1
|
SEBS-Ionic Liquid Block-Graft Copolymer-based Membranes with High Compatibility for Improved Gas Separation. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
2
|
González-Burgos M, Pomposo JA. Mapping the Extra Solvent Power of Ionic Liquids for Monomers, Polymers, and Dry/Wet Globular Single-Chain Polymer Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:3275-3282. [PMID: 29446636 DOI: 10.1021/acs.langmuir.7b04154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ionic liquids (ILs) have shown advantages in organic synthesis and catalysis, energy storage and conversion, and a variety of pharmaceutical applications. Understanding the miscibility behavior of IL/monomer, IL/polymer, and IL/polymer nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes as well as to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of extended three-component Flory-Huggins theory concerning the extra solvent power (ESP) of ILs when compared to traditional nonionic solvents for monomeric solutes (Case I), linear polymers (Case II), dry (i.e., without IL inside) globular single-chain polymer nanoparticles (SCNPs) (Case III), and wet (i.e., with IL inside) globular SCNPs (Case IV) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to Cases I, II, III, and IV at a constant temperature and pressure. Finally, a potential pathway to improve the miscibility of nonionic polymers in ILs is proposed.
Collapse
Affiliation(s)
- Marina González-Burgos
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC , Paseo Manuel de Lardizabal 5 , E-20018 San Sebastián , Spain
- Departamento de Física de Materiales , Universidad del País Vasco (UPV/EHU) , Apartado 1072 , E-20800 San Sebastián , Spain
| | - José A Pomposo
- Centro de Física de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC , Paseo Manuel de Lardizabal 5 , E-20018 San Sebastián , Spain
- Departamento de Física de Materiales , Universidad del País Vasco (UPV/EHU) , Apartado 1072 , E-20800 San Sebastián , Spain
- IKERBASQUE-Basque Foundation for Science , María Díaz de Haro 3 , E-48013 Bilbao , Spain
| |
Collapse
|
3
|
Chen Z, McDonald S, FitzGerald P, Warr GG, Atkin R. Small angle neutron scattering study of the conformation of poly(ethylene oxide) dissolved in deep eutectic solvents. J Colloid Interface Sci 2017; 506:486-492. [DOI: 10.1016/j.jcis.2017.07.068] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 07/11/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
|
4
|
Umapathi R, Vepuri SB, Venkatesu P, Soliman ME. Comprehensive Computational and Experimental Analysis of Biomaterial toward the Behavior of Imidazolium-Based Ionic Liquids: An Interplay between Hydrophilic and Hydrophobic Interactions. J Phys Chem B 2017; 121:4909-4922. [DOI: 10.1021/acs.jpcb.7b02208] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Suresh B. Vepuri
- K
L College of Pharmacy, K L University, Guntur 522 502, India
- Discipline
of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal (UKZN), Westville Campus, Durban 4000, South Africa
| | | | - Mahmoud E. Soliman
- Discipline
of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal (UKZN), Westville Campus, Durban 4000, South Africa
| |
Collapse
|
5
|
Qiao Y, Ma W, Theyssen N, Chen C, Hou Z. Temperature-Responsive Ionic Liquids: Fundamental Behaviors and Catalytic Applications. Chem Rev 2017; 117:6881-6928. [DOI: 10.1021/acs.chemrev.6b00652] [Citation(s) in RCA: 211] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yunxiang Qiao
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Wenbao Ma
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Nils Theyssen
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Chen Chen
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Zhenshan Hou
- Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| |
Collapse
|
6
|
Xiao Z, Larson RG, Chen Y, Zhou C, Niu Y, Li G. Unusual phase separation and rheological behavior of poly(ethylene oxide)/ionic liquid mixtures with specific interactions. SOFT MATTER 2016; 12:7613-7623. [PMID: 27546439 DOI: 10.1039/c6sm01220e] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The phase separation behavior of poly(ethylene oxide) (PEO) in ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) was investigated by rheological, optical microscopy, FT-IR and DSC measurements. It is demonstrated that specific interactions, particularly the hydrogen bonding between PEO and the ionic liquids as evidenced by FT-IR, in which a subtle but apparent absorption peak shift near the phase transition appears, account for the unusual low critical solution temperature (LCST) phase separation. Unlike the typical trend in which the storage modulus G' simply increases with temperature near the phase boundary for polymer blends without specific interaction, in our study, a novel "V-shaped" rheological response is observed, namely a dip in G' followed by an upturn, especially at low PEO concentration (<50 wt%). The magnitude of the "V" dip has heating rate and frequency dependences, while Tr (the phase transition temperature) is almost unchanged with heating rate and frequency. Upon increasing the alkyl chain length on the imidazolium ring from an ethyl to a butyl, the "V-shape" becomes more prominent and shifts to higher temperature, which is consistent with the results of FT-IR and DSC, evidently due to the stronger hydrogen bonding interaction between PEO and [BMIM][BF4] than [EMIM][BF4]. This unusual "V" dip might be tentatively ascribed to the coupling effects of the breaking of the "hydrogen bonding cage" formed between PEO chains and IL molecules and dissolution of the heterogeneous clusters as verified by FT-IR and TEM, respectively, and the following upturn is dominated by the interface formation upon phase separation.
Collapse
Affiliation(s)
- Zhilin Xiao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, China.
| | | | | | | | | | | |
Collapse
|
7
|
So S, Lodge TP. Size Control and Fractionation of Ionic Liquid Filled Polymersomes with Glassy and Rubbery Bilayer Membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4959-4968. [PMID: 27159064 DOI: 10.1021/acs.langmuir.6b00946] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We demonstrate control over the size of ionic liquid (IL) filled polymeric vesicles (polymersomes) by three distinct methods: mechanical extrusion, cosolvent-based processing in an IL, and fractionation of polymersomes in a biphasic system of IL and water. For the representative ionic liquid (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide ([EMIM][TFSI])), the size and dispersity of polymersomes formed from 1,2-polybutadiene-b-poly(ethylene oxide) (PB-PEO) and polystyrene-b-poly(ethylene oxide) (PS-PEO) diblock copolymers were shown to be sensitive to assembly conditions. During mechanical extrusion through a polycarbonate membrane, the relatively larger polymersomes were broken up and reorganized into vesicles with mean size comparable to the membrane pore (100 nm radius); the distribution width also decreased significantly after only a few passes. Other routes were studied using the solvent-switch or cosolvent (CS) method, whereby the initial content of the cosolvent and the PEO block length of PS-PEO were systemically changed. The nonvolatility of the ionic liquid directly led to the desired concentration of polymersomes in the ionic liquid using a single step, without the dialysis conventionally used in aqueous systems, and the mean vesicle size depended on the amount of cosolvent employed. Finally, selective phase transfer of PS-PEO polymersomes based on size was used to extract larger polymersomes from the IL to the aqueous phase via interfacial tension controlled phase transfer. The interfacial tension between the PS membrane and the aqueous phase was varied with the concentration of sodium chloride (NaCl) in the aqueous phase; then the larger polymersomes were selectively separated to the aqueous phase due to differences in shielding of the hydrophobic core (PS) coverage by the hydrophilic corona brush (PEO). This novel fractionation is a simple separation process without any special apparatus and can help to prepare monodisperse polymersomes and also separate unwanted morphologies (in this case, worm-like micelles).
Collapse
Affiliation(s)
- Soonyong So
- Department of Chemical Engineering & Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Timothy P Lodge
- Department of Chemical Engineering & Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| |
Collapse
|
8
|
Chen Z, McDonald S, Fitzgerald PA, Warr GG, Atkin R. Structural effect of glyme–Li+ salt solvate ionic liquids on the conformation of poly(ethylene oxide). Phys Chem Chem Phys 2016; 18:14894-903. [DOI: 10.1039/c6cp00919k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Conformation of poly(ethylene oxide) in solvate ionic liquids is affected by the solvent structure.
Collapse
Affiliation(s)
- Zhengfei Chen
- Priority Research Centre for Advanced Fluids and Interfaces
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
| | - Samila McDonald
- Priority Research Centre for Advanced Fluids and Interfaces
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
| | | | | | - Rob Atkin
- Priority Research Centre for Advanced Fluids and Interfaces
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
| |
Collapse
|
9
|
So S, Lodge TP. Interfacial tension-hindered phase transfer of polystyrene-b-poly(ethylene oxide) polymersomes from a hydrophobic ionic liquid to water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:594-601. [PMID: 25555164 DOI: 10.1021/la504605e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We examine the phase transfer of polystyrene-b-poly(ethylene oxide) (PS-PEO) polymersomes from a hydrophobic ionic liquid, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]), into water. The dependence of the phase transfer on the molecular weight and PEO volume fraction (fPEO) of the PS-PEO polymersomes was systematically studied by varying the molecular weight of PS (10,000-27,000 g/mol) as well as by varying the volume fraction of PEO (fPEO) between 0.1 and 0.3. We demonstrate a general boundary for the phase transfer in terms of a reduced tethering density for PEO (σPEO), which is independent of the molecular weight of the hydrophobic PS. The reduced PEO tethering density was controlled by changing the polymersome size (i.e., increased polymersome sizes increase σPEO), confirming that it is the driving force in the transfer of PS-PEO polymersomes at room temperature. The phase transfer dependence on σPEO was also analyzed in terms of the free energy of polymersomes in the biphasic system. The quality of the aqueous phase, which affects the interfacial tension of the PS membrane, influenced the phase transfer. We systematically reduced the interfacial tension by adding a water-selective solvent, THF, which has a similar effect to increasing σPEO. The results indicate that the interfacial tension between the membrane and water plays an important role in the phase transfer with the corona and that the phase transfer can be controlled either by the dimensions of the polymersomes or by the suitability of the solvent for the membrane. The interfacial tension-hindered phase transfer of polymersomes in the biphasic water-[EMIM][TFSI] system will inform the design of temperature-sensitive and reversible nanoreactors and the separation of polydisperse particles according to size by tuning the quality of the solvent.
Collapse
Affiliation(s)
- Soonyong So
- Department of Chemical Engineering & Materials Science and ‡Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | | |
Collapse
|
10
|
Chen Z, FitzGerald PA, Warr GG, Atkin R. Conformation of poly(ethylene oxide) dissolved in the solvate ionic liquid [Li(G4)]TFSI. Phys Chem Chem Phys 2015; 17:14872-8. [DOI: 10.1039/c5cp02033f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PEO dissolves in [Li(G4)]TFSI via coordination with Li+.
Collapse
Affiliation(s)
- Zhengfei Chen
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
| | | | | | - Rob Atkin
- Newcastle Institute for Energy and Resources
- The University of Newcastle
- Callaghan
- Australia
| |
Collapse
|