 399.8 and 401.4 eV, attributed to N-C and N-H, respectively [18][19][20]. The composites with chitosan presented an extra peak at 400.4 eV corresponding to amine groups of chitosan [21].…”

Section: Xpsmentioning

confidence: 96%

DBD Plasma treatment and chitosan layers - A green method for stabilization of silver nanoparticles on polyamide 6,6

Ribeiro

Modić

Cvelbar

et al. 2020

Proceedings of the First International Conference on “Green” Polymer Materials 2020

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The addition of silver nanoparticles (AgNPs) to biomedical textiles can be of great interest to protect the materials against microorganisms and prevent their spread. However, the human and environmental over-exposure to AgNPs is leading to numerous concerns due to their toxicity. In this work, AgNPs were stabilized onto polyamide 6.6 fabrics (PA66) through atmospheric dielectric barrier discharge (DBD) plasma treatment and the use of chitosan (Ch) layers applied by spray. DBD plasma treatment revealed a crucial role in AgNPs adhesion (4.8 and 6.3 At%). A first layer of Ch decreased the AgNPs adhesion in both untreated and DBD plasma-treated samples but treated samples show higher concentration (1.7 and 4.1 At%). The antibacterial activity was evaluated against Staphylococcus aureus and Escherichia coli after 2 and 24 h, showing a superior action in all samples with DBD plasma treatment after 24 h. The Ch in the first layers of the composites delayed the antimicrobial action of the samples but it also may enhance antimicrobial action. The obtained coatings will allow the development of novel and safe wound dressings with improved AgNPs deposition, controlled ions released and consequently, manage the antimicrobial performance and minimize the AgNPs side effects.

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Influence of blending zwitterionic functionalized titanium nanotubes on flux and anti-fouling performance of polyamide nanofiltration membranes

Cited by 19 publications

References 41 publications

Effect of Dispersion Solvent on the Deposition of PVP-Silver Nanoparticles onto DBD Plasma-Treated Polyamide 6,6 Fabric and Its Antimicrobial Efficiency

Effect of Dispersion Solvent on the Deposition of PVP-Silver Nanoparticles onto DBD Plasma-Treated Polyamide 6,6 Fabric and Its Antimicrobial Efficiency

A Facile and Scalable Fabrication Procedure for Thin-Film Composite Membranes: Integration of Phase Inversion and Interfacial Polymerization

DBD Plasma treatment and chitosan layers - A green method for stabilization of silver nanoparticles on polyamide 6,6

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