Cross-linked PAN-based thin-film composite membranes for non-aqueous nanofiltration

Pérez-Manríquez, Liliana; Aburabie, Jamaliah; Neelakanda, Pradeep; Peinemann, Klaus‐Viktor

doi:10.1016/j.reactfunctpolym.2014.09.015

Cited by 100 publications

(55 citation statements)

References 26 publications

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“…The dried membranes were fractured and flexed into short samples after being immersed in liquid nitrogen for 60 s. The handled membranes were sputter‐coated with nanogold to produce electrical conductivity. Fourier transform infrared spectroscopy (FTIR) was conducted to characterize the surface chemical structure compositions of the initial/modified/immobilized membranes . FTIR spectra were recorded using an attenuated total reflectance technique with a spectrometer in the range of 4000 ∼ 400 cm −1 .…”

Section: Methodsmentioning

confidence: 99%

Immobilization of horseradish peroxidase on modified PAN‐based membranes for the removal of phenol from buffer solutions

Wang

Liu

Zheng³

et al. 2016

Can J Chem Eng

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Polyacrylonitrile ultrafiltration membranes have been widely used in many separation processes. In this paper, horseradish peroxidase was immobilized onto polyacrylonitrile ultrafiltration membrane by crosslinking with glutaraldehyde. The immobilized enzyme possessed a protein loading of 0.025 mg/cm2membrane and a specific activity of 105 U/mgprotein (105 μmol/min/mgprotein). The initial modified and immobilized membranes were observed using SEM and FTIR. Potential applications of HRP membranes were investigated in the removal of phenol through oxidation with the addition of hydrogen peroxide. The optimum pH of the immobilized enzyme was determined to be 6.0, and the optimum hydrogen peroxide concentration to be 30 mmol/L. Almost 100 % removal of phenol (1 ∼ 10 mg/L) from water was achieved by HRP membranes. For high concentrated solutions, successive cycles were successfully used to improve the degree of phenol oxidation. Furthermore, the immobilized horseradish peroxidase was operationally stable. These results suggest that the HRP membrane has promising applications for the removal of phenol.

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Section: Methodsmentioning

confidence: 99%

Immobilization of horseradish peroxidase on modified PAN‐based membranes for the removal of phenol from buffer solutions

Wang

Liu

Zheng³

et al. 2016

Can J Chem Eng

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“…Polymeric membranes demonstrate potential advantages over inorganic membranes because of their low fabrication cost. To date, there are numerous reports presenting the use of polymeric membranes as a separation barrier for OSN applications . However, polymeric membranes often undergo flux decline over time due to either polymer chain compaction or swelling of the polymer matrix upon the exposure to the organic solvents .…”

Section: Introductionmentioning

confidence: 99%

Silane‐Crosslinked Asymmetric Polythiosemicarbazide Membranes for Organic Solvent Nanofiltration

Aburabie

Emwas

Peinemann

2018

Macro Materials & Eng

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Crosslinked polythiosemicarbazide (PTSC) membranes with a positively charged surface are fabricated via a reaction with (3‐glycidyloxypropyl)trimethoxysilane. The integrally asymmetric ultrafiltration membranes discussed here can be easily prepared by water‐induced phase separation using a PTSC solution in dimethylsulfoxide (DMSO). The crosslinked PTSC membranes are stable in DMSO, N,N‐dimethylformamide, and tetrahydrofuran and they reject molecules of molecular weights (MW) above 1300 g mol−1. The influence of the crosslinking agent on the surface charge, membrane solvent resistance, and membrane performance is discussed. The crosslinked asymmetric PTSC membranes totally reject Direct Red dye (MW 1373 g mol−1), while the pristine PTSC membrane does not show any rejection for this dye. This finding suggests that an inorganic‐type‐network is formed during the crosslinking reaction, which tunes the pore size of the prepared membranes.

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“…Most commercial nanofiltration membranes are produced by interfacial polymerization (IP), where a thin layer is formed rapidly on top of a porous support at the interface of an organic and aqueous phase. Since these membranes exhibit high water permeation and salt rejection they are widely used for aqueous systems but their applications toward organic solvents are quite limited, because the common porous supports (e.g., polysulfone) are not solvent resistant …”

Section: Introductionmentioning

confidence: 99%

“…Compared to other polymer materials, PAN is a low‐cost polymer which also has good resistance against chlorine, but it is unstable in certain classes of solvents, such as aprotic solvents like dimethylformamide (DMF), which is a common solvent for this polymer. The use of neat PAN as a substrate layer for making thin film composite (TFC) membranes by IP technique has been developed earlier and their performances were tested with several solvents except DMF, until our group recently reported a cross‐linked PAN (CL PAN) thin film composite membrane with excellent solvent stability in DMF …”

Section: Introductionmentioning

confidence: 99%

“…Since these membranes exhibit high water permeation and salt rejection they are widely used for aqueous systems but their applications toward organic solvents are quite limited, because the common porous supports (e.g., polysulfone) are not solvent resistant. [4] Polyacrylonitrile (PAN) membranes are well known for their solvent resistance and low fouling character for aqueous filtrations due to their hydrophilic nature. [5] Compared to other polymer materials, PAN is a low-cost polymer which also has good resistance against chlorine, [6] but it is unstable in certain classes of solvents, such as aprotic solvents like dimethylformamide (DMF), which is a common solvent for this polymer.…”

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confidence: 99%

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Sub‐6 nm Thin Cross‐Linked Dopamine Films with High Pressure Stability for Organic Solvent Nanofiltration

Pérez-Manríquez

Behzad

Peinemann

2016

Macro Materials & Eng

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Interfacial polymerization of dopamine and terephtaloyl chloride is performed on a porous crosslinked polyacrylonitrile support membrane. The resulting polymer layer has a smooth surface and is ultrathin (about 5 nm). The chemical nature of the interfacially polymerized layer is characterized by Fourier transform infrared spectroscopy and by X‐ray photoelectron spectroscopy. The thin‐film composite membrane is stable in aggressive solvents like dimethylformamide (DMF) and the membrane shows high solvent permeances combined with a molecular weight cut‐off below 800 g mol‐1. The remarkable stability in DMF, the ease of preparation as well as the extremely thin and smooth selective layer make this new type of bioinspired membrane attractive for solvent resistant nanofiltration.

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Cross-linked PAN-based thin-film composite membranes for non-aqueous nanofiltration

Cited by 100 publications

References 26 publications

Immobilization of horseradish peroxidase on modified PAN‐based membranes for the removal of phenol from buffer solutions

Immobilization of horseradish peroxidase on modified PAN‐based membranes for the removal of phenol from buffer solutions

Silane‐Crosslinked Asymmetric Polythiosemicarbazide Membranes for Organic Solvent Nanofiltration

Sub‐6 nm Thin Cross‐Linked Dopamine Films with High Pressure Stability for Organic Solvent Nanofiltration

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