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Mechanically strong, anti-fouling and pH-resistant isoporous membranes prepared from chemically designed new block copolymers. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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2
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Zhang Z, Rahman MM, Bajer B, Scharnagl N, Abetz V. Highly selective isoporous block copolymer membranes with tunable polyelectrolyte brushes in soft nanochannels. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2022.120266] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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3
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Lang C, Kumar M, Hickey RJ. Current status and future directions of self-assembled block copolymer membranes for molecular separations. SOFT MATTER 2021; 17:10405-10415. [PMID: 34768280 DOI: 10.1039/d1sm01368h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
One of the most efficient and promising separation alternatives to thermal methods such as distillation is the use of polymeric membranes that separate mixtures based on molecular size or chemical affinity. Self-assembled block copolymer membranes have gained considerable attention within the membrane field due to precise control over nanoscale structure, pore size, and chemical versatility. Despite the rapid progress and excitement, a significant hurdle in using block copolymer membranes for nanometer and sub-nanometer separations such as nanofiltration and reverse osmosis is the lower limit on domain size features. Strategies such as polymer post-functionalization, self-assembly of oligomers, liquid crystals, and random copolymers, or incorporation of artificial/natural channels within block copolymer materials are future directions with the potential to overcome current limitations with respect to separation size.
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Affiliation(s)
- Chao Lang
- South China Advanced Institute for Soft Matter Science and Technology, School of Molecular Science and Engineering, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16801, USA.
| | - Manish Kumar
- Department of Civil, Architectural, and Environmental Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.
| | - Robert J Hickey
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16801, USA.
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania, 16801, USA
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Rahman MM. Selective Swelling and Functionalization of Integral Asymmetric Isoporous Block Copolymer Membranes. Macromol Rapid Commun 2021; 42:e2100235. [PMID: 34057263 DOI: 10.1002/marc.202100235] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/07/2021] [Indexed: 11/12/2022]
Abstract
SNIPS stands for a membrane fabrication technique that combines the evaporation induced self-assembly of the block copolymers and the classical nonsolvent induced phase separation. It is a one-step readily scalable technique to fabricate integral asymmetric isoporous membranes. The prominent developments in the last decade have carved out a niche for SNIPS as a potential technique to fabricate next generation isoporous membranes. In the last decade, a rich polymer library and variety of membrane postmodification routes have been successfully implemented to fabricate SNIPS membranes having the desired pore functionality. Some of these membranes form soft nanochannels in hydrated state due to swelling of the pore wall, i.e., the pore forming block of the block copolymer. These membranes having soft nanochannels have demonstrated the potential to perform several challenging separation tasks in ultrafiltration and nanofiltration. This paper highlights the currently accessible pore functionality, the strategies to tune the swelling of the soft nanochannels, the potential applications, and future perspectives of these membranes.
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Affiliation(s)
- Md Mushfequr Rahman
- Helmholtz-Zentrum Hereon, Institute of Membrane Research, Max-Planck-Straße 1, Geesthacht, 21502, Germany
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Foroutani K, Ghasemi SM, Pourabbas B. Molecular tailoring of polystyrene-block-poly (acrylic acid) block copolymer toward additive-free asymmetric isoporous membranes via SNIPS. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119099] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Wang J, Rahman MM, Abetz C, Abetz V. Tuning the size selectivity of isoporous membranes for protein fractionation via two scalable post treatment approaches. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118535] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Wang J, Rahman MM, Abetz C, Abetz V. Bovine serum albumin selective integral asymmetric isoporous membrane. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118074] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Sankhala K, Koll J, Abetz V. Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow. MEMBRANES 2020; 10:E83. [PMID: 32353997 PMCID: PMC7281245 DOI: 10.3390/membranes10050083] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 01/26/2023]
Abstract
The conventional fabrication of isoporous membranes via the evaporation-induced self-assembly of block copolymers in combination with non-solvent induced phase separation (SNIPS) is achieved under certain environmental conditions. In this study, we report a modification in the conventional fabrication process of (isoporous) flat sheet membranes in which the self-assembly of block copolymers is achieved by providing controlled evaporation conditions using gas flow and the process is introduced as gSNIPS. This fabrication approach can not only trigger and control the microphase separation but also provides isoporous structure formation in a much broader range of solution concentrations and casting parameters, as compared to fabrication under ambient, uncontrolled conditions. We systematically investigated the structure formation of the fabrication of integral asymmetric isoporous membranes by gSNIPS. A quantitative correlation between the evaporation conditions (causing solvent evaporation and temperature drop) and the self-assembly of block copolymers beginning from the top layer up to a certain depth, orientation of pores in the top layer and the substructure morphology has been discussed empirically.
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Affiliation(s)
- Kirti Sankhala
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
| | - Joachim Koll
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
| | - Volker Abetz
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Strasse 1, 21502 Geesthacht, Germany
- Institute of Physical Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
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Zhang Z, Rahman MM, Abetz C, Höhme AL, Sperling E, Abetz V. Chemically Tailored Multifunctional Asymmetric Isoporous Triblock Terpolymer Membranes for Selective Transport. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e1907014. [PMID: 31945230 DOI: 10.1002/adma.201907014] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/06/2019] [Indexed: 06/10/2023]
Abstract
Membrane-based separation of organic molecules with 1-2 nm lateral dimensions is a demanding but rather underdeveloped technology. The major challenge is to fabricate membranes having distinct nanochannels with desired functionality. Here, a bottom-up strategy to produce such a membrane using a tailor-made triblock terpolymer featuring miscible end blocks with two different functional groups is demonstrated. A scalable multifunctional integral asymmetric isoporous membrane is fabricated by the solvent evaporation-induced self-assembly of the block copolymer combined with nonsolvent-induced phase separation. The membrane nanopores are readily functionalized using positively and negatively charged moieties by two straightforward gas-solid reactions. The pores of the post-functionalized membranes act as target-specific functional soft nanochannels due to swelling of the polyelectrolyte blocks in a hydrated state. The membranes show unprecedented separation selectivity of small molecules based on size and/or charge which demonstrates the potential of the proposed strategy to prepare next-generation nanofiltration membranes.
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Affiliation(s)
- Zhenzhen Zhang
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Md Mushfequr Rahman
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Clarissa Abetz
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Anke-Lisa Höhme
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Evgeni Sperling
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
| | - Volker Abetz
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502, Geesthacht, Germany
- Institute of Physical Chemistry, University of Hamburg, Martin-Luther-King-Platz 6, 20146, Hamburg, Germany
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Saleem S, Rangou S, Abetz C, Filiz V, Abetz V. Isoporous Membranes from Novel Polystyrene- b-poly(4-vinylpyridine)- b-poly(solketal methacrylate) (PS- b-P4VP- b-PSMA) Triblock Terpolymers and Their Post-Modification. Polymers (Basel) 2019; 12:E41. [PMID: 31888039 PMCID: PMC7023574 DOI: 10.3390/polym12010041] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 12/17/2019] [Accepted: 12/19/2019] [Indexed: 11/22/2022] Open
Abstract
In this paper, the formation of nanostructured triblock terpolymer polystyrene-b-poly(4-vinylpyridine)-b-poly(solketal methacrylate) (PS-b-P4VP-b-PSMA), polystyrene-b-poly(4-vinylpyridine)-b-poly(glyceryl methacrylate) (PS-b-P4VP-b-PGMA) membranes via block copolymer self-assembly followed by non-solvent-induced phase separation (SNIPS) is demonstrated. An increase in the hydrophilicity was observed after treatment of non-charged isoporous membranes from PS-b-P4VP-b-PSMA, through acidic hydrolysis of the hydrophobic poly(solketal methacrylate) PSMA block into a hydrophilic poly(glyceryl methacrylate) PGMA block, which contains two neighbored hydroxyl (-OH) groups per repeating unit. For the first time, PS-b-P4VP-b-PSMA triblock terpolymers with varying compositions were successfully synthesized by sequential living anionic polymerization. Composite membranes of PS-b-P4VP-b-PSMA and PS-b-P4VP-b-PGMA triblock terpolymers with ordered hexagonally packed cylindrical pores were developed. The morphology of the membranes was studied with scanning electron microscopy (SEM) and atomic force microscopy (AFM). PS-b-P4VP-b-PSMA triblock terpolymer membranes were further treated with acid (1 M HCl) to get polystyrene-b-poly(4-vinylpyridine)-b-poly(glyceryl methacrylate) (PS-b-P4VP-b-PGMA). Notably, the pristine porous membrane structure could be maintained even after acidic hydrolysis. It was found that membranes containing hydroxyl groups (PS-b-P4VP-b-PGMA) show a stable and higher water permeance than membranes without hydroxyl groups (PS-b-P4VP-b-PSMA), what is due to the increase in hydrophilicity. The membrane properties were analyzed further by contact angle, protein retention, and adsorption measurements.
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Affiliation(s)
- Sarah Saleem
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str.1, 21502 Geesthacht, Germany; (S.S.); (S.R.); (C.A.); (V.F.)
| | - Sofia Rangou
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str.1, 21502 Geesthacht, Germany; (S.S.); (S.R.); (C.A.); (V.F.)
| | - Clarissa Abetz
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str.1, 21502 Geesthacht, Germany; (S.S.); (S.R.); (C.A.); (V.F.)
| | - Volkan Filiz
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str.1, 21502 Geesthacht, Germany; (S.S.); (S.R.); (C.A.); (V.F.)
| | - Volker Abetz
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Str.1, 21502 Geesthacht, Germany; (S.S.); (S.R.); (C.A.); (V.F.)
- Institute of Physical Chemistry, Universität Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
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Gil Haenelt T, Meyer A, Abetz C, Abetz V. Planet‐Like Nanostructures Formed by an ABC Triblock Terpolymer. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900297] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Taida Gil Haenelt
- Institute of Physical ChemistryUniversity of Hamburg Martin‐Luther‐King‐Platz 6 20146 Hamburg Germany
| | - Andreas Meyer
- Institute of Physical ChemistryUniversity of Hamburg Martin‐Luther‐King‐Platz 6 20146 Hamburg Germany
| | - Clarissa Abetz
- Helmholtz‐Zentrum GeesthachtInstitute of Polymer Research Max‐Planck‐Strasse 1 21502 Geesthacht Germany
| | - Volker Abetz
- Institute of Physical ChemistryUniversity of Hamburg Martin‐Luther‐King‐Platz 6 20146 Hamburg Germany
- Helmholtz‐Zentrum GeesthachtInstitute of Polymer Research Max‐Planck‐Strasse 1 21502 Geesthacht Germany
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13
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Zhang Z, Rahman MM, Abetz C, Bajer B, Wang J, Abetz V. Quaternization of a Polystyrene‐
block
‐poly(4‐vinylpyridine) Isoporous Membrane: An Approach to Tune the Pore Size and the Charge Density. Macromol Rapid Commun 2018; 40:e1800729. [DOI: 10.1002/marc.201800729] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 10/30/2018] [Indexed: 01/22/2023]
Affiliation(s)
- Zhenzhen Zhang
- Institute of Polymer ResearchHelmholtz‐Zentrum Geesthacht Max‐Planck‐Str. 1 21502 Geesthacht Germany
| | - Md. Mushfequr Rahman
- Institute of Polymer ResearchHelmholtz‐Zentrum Geesthacht Max‐Planck‐Str. 1 21502 Geesthacht Germany
| | - Clarissa Abetz
- Institute of Polymer ResearchHelmholtz‐Zentrum Geesthacht Max‐Planck‐Str. 1 21502 Geesthacht Germany
| | - Barbara Bajer
- Institute of Polymer ResearchHelmholtz‐Zentrum Geesthacht Max‐Planck‐Str. 1 21502 Geesthacht Germany
| | - Jiali Wang
- Institute of Polymer ResearchHelmholtz‐Zentrum Geesthacht Max‐Planck‐Str. 1 21502 Geesthacht Germany
| | - Volker Abetz
- Institute of Polymer ResearchHelmholtz‐Zentrum Geesthacht Max‐Planck‐Str. 1 21502 Geesthacht Germany
- Institute of Physical ChemistryUniversity of Hamburg Martin‐Luther‐King‐Platz 6 20146 Hamburg Germany
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Politakos N, Kortaberria G. Exploring the Self-Assembly Capabilities of ABA-Type SBS, SIS, and Their Analogous Hydrogenated Copolymers onto Different Nanostructures Using Atomic Force Microscopy. MATERIALS 2018; 11:ma11091529. [PMID: 30149581 PMCID: PMC6165061 DOI: 10.3390/ma11091529] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/16/2018] [Accepted: 08/21/2018] [Indexed: 12/16/2022]
Abstract
In this work, the self-assembled morphologies obtained for poly(styrene-b-butadiene-b-styrene) (SBS) and poly(styrene-b-isoprene-b-styrene) (SIS) ABA-type copolymers were investigated before and after hydrogenation of the polydiene block, which led to poly(styrene-b-ethylene)/poly(ethylene-b-styrene) (SEES) and poly(styrene-b-ethylene)/poly(propylene-b-styrene) (SEPS) copolymers, respectively. The evaluation of different morphologies was carried out using atomic force microscopy (AFM), analyzing the effect of various parameters such as the solvent and polymer concentrations employed for film casting (toluene, cyclohexane, or tetrahydrofurane with concentrations of 1 and 3 wt%), together with that of the annealing treatment (thermal annealing at room temperature, and 60, 80, and 100 °C). The effect of these parameters in combination with the chemical nature of the polydiene block led to different morphologies with different topographic aspects affecting the roughness (Ra) of the film.
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Affiliation(s)
- Nikolaos Politakos
- POLYMAT and Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa 72, 20018 Donostia-San Sebastian, Spain.
- "Materials + Technologies" Group, Chemical & Environmental Engineering Department, Basque Country University, Plaza Europa 1, 20018 Donostia-San Sebastian, Spain.
| | - Galder Kortaberria
- "Materials + Technologies" Group, Chemical & Environmental Engineering Department, Basque Country University, Plaza Europa 1, 20018 Donostia-San Sebastian, Spain.
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