Solvent dependent solute solubility governs retention in silicone based organic solvent nanofiltration

Postel, Stefanie; Schneider, Carole M.; Weßling, Matthias

doi:10.1016/j.memsci.2015.09.014

Cited by 33 publications

(16 citation statements)

References 33 publications

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“…(20 -25 µm), the Flory-Huggins interaction parameters, χ, that were obtained from the isotherm experiments were higher than those reported in the literature for the same solvent with more conventionally studied PDMS networks. 4,2325 When a thicker ECMS-924 lm was studied, Fig. 10c, the χ factor that was obtained from the numerical tting was in line with those reported elsewhere.…”

Section: Eect Of Coating Formulationsupporting

confidence: 86%

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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Section: Eect Of Coating Formulationsupporting

confidence: 86%

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

Cook

Peeva

Livingston

2018

Ind. Eng. Chem. Res.

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“…In this way, we expected that the affinity of selective layers towards the solvent/solute is controlled, aimed at enhancing the membrane stability and permeability. 7,[26][27][28] Fig . 5 depicts the contact angle of PDMS-PTFPMS/PVDF composite membranes using DI water as the test liquid.…”

Section: Resultsmentioning

confidence: 99%

Highly stable PDMS–PTFPMS/PVDF OSN membranes for hexane recovery during vegetable oil production

Chen

Cai

et al. 2017

RSC Adv.

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“…The regular solution theory has been proved to predict the swelling of polymers in organic solvents surprisingly well, although some assumptions are made in the prediction. [47][48][49] It was also used to predict the swelling of layered montmorillonite, 50 demonstrating the feasibility of describing the swelling of layer-stacked 2D nanomaterial using the solution theory. In order to develop a universal model to predict the swelling of GO in different solvents, we need to determine the solubility parameters of GO first.…”

Section: Understanding the Interlayer Spacing Of Go In Organic Solventsmentioning

confidence: 99%

Correlating Interlayer Spacing and Separation Capability of Graphene Oxide Membranes in Organic Solvents

Zheng

Wang

et al. 2020

ACS Nano

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Membranes synthesized by stacking two-dimensional (2D) graphene oxide (GO) hold great promises for improved permeability and separation capability in organic solvents. However, the separation capability of a layer-stacked GO membrane in organic solvents can be significantly affected by its swelling and interlayer spacing, which has not yet been systematically characterized. In this study, the interlayer spacing of a layer-stacked GO membrane in different organic solvents was experimentally characterized by liquid-phase ellipsometry. To understand the swelling mechanism, the solubility parameters of GO were experimentally determined and used to mathematically predict the Hansen solubility distance (Ra) between GO and solvents, which is found to be a good predictor for GO swelling and the interlayer spacing. Solvents with low solubility distance (e.g., dimethylformamide, n-methyl-2-pyrrolidone) tend to cause significant GO swelling, resulting in an interlayer spacing of up to 2.7 nm. Solvents with high solubility distance (above 10) such as ethanol, acetone, hexane and toluene only cause minor swelling and are thus able to maintain an interlayer spacing of around 1 nm. Correspondingly, GO membranes in solvents with high solubility distance exhibit better separation performance, for example, more than 90% rejection of small organic dye molecules (e.g., rhodamine B and methylene blue) in ethanol and acetone. Additionally, solvents with higher solubility distance results in a higher slip velocity in GO channels and thus higher solvent flux through the GO membrane.

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Solvent dependent solute solubility governs retention in silicone based organic solvent nanofiltration

Cited by 33 publications

References 33 publications

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

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

Highly stable PDMS–PTFPMS/PVDF OSN membranes for hexane recovery during vegetable oil production

Correlating Interlayer Spacing and Separation Capability of Graphene Oxide Membranes in Organic Solvents

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