Cross-linked polyacrylonitrile/polyethyleneimine–polydimethylsiloxane composite membrane for solvent resistant nanofiltration

Zhang, Haoqin; Zhang, Yujing; Li, Lingbo; Zhao, Shangmei; Ni, Heli; Cao, Shaokui; Wang, Jingtao

doi:10.1016/j.ces.2013.11.043

Cited by 53 publications

(24 citation statements)

References 41 publications

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“…Crosslinking of the Ultem 1000 support led to a slight decrease in the measured pore size, but the membrane remained exible in the dry state and both membranes exhibited good mechanical properties. The PAN support was characterised with a tensile strength of 50±2 MPa in the Machine Direction with an elongation at break of 19±1%, in line to those reported elsewhere for a PAN support membrane 15. The x-UT support was characterised with a tensile strength of 38±5 MPa in the Machine Direction with an elongation at break of 15±2%.…”

supporting

confidence: 82%

Solvent-Free Coating of Epoxysilicones for the Fabrication of Composite Membranes

Cook

Peeva

Livingston

2018

Ind. Eng. Chem. Res.

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Solventless coated epoxysilicone composite membranes have been prepared from a UV curable epoxysilicone polymer for organic solvent nanoltration. Coatings were conducted solventless on a roll-to-roll pilot line using a forward gravure coating technique, and applied on a polyacrylonitrile or crosslinked polyetherimide support. Crosslinking of the polyetherimide support membrane with propanediamine enhanced the adhesion properties of the epoxysilicone selective layer. Penetration of the coating solution into the porous support membrane was conrmed using SEM-EDS. Membranes fabricated using two dierent gravure heads have been studied, with sub micron siloxane layer thicknesses achieved. The separation performance of the membranes is observed to be independent of the thickness. It has been possible to achieve membranes with MWCO < 500 g mol −1 in hydrocarbon solvents. Benets of the fabrication include the ability to UV crosslink under air, elimination of solvent based coating, and the feasibility of achieving uniform, sub micron coatings at large scale manufacturing. These membranes comprise a further step towards greener and safer membrane production.

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supporting

confidence: 82%

Solvent-Free Coating of Epoxysilicones for the Fabrication of Composite Membranes

Cook

Peeva

Livingston

2018

Ind. Eng. Chem. Res.

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“…The weight of the membrane was determined again soon after the solvent was removed from the membrane. The degree of swelling (%) was calculated by the following equation [26]:…”

Section: Dcmd Experimentsmentioning

confidence: 99%

Dye wastewater treatment by direct contact membrane distillation using polyvinylidene fluoride hollow fiber membranes

Mokhtar

Lau

Ismail

2014

Journal of Polymer Engineering

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The potential of 18 wt.% polyvinylidene fluoride (PVDF) hollow fiber membrane blended with ethylene glycol (EG) for the treatment of dye solution using direct contact membrane distillation (DCMD) system was investigated. The PVDF membrane was prepared using the dryjet wet spinning method and was characterized in terms of membrane morphology, porosity, wetting pressure, gas permeability and degree of hydrophobicity. The membrane was tested using dye solution containing 0.5 g l -1 reactive black 5 (RB5). The experimental period was prolonged to 6 h in order to analyze the fouling tendency and membrane durability during the DCMD process. The results showed that the modified PVDF membrane was able to produce consistent flux (i.e., 9.82 ± 0.52 kg m -2 h -1 ) throughout the DCMD experiment while maintaining excellent dye rejection (i.e., 99.86 ± 0.04%). With respect to membrane fouling, it was found that the lumen side of the membrane was significantly stained with color (compared to outer membrane surface) due to the physical-chemical interaction between reactive dye and membrane structure. Although membrane fouling was experienced in this study, its impact on MD performance in terms of flux and rejection was negligible, mainly because MD is not a pressure-driven process.

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“…The molecular weight cut-off (MWCO) remained approximately 235 g mol -1 but the obtained permeance was still very low (0.3 L m -2 h -1 bar -1 ). Zhang et al [9] recently reported a crosslinked polyacrylonitrile/polyethyleneimine-polydimethylsiloxane TFC membrane, which showed low swelling property of approx. 3% but this was somewhat offset by the high MWCO (600 g mol -1 ) and low permeance of 0.4 L m -2 h -1 bar -1 .…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic thin film composite nanofiltration membranes derived solely from sustainable sources

et al. 2021

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Cross-linked polyacrylonitrile/polyethyleneimine–polydimethylsiloxane composite membrane for solvent resistant nanofiltration

Cited by 53 publications

References 41 publications

Solvent-Free Coating of Epoxysilicones for the Fabrication of Composite Membranes

Solvent-Free Coating of Epoxysilicones for the Fabrication of Composite Membranes

Dye wastewater treatment by direct contact membrane distillation using polyvinylidene fluoride hollow fiber membranes

Hydrophobic thin film composite nanofiltration membranes derived solely from sustainable sources

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