Self-cleaning anti-fouling hybrid ultrafiltration membranes via side chain grafting of poly(aryl ether sulfone) and titanium dioxide

Geng, Zhi; Yang, Xue; Boo, Chanhee; Zhu, Suiyi; Lü, Ying; Wang, Fan; Huo, Mingxin; Elimelech, Menachem; Xia, Yang

doi:10.1016/j.memsci.2017.01.043

Cited by 105 publications

(60 citation statements)

References 55 publications

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“…Most methods deposit TiO 2 nanoparticles in a separate process on the membrane [23][24][25][26][27][28] or embed it directly in the membrane casting solution [29][30][31][32][33][34][35][36]. Disadvantages of the mentioned methods are aggregation of nanoparticles [9,26,28,37] and high sealing of nanoparticles in the bulk of the membrane polymer [9,23], respectively. The direct synthesis of TiO 2 nanoparticles on a membrane via hydrolysis of titanium alkoxides leads to finely-and evenly-distributed nanoparticles [9,37].…”

Section: Of 14mentioning

confidence: 99%

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

et al. 2017

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Removing pollutants from water by using the photocatalyst TiO 2 is a highly-promising method. A large amount of work has been done to increase the activity of TiO 2 , whereas the main two findings are increasing the surface area and applying mixed phase modifications (anatase, brookite, and rutile). Here, we present a method to directly synthesize non-agglomerated TiO 2 nanoparticles with different crystal phase ratios via low temperature dissolution-precipitation (LTDRP) on a porous microfiltration membrane (polyethersulfone). The amount of hydrochloric acid and the temperature was varied between 0.1-1 M and 25-130 • C, respectively, while the concentration of titanium precursor (titanium(IV) isopropoxide) was kept unchanged. The TiO 2 nanoparticles and the membrane were thoroughly characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), measuring the water contact angle and permeation flux, and examining the degradation of methylene blue. The mixed phase anatase/brookite with a main component being anatase exhibited the highest photocatalytic activity in removing methylene blue. Higher synthesis temperature induces enhanced crystallinity and, subsequently, the degradation rate of methylene blue was improved. Additionally, the photocatalytic activity remains high and unchanged for up to nine repeated cycles, i.e., full recovery of the photocatalytic properties is sustained.

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Section: Of 14mentioning

confidence: 99%

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

et al. 2017

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“…Recently, great attention is paid to superhydrophobic polymers due to their diverse potential . These functionalized materials have been used in many applications including oil–water separation, self‐cleaning, anticorrosion, and so forth. The inspiration of superhydrophobic surfaces originates from natural surfaces such as lotus leaves, duck feathers, and insect cuticles .…”

Section: Introductionmentioning

confidence: 99%

Preparation of hierarchically structured PCL superhydrophobic membrane via alternate electrospinning/electrospraying techniques

Zhang

Wang

Zhang

et al. 2019

J Polym Sci B Polym Phys

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Superhydrophobic polycaprolactone (PCL) membranes with hierarchical structure were fabricated via alternate electrospinning/electrospraying techniques. Electrospun PCL/methyl silicone oil (PCL/MSO) nanofibers were employed as substrate. PCL/MSO‐PCL microspheres (PCL/MSO‐PCLMS) hierarchical membrane was prepared via electrosprayed PCLMS as an additional layer on the substrate. Field emission scanning electron microscopy images showed the formation of hierarchical PCL/MSO‐PCLMS membranes. Compared to pure PCL fibers substrate (120 ± 1.3°), the water contact angle (WCA) of MSO‐modified PCL membrane was 142 ± 0.7°. The most interesting observation was that the WCA of PCLMS without any modification could be achieved to 146 ± 2.8°. On this basis, PCL/MSO‐PCLMS hierarchical membrane possessed superhydrophobic surface with 150 ± 0.6° of WCA. The excellent surface roughness and air‐pocket capacity of hierarchical membranes would make the membranes more hydrophobic. The maximum oil (n‐hexane) adsorption capacity of PCL/MSO‐PCLMS membrane was 32.53 g g−1. Oil–water separation efficiencies of the superhydrophobic membranes were all higher than 99.93% after 10 cycles. The hierarchically structured PCL superhydrophobic membranes indicate the potential applications of environmentally friendly biopolymers as separation membranes. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2019, 57, 421–430

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“…Fabrication of PAES-COOH/PVPON composites PAES-COOH was synthesized through the condensation polymerization of DFPS, HFBA, and PPL with a molar ratio of 10∶9∶1 in TMS at 125-175°C ( Figure 1a). 39 The structure of PAES-COOH was confirmed with 1 H NMR and 13 C NMR (Supporting Information Figure S1). M n of PAES-COOH is ∼7.2 × 10 4 g/mol, as measured by gel permeation chromatography (GPC).…”

Section: Resultsmentioning

confidence: 92%

Polymeric Complex Nanoparticles Enable the Fabrication of Mechanically Superstrong and Recyclable Poly(aryl ether sulfone)-based Polymer Composites

Luo

et al. 2020

CCS Chem.

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It is a long-term pursuit, and also, a challenge to significantly improve the mechanical strength of thermoplastic polymers using readily dispersed polymers as nanofillers. In this study, we demonstrated that in situ formed carboxylic acid-functionalized poly(aryl ether sulfone) (PAES-COOH)/polyvinylpyrrolidone (PVPON) complex nanoparticles can significantly enhance the mechanical strength of PAES-COOH by mixing PAES-COOH with a small fraction of PVPON. The PAES-COOH/PVPON 10% composite, which contained ∼10 wt % PVPON, exhibited a tensile strength of ∼104.8 MPa and Young's modulus of ∼932.2 MPa, which were ∼2.0 and ∼1.7 times higher than those of the PAES-COOH, respectively. The PAES-COOH/PVPON nanoparticles which were uniformly dispersed in PAES-COOH matrices and had strong hydrogen-bonding interactions with PAES-COOH, served as nanofillers to reinforce the mechanical strength of the PAES-COOH. The PAES-COOH/PVPON 10% composites possessed excellent solvent-assisted healability, and the fractured composites could be healed to restore their original mechanical strength. Meanwhile, the PAES-COOH/PVPON 10% composites could be recycled multiple times, and yet retained their shape integration and their original mechanical strength.

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Self-cleaning anti-fouling hybrid ultrafiltration membranes via side chain grafting of poly(aryl ether sulfone) and titanium dioxide

Cited by 105 publications

References 55 publications

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Low-Temperature Synthesis of Anatase/Rutile/Brookite TiO2 Nanoparticles on a Polymer Membrane for Photocatalysis

Preparation of hierarchically structured PCL superhydrophobic membrane via alternate electrospinning/electrospraying techniques

Polymeric Complex Nanoparticles Enable the Fabrication of Mechanically Superstrong and Recyclable Poly(aryl ether sulfone)-based Polymer Composites

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