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Werber JR, Peterson C, Stipanic DF, Hillmyer MA. Polymeric Microcapsules as Robust Mimics of Emulsion Liquid Membranes for Selective Ion Separations. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:17352-17363. [PMID: 36395268 DOI: 10.1021/acs.est.2c07242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Selective ion separations are increasingly needed to combat water scarcity, recover resources from wastewater, and enable the efficient recycling of electronics waste. Emulsion liquid membranes (ELMs) have received interest due to rapid kinetics, high selectivities, and low solvent requirements but are too unstable for industrial usage. We demonstrate that polymeric microcapsules can serve as robust, solvent-free mimics of ELMs. As a proof of concept, we incorporated the copper-selective ligand Lix 84-I in the walls of microcapsules formed from a commercial polystyrene-b-polybutadiene-b-polystyrene triblock polymer. The microcapsules were formed from a double-emulsion template, resulting in particles typically 20-120 μm in diameter that encapsulated even smaller droplets of a dilute (≤0.5 M) H2SO4 solution. Batch experiments demonstrated facilitated-transport behavior, with equilibrium reached in as little as 10 min for microcapsules with 1% ligand, and with ∼15-fold selectivity for Cu2+ over Ni2+. Furthermore, the microcapsules could be packed readily in columns for flow-through operation, thus enabling near-complete Cu2+ removal in ∼2 min under certain conditions, recovery of Cu2+ by flowing through fresh dilute H2SO4, and reuse for at least 10 cycles. The approach in this work can serve as a template for using selective ligands to enable robust and simple flow-through processes for a variety of selective ion separations.
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Affiliation(s)
- Jay R Werber
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, Toronto, M5S 3E5, Canada
| | - Colin Peterson
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
| | - Dean F Stipanic
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, Toronto, M5S 3E5, Canada
| | - Marc A Hillmyer
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota55455, United States
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Oukkass S, Mechnou I, El Yaakouby I, Chaouqi Y, Lebrun L, Hlaibi M. Efficient and Original Technique for the Optimization and Intensification of Membrane Processes Relating to the Treatment and Recovery of Discharges Loaded with the Emerging Pollutant Paracetamol. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saâd Oukkass
- Laboratoire Génie des Matériaux pour Environnement et Valorisation (GeMEV), Equipe I3MP, Faculté des Sciences Aïn Chock, Université HASSAN II de Casablanca, Maroc
| | - I. Mechnou
- Laboratoire Génie des Matériaux pour Environnement et Valorisation (GeMEV), Equipe I3MP, Faculté des Sciences Aïn Chock, Université HASSAN II de Casablanca, Maroc
| | - I. El Yaakouby
- Laboratoire Génie des Matériaux pour Environnement et Valorisation (GeMEV), Equipe I3MP, Faculté des Sciences Aïn Chock, Université HASSAN II de Casablanca, Maroc
| | - Y. Chaouqi
- Laboratoire Génie des Matériaux pour Environnement et Valorisation (GeMEV), Equipe I3MP, Faculté des Sciences Aïn Chock, Université HASSAN II de Casablanca, Maroc
| | - L. Lebrun
- Laboratoire Polymères, Biopolymères, Surfaces (PBS), UMR 6270 du CNRS, Faculté des Sciences et Techniques, F-76821 Mont-Saint-Aignan, France
| | - M. Hlaibi
- Laboratoire Génie des Matériaux pour Environnement et Valorisation (GeMEV), Equipe I3MP, Faculté des Sciences Aïn Chock, Université HASSAN II de Casablanca, Maroc
- Laboratoire Polymères, Biopolymères, Surfaces (PBS), UMR 6270 du CNRS, Faculté des Sciences et Techniques, F-76821 Mont-Saint-Aignan, France
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Sellami F, Kebiche-Senhadji O, Marais S, Fatyeyeva K. PVC/EVA-based polymer inclusion membranes with improved stability and Cr(VI) extraction capacity: Water plasticization effect. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129069. [PMID: 35594668 DOI: 10.1016/j.jhazmat.2022.129069] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 04/19/2022] [Accepted: 05/01/2022] [Indexed: 06/15/2023]
Abstract
Polymer inclusion membranes (PIMs) are far investigated for their ability to extract heavy metals and small organic compounds from aqueous media. Polyvinyl chloride (PVC) is one of the most widely used base polymers for the PIM elaboration. However, its use requires the incorporation of a relatively expensive liquid plasticizer. In the present work, poly(ethylene-co-vinyl acetate) (EVA) serves as a polymer plasticizer for the elaboration of PIMs based on PVC as a base polymer and Aliquat 336 as a carrier. The composition of PIMs was optimized in terms of the PVC/EVA ratio and the vinyl acetate (VA) groups content (x) of EVA (i.e. EVAx). Physical-chemical properties of the resulting membranes are analyzed and correlated with their structure. The results of SEM analysis revealed miscible PVC/EVA70 blends (i.e. with 70 wt% of VA groups) and partially miscible PVC/EVA40 blends. The plasticizing effect of the EVA copolymer was confirmed by the tensile test results. The results of transport measurements showed that PIMs containing EVA40 and PVC are more efficient for the Cr(VI) extraction than those with only PVC. Thus, EVA40 can effectively replace the conventional liquid plasticizers while improving the Cr(VI) permeability. Besides, it is stated that EVA40-based PIMs are more stable as compared with conventional PIMs due to the water plasticizing effect. After the membrane optimization, the highest Cr(VI) transport flux (54.7 µmol·m-2·s-1) was measured. Moreover, the addition of 10 wt% of tetradecanol causes the increase of the water plasticizing effect and allows obtaining a PIM with high stability (up to 24 cycles) required for the membrane long-term operation.
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Affiliation(s)
- Ferhat Sellami
- Laboratoire de Procédés Membranaires et de Technique de Séparation et de Récupération (LPMSTR), Université de Bejaia, Targa Ouzemour, 06000 Bejaia, Algeria; Normandie Univ., UNIROUEN, INSA ROUEN, CNRS, Polymères, Biopolymères, Surfaces (PBS), 76000 Rouen, France
| | - Ounissa Kebiche-Senhadji
- Laboratoire de Procédés Membranaires et de Technique de Séparation et de Récupération (LPMSTR), Université de Bejaia, Targa Ouzemour, 06000 Bejaia, Algeria
| | - Stéphane Marais
- Normandie Univ., UNIROUEN, INSA ROUEN, CNRS, Polymères, Biopolymères, Surfaces (PBS), 76000 Rouen, France
| | - Kateryna Fatyeyeva
- Normandie Univ., UNIROUEN, INSA ROUEN, CNRS, Polymères, Biopolymères, Surfaces (PBS), 76000 Rouen, France.
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Stability study of polymer inclusion membranes (PIMs) based on acidic (D2EHPA), basic (Aliquat 336) and neutral (TOPO) carriers: effect of membrane composition and aqueous solution. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04362-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maiphetlho K, Chimuka L, Tutu H, Richards H. Technical design and optimisation of polymer inclusion membranes (PIMs) for sample pre-treatment and passive sampling - A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149483. [PMID: 34426342 DOI: 10.1016/j.scitotenv.2021.149483] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 07/14/2021] [Accepted: 08/01/2021] [Indexed: 06/13/2023]
Abstract
This review reports on the increasing interest in technical designs, calibration, and application of PIM-based devices in sample pre-treatment and passive sampling in environmental water monitoring from 2010 to 2021. With regards to passive sampling, devices are calibrated in a laboratory setup using either a dip-in or flow-through approach before environmental application. In sample preparation, the device set-ups can be offline, online or in a continuous flow separation device connected to a flow injection analysis system. The PIMs have also demonstrated potential in both these offline and online separations; however, there is still a draw-back of low diffusion coefficients obtained in these PIM set-ups. Electro-driven membrane (EME) extraction has demonstrated better performance as well as improved analyte flux. Critical in electro-driven membrane extraction is applying correct voltage that may not compromise the PIM performance due to leaching of components to the aqueous solutions. Further, besides different PIM configurations and designs being developed, PIM based extractions are central to PIM components (base polymer, carrier and plasticizer). As such, recent studies have also focused on improving PIM stability by investigating use of various PIM components, incorporating nano additives into the PIM composition, and investigating novel green PIM synthetic routes. All these aspects are covered in this review. Further, some recent studies that have demonstrated the ability to eliminate effects of flow patterns and membrane biofouling in PIM based applications are also included.
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Affiliation(s)
- Kgomotso Maiphetlho
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa
| | - Luke Chimuka
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa
| | - Hlanganani Tutu
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa
| | - Heidi Richards
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa.
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Kazemi D, Yaftian MR, Kolev SD. Selective extraction of Bi(III) from sulfate solutions by a poly(vinyl chloride) based polymer inclusion membrane incorporating bis(2-ethylhexyl)phosphoric acid as the extractant. REACT FUNCT POLYM 2021. [DOI: 10.1016/j.reactfunctpolym.2021.104935] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Yan J, Yan S, Tilly JC, Ko Y, Lee B, Spontak RJ. Ionic complexation of endblock-sulfonated thermoplastic elastomers and their physical gels for improved thermomechanical performance. J Colloid Interface Sci 2020; 567:419-428. [PMID: 32088505 DOI: 10.1016/j.jcis.2020.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/02/2020] [Accepted: 02/03/2020] [Indexed: 11/20/2022]
Abstract
Thermoplastic elastomers (TPEs) composed of nonpolar triblock copolymers constitute a broadly important class of (re)processable network-forming macromolecules employed in ubiquitous commercial applications. Physical gelation of these materials in the presence of a low-volatility oil that is midblock-selective yields tunably soft TPE gels (TPEGs) that are suitable for emergent technologies ranging from electroactive, phase-change and shape-memory responsive media to patternable soft substrates for flexible electronics and microfluidics. Many of the high-volume TPEs used for these purposes possess styrenic endblocks that are inherently limited by a relatively low glass transition temperature. To mitigate this shortcoming, we sulfonate and subsequently complex (and physically crosslink) the endblocks with trivalent Al3+ ions. Doing so reduces the effective hydrophilicity of the sulfonated endblocks, as evidenced by water uptake measurements, while concurrently enhancing the thermomechanical stability of the corresponding TPEGs. Chemical modification results, as well as morphological and property development, are investigated as functions of the degree of sulfonation, complexation and TPEG composition.
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Affiliation(s)
- Jiaqi Yan
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Shaoyi Yan
- Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Joseph C Tilly
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Yeongun Ko
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Byeongdu Lee
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Richard J Spontak
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA; Department of Materials Science & Engineering, North Carolina State University, Raleigh, NC 27695, USA.
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Separation of Zn(II), Cr(III), and Ni(II) Ions Using the Polymer Inclusion Membranes Containing Acetylacetone Derivative as the Carrier. MEMBRANES 2020; 10:membranes10050088. [PMID: 32365774 PMCID: PMC7281230 DOI: 10.3390/membranes10050088] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/20/2020] [Accepted: 04/28/2020] [Indexed: 11/17/2022]
Abstract
Polymer inclusion membranes (PIMs) doped with ethylenodiamino-bis-acetylacetone as fixed carrier was applied for the investigation of the facilitated transport of Zn(II), Cr(III), and Ni(II) ions from an aqueous nitrate feed phase (cM = 0.001 mol/dm3). The optimal membrane composition (amount of carrier and o-NPPE-plasticizer) was determined. For the optimal polymer inclusion membranes doped with ethylenodiamino-bis-acetylacetone, the following patterns of transport selectivity were found: Zn(II) > Cr(III) > Ni(II). The initial flux of Zn(II), Cr(III), and Ni(II) ions was 6.37 µmol/m2∙s, 5.53 µmol/m2∙s, and 0.40 µmol/m2∙s, respectively. The selectivity coefficients equal to 1.2 and 15.9 were found for Zn(II)/Cr(III) and Zn(II)/Ni(II), respectively. After 24-h transport, the recovery factor of Zn(II), Cr(III), and Ni(II) were 90%, 65%, and 6%, respectively. The polymer inclusion membranes doped with ethylenodiamino-bis-acetylacetone were characterized by scanning electron microscopy and non-contact atomic force microscopy. The influence of membrane morphology on transport process was discussed.
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