An effective approach to fabrication of antifouling ultrafiltration membrane based on zwitterionic polyimide

Liu, Yang; Ai, Yuping; Huo, Pengfei; Huang, Hai; Gu, Jiyou

doi:10.1177/0954008316667787

Cited by 8 publications

(3 citation statements)

References 36 publications

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“…where C p and C f denote the concentration of the permeation and the feed, respectively. Then, the membrane was washed by distilled water for 20 min and the BSA solution was transformed to pure water to measure for another 1 h. For better assessment of the antifouling ability of the membranes, many parameters, such as flux recovery ratio (FRR), total fouling ratio (R t ), reversible fouling ratio (R r ), and irreversible fouling ratio (R ir ), were used as follows: 31 FRRð%Þ ¼ J w;2 J w;1 Â 100 ð5Þ…”

Section: Membrane Characterizationmentioning

confidence: 99%

Fabrication of high-performance ultrafiltration membranes using zwitterionic carbon nanotubes and polyethersulfone

Zhu

Wang

2017

High Performance Polymers

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Novel and functionalized multiwalled carbon nanotubes (MWCNTs) were successfully synthesized using zwitterionic structure, consisting of quaternary amine and sulfonic acid groups. The zwitterionic MWCNTs were introduced into a polyethersulfone (PES) matrix to prepare ultrafiltration membranes, via the phase inversion method. The acidfunctionalized MWCNTs were then mixed with the membrane matrix as reference. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy validated the introduction of quaternary amine and sulfonic acid groups into the MWCNTs. For example, the hydrophilicity of the composite membranes, especially of zwitterionic MWCNTs/ PES composite membranes, was obviously improved, as compared with that of the pristine PES membrane. Also, the morphologies of the membranes were studied by field emission scanning electron microscopy (FESEM) and their permeability and antifouling properties were thoroughly investigated. The results show that the water flux of the composite membrane, containing 0.2 wt% of zwitterionic MWCNTs, was twice more than that of the pure PES membrane, and its flux recovery ratio was as high as 85%.

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Section: Membrane Characterizationmentioning

confidence: 99%

Fabrication of high-performance ultrafiltration membranes using zwitterionic carbon nanotubes and polyethersulfone

Zhu

Wang

2017

High Performance Polymers

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“…Peaks corresponding to PSF are seen here. Apart from these peaks, three more new peaks appeared at 3630 cm −1 , 3421 cm −1 and 1669 cm −1 corresponding to N−H, O−H and NH 3 + CO 2 − stretching [29] . Thus, the FT‐IR spectrum confirmed the formation of ionic structure (zwitter ionic structure) during the simultaneous grafting of CEA and CAA in the presence of AlCl 3 catalyst.…”

Section: Resultsmentioning

confidence: 69%

Synthesis and Characterization of Zwitter ion Functionalized Polysulfone Membrane

et al. 2022

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The main target of the present research work is synthesis of structurally modified polysulfone (PSF) membrane with good anti‐fouling property. Fouling is a big problem in polymeric membrane field. This can be reduced by introducing the zwitter ionic structure on the polymeric backbone. In this research work, anti‐fouling of PSF membrane was taken as s challenge and successfully done via Friedel‐Crafts (FC) alkylation reaction. For the sake of comparison, the FC alkylation reaction of chloroethylamine (CEA) and chloroaceticacid (CAA) onto PSF backbone was done in a single step and two step reactions in the presence of AlCl3 as a catalyst. The structurally modified PSF was characterized by FT‐IR spectrum, 1H‐NMR spectrum, XPS, EDX, SEM, DSC, TGA, WCA and POM. The porosity and antimicrobial properties of simultaneously acid and amine functionalized PSF membrane was tested. The single step reaction exhibited a peak in the FT‐IR spectrum at 1669 cm−1 corresponding to the zwitter ionic structure. The same peak was absent in the two step reaction. The PSF4 system showed the lowest WCA of 32.4° and confirmed the increase in hydrophilicity of the membrane material. The thermal stability of the PSF before and after the structural modification reaction was internally analyzed and compared with the literature values.

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“…1 Moreover, they are characterized by low dielectric constants, low thermal expansion, light weight, good flexibility, facile preparation of films, and high radiation resistance. 2 Accordingly, they have been widely utilized in the electric, 3 photonics, 4,5 electro-optical, 6 gas and chemical separation membrane, [7][8][9] proton exchange membranes, 10 porous films, 11 and aerospace industries. 12 However, it is well known that wholly aromatic PIs are insoluble in most organic solvents due to the rigidity of their backbone and formation of a charge transfer complex between the dianhydride and diamine (DA) groups which greatly limits their application.…”

Section: Introductionmentioning

confidence: 99%

Novel polyimides based on diamine containing thiazole units with thioether linkage and pyridine as pendent group

Rezania

Shockravi

Ehsani

et al. 2017

High Performance Polymers

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Three new organic-soluble polyimides (PIs) bearing flexible thioether linkages, thiazole, and pyridine ring units were synthesized from a novel thioether-bridged diamine monomer and commercially available aromatic dianhydrides (1–3) via chemical imidization method. The resulting polymers were obtained in high yields and possessed inherent viscosities in the range of 0.67–0.89. The PIs are characterized by Fourier-transform infrared (FTIR), nuclear magnetic resonance (NMR), differential scanning calorimetry, and thermogravimetric analysis (TGA). All of the PIs exhibited excellent solubility in polar solvent. The polymers showed good thermal stability with glass transition temperatures ( Tgs) in the range of 194–244°C, and decomposition temperatures ( T5%) exceeding 300°C were observed using TGA in nitrogen atmosphere for the current polymers.

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An effective approach to fabrication of antifouling ultrafiltration membrane based on zwitterionic polyimide

Cited by 8 publications

References 36 publications

Fabrication of high-performance ultrafiltration membranes using zwitterionic carbon nanotubes and polyethersulfone

Fabrication of high-performance ultrafiltration membranes using zwitterionic carbon nanotubes and polyethersulfone

Synthesis and Characterization of Zwitter ion Functionalized Polysulfone Membrane

Novel polyimides based on diamine containing thiazole units with thioether linkage and pyridine as pendent group

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