Fabrication of nanofiltration membranes via stepwise assembly of oligoamide on alumina supports: Effect of number of reaction cycles on membrane properties

Amelio, Antonio; Sangermano, Marco; Kasher, Roni; Bernstein, Roy; Tiraferri, Alberto

doi:10.1016/j.memsci.2017.08.067

Cited by 11 publications

(3 citation statements)

References 40 publications

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“…The grafting of organic/polymeric moieties to alumina membranes has proven to be a convenient post-modification technique to adjust and control the membrane properties [13]. The surface OH groups are first treated with a primer acting as a linker/coupling agent between the surface OH and the organic/polymer moiety [27,28]. In order to obtain this first step, various silane coupling agents have been investigated [29,30].…”

Section: Introductionmentioning

confidence: 99%

Poly (maleic anhydride-alt-1-alkenes) directly grafted to γ-alumina for high-performance organic solvent nanofiltration membranes

Amirilargani

Merlet

Nijmeijer

et al. 2018

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Poly (maleic anhydride-alt-1-alkenes) directly grafted to γ-alumina for high-performance organic solvent nanofiltration membranes

Amirilargani

Merlet

Nijmeijer

et al. 2018

Journal of Membrane Science

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“…Amelio et al [101] cycled the addition of monomers trimesoyl chloride and mphenylenediamine to an APTES-functionalized, anodized-alumina substrate. The resulting membranes were only tested for salt retention, retention peaking at 5 layers with 76% NaCl retention with a water permeability of 0.6 L.m -2 h -1 bar -1 .…”

Section: 24mentioning

confidence: 99%

“…Though the macropores in the α-alumina are large enough to accommodate these monomers, no data was published on either the retention or stability of such membranes. The work presented by Amelio et al [101] shows scant evidence of pore modification but is instead focused on the creation of a layer on top of the alumina support, which is likely to suffer from the same problems of polyimides layers that are exposed to non-polar solvents. In a broader context, the step-by-step approach has several drawbacks compared to grafting-from or grafting-to.…”

Section: Evaluation and Comparisonmentioning

confidence: 99%

Growing to Shrink: Grafting alumina mesopores for molecular separations

Merlet

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Hybrid, ceramic-based membranes combine the stability of porous ceramic oxides with the functionality of polymers. The wide range of polymers allows for tailor-made materials matching the requirements of the target application. This thesis expands upon the materials, fabrication techniques and potential applications of hybrid, ceramic-based membranes. Chapter 2 first gives an overview of the recent progress in grafted ceramics for organic solvent nanofiltration (OSN) applications. It provides an overview of suitable organic-inorganic linking functions, reviews the strategies to tune the pore surface and compares the resulting membranes. Also discussed are the capabilities and shortcomings of both the characterization tools and the transport models used to describe this class of membranes. The link between material chemistry, grafting technique and performance is established as the challenges awaiting the researcher of hybrid, ceramic-based membranes are identified. This chapter serves to frame the advances presented in the following Chapters for the reader. Chapter 3 presents the grafting-from technique applied to the confined mesopores of ɣ-alumina. It is the first instance of controlled polymerization initiated from the surface of a high-curvature concave geometry. Polystyrene was grown inside 5 nm diameter pores to shrink to a desired degree, demonstrating the ability to tune the membrane selectivity. The parameters choices of the method used-surface-initiated, activators-regenerated-by-electron-transfer, atom-transfer radical polymerization (SI-ARGET-ATRP)-are detailed. The graft is characterized by TGA, AFM, and FTIR, and it is shown that the graft length is solvent-dependent. Also demonstrated is the application potential of this new class of hybrid, ceramic-based membrane as an organic solvent nanofiltration membrane. The top performing membrane exhibited a toluene permeability of 2.0 L.m-2 h-1 bar-1 accompanied by a 90% retention of diphenylanthracene (MW 330 g mol-1). Chapter 4 features further development of the grafting-from method with a novel material and for a different application, poly(ionic liquid) [StyMim][Tf2N] for CO2 separation. The same support substrate as Chapter 3 was used for SI-ARGET-ATRP, although adjustments to the reaction reagents and parameters were required. These are explained alongside the gas transport behavior through membranes made by successive polymerizations. The dense-pore gas separation membrane is characterized by means of AFM, XPS, SEM/EDS, and FTIR. A CO2 permeance of 0.47×10-7 (mol.m-2 s-1 Pa-1) and a CO2/N2 permselectivity of 14 was achieved, providing an encouraging beginning for development of this new membrane class. Chapter 5 presents two new unique achievements: a thioether-based aromatic crosslinked selective layer, and a green interfacial polymerization (IP) technique. Before this work, toxic solvents were use for the production of chemically and thermally resistant nanofiltration membranes. The use of non-toxic solvents for the synthesis of these membranes w...

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Electron Microscopy: An Important Tool for Preparation and Characterization of Asymmetric Ceramic-Polymer Composite Nanofiltration Membrane

Roy

Majumdar

Sahoo

et al. 2021

Applications of Microscopy in Materials and Life Sciences

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Fabrication of nanofiltration membranes via stepwise assembly of oligoamide on alumina supports: Effect of number of reaction cycles on membrane properties

Cited by 11 publications

References 40 publications

Poly (maleic anhydride-alt-1-alkenes) directly grafted to γ-alumina for high-performance organic solvent nanofiltration membranes

Poly (maleic anhydride-alt-1-alkenes) directly grafted to γ-alumina for high-performance organic solvent nanofiltration membranes

Growing to Shrink: Grafting alumina mesopores for molecular separations

Electron Microscopy: An Important Tool for Preparation and Characterization of Asymmetric Ceramic-Polymer Composite Nanofiltration Membrane

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