New frontiers in sustainable membrane preparation: Cyrene™ as green bioderived solvent

Marino, Tiziana; Galiano, Francesco; Molino, Antonio; Figoli, Alberto

doi:10.1016/j.memsci.2019.03.034

Cited by 153 publications

(114 citation statements)

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“…The recently published alternatives Rhodiasolv Polarclean, TamiSolve NxG, DMSO EVOL are products of the petrochemical industry and therefore not based on a renewable feedstock . Since only PESU membranes with potential application in microfiltration could be obtained with Cyrene, AGNIQUE AMD 3L represents today the only efficient solvent for the preparation of PESU UF membranes that fully complies with the “Green Chemistry” principles.…”

Section: Resultsmentioning

confidence: 99%

“…According to the 12 principles of “Green Chemistry,” solvents as auxiliary substances should be made unnecessary wherever possible and innocuous when used . Advances in the use of nontoxic or harmless solvents for membrane fabrication have been reviewed and recently for selected polymers like PESU, polysulfone (PSU), PVDF, and cellulose acetate with Rhodiasolv PolarClean and TamiSolve NxG, dimethyl sulfoxide (DMSO) EVOL, and Cyrene published.…”

Section: Introductionmentioning

confidence: 99%

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AGNIQUE AMD 3L as green solvent for polyethersulfone ultrafiltration membrane preparation

Gronwald

Weber

2019

J of Applied Polymer Sci

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With the advent of the green chemistry concept novel, innocuous, biodegradable solvents require introduction in industrial processes. N,N-dimethyl lactamide (AGNIQUE AMD 3L) represents a bio-based, biodegradable, label-free polar, protic solvent. In this article, AGNIQUE AMD 3L is introduced as novel solvent for preparation of polyethersulfone (PESU) nonsolvent-induced phase separation ultrafiltration membranes using polyvinylpyrrolidone or poly(ethylene oxide) as second dope additives. Analysis of Hansen solubility parameters indicates good solvent-polymer interactions for polymer dope compositions required for PESU membrane manufacturing. Depending on the process conditions, PESU ultrafiltration membranes with hydraulic permeability values up to 610 kg m −2 × bar × h and molecular weight cutoff value of 20 kDa were obtained. Scanning electron microscope of membrane cross sections reveals perfect defectfree, asymmetric morphologies. As a result, AGNIQUE AMD 3L provides a new alternative as replacement for polar, aprotic solvents employed in membrane manufacturing so far.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

AGNIQUE AMD 3L as green solvent for polyethersulfone ultrafiltration membrane preparation

Gronwald

Weber

2019

J of Applied Polymer Sci

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“…Currently, an emerging topic is the substitution of potentially hazardous solvents such as N ‐methyl‐2‐pyrrolidone (NMP) through greener alternatives . The aim of this substitution is the minimization of the environmental impact and the simultaneous maximization of the membrane fabrication sustainability, in order to meet the criteria of green chemistry . However, for the replacement of potentially harmful solvents, a profound understanding of the solvent impact is crucial.…”

Section: Introductionmentioning

confidence: 99%

Influences of different preparation variables on polymeric membrane formation via nonsolvent induced phase separation

Kahrs

Gühlstorf

Schwellenbach

2019

J of Applied Polymer Sci

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This work presents a comparative study on the formation of polyethersulfone ultrafiltration membranes via nonsolventinduced phase separation (NIPS) in two different solvent systems. N-methyl-2-pyrrolidone was chosen as conventional solvent and 2-pyrrolidone as a greener alternative. The overall objective was to obtain a mechanistic clarification of the membrane formation process in dependence of the most important controlling parameters. By performing different series of experiments, it was possible to determine the differences between the two solvents regarding the effects of variations in nonsolvent additives, polymer concentration, and precipitation conditions. It was found that a raising concentration of several nonsolvents, the increase of the polymer concentration and changes in the precipitation conditions can suppress the formation of macrovoids, regardless of the applied solvent. In contrast, differences were observed with regard to the performance of the membrane prototypes. This study improves the understanding of membrane formation via NIPS and identifies the effects of different variables. It shows that the choice of the solvent is essential for the dominating formation mechanisms and therefore for the resulting membrane features. It also proves that green solvents can substitute hazardous solvents if the influencing variables are well-understood in order to control them for obtaining desired membrane properties.

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“…In this evolution, the tenth (use of renewable resources) and eleventh (replace or remove toxic reagents) principles of GAC are especially relevant [7]. In the liquid microextraction context, environmentally friendly solvents [10,11] such as CyreneTM [12] and deep eutectic solvents [13] are clear examples of this progress.The paradigm of our production system, which up to now has been based on a linear "take-make-dispose" model, is progressively changed to a circular model [14] where reusing, repairing, refurbishing, and recycling appear as key terms. The use of surpluses of natural products as raw materials for the preparation of new sorbents is an interesting contribution of analytical chemistry for changing the production model.…”

mentioning

confidence: 99%

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confidence: 99%

Returning to Nature for the Design of Sorptive Phases in Solid-Phase Microextraction

et al. 2019

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Green analytical chemistry principles aim to minimize the negative impact of analytical procedures in the environment, which can be considered both at close (to ensure the safety of the analysts) and global (to conserve our natural resources) levels. These principles suggest, among other guidelines, the reduction/minimization of the sample treatment and the use of renewable sources when possible. The first aspect is largely fulfilled by microextraction, which is considered to be among the greenest sample treatment techniques. The second consideration is attainable if natural products are used as raw materials for the preparation of new extraction phases. This strategy is in line with the change in our production system, which is being gradually moved from a linear model (take-make-dispose) to a circular one (including reusing and recycling as key terms). This article reviews the potential of natural products as sorbents in extraction and microextraction techniques from the synergic perspectives of two research groups working on the topic. The article covers the use of unmodified natural materials and the modified ones (although the latter has a less green character) to draw a general picture of the usefulness of the materials.Separations 2020, 7, 2 2 of 22 principle identifies one of the trends of current research in analytical sciences, it is difficult to be applied when complex samples containing the analytes at very low concentrations are processed. In such scenarios, the simplification of the sample treatment and the reduction of the sources applied (reagents, energy) can be a more practical objective, at least currently. Microextraction techniques fulfill the latter criteria [8], and they are considered among the greenest sample treatment techniques [9].Microextraction techniques have evolved in the last decade following some key trends. Among them, the development of new extraction phases can be highlighted, considering the context of this review article. In this evolution, the tenth (use of renewable resources) and eleventh (replace or remove toxic reagents) principles of GAC are especially relevant [7]. In the liquid microextraction context, environmentally friendly solvents [10,11] such as CyreneTM [12] and deep eutectic solvents [13] are clear examples of this progress.The paradigm of our production system, which up to now has been based on a linear "take-make-dispose" model, is progressively changed to a circular model [14] where reusing, repairing, refurbishing, and recycling appear as key terms. The use of surpluses of natural products as raw materials for the preparation of new sorbents is an interesting contribution of analytical chemistry for changing the production model. This review article, which combines the vision of two research groups working in the topic, tries to draw the general picture of the potential of natural products for the synthesis of new sorptive phases in solid phase extraction and solid phase microextraction. The article will cover strategies with different green characterist...

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New frontiers in sustainable membrane preparation: Cyrene™ as green bioderived solvent

Cited by 153 publications

References 70 publications

AGNIQUE AMD 3L as green solvent for polyethersulfone ultrafiltration membrane preparation

AGNIQUE AMD 3L as green solvent for polyethersulfone ultrafiltration membrane preparation

Influences of different preparation variables on polymeric membrane formation via nonsolvent induced phase separation

Returning to Nature for the Design of Sorptive Phases in Solid-Phase Microextraction

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