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Dias G, Rocca L, Ferrari HZ, Bernard FL, Brandão FG, Pereira L, Einloft S. Cationic Imidazolium-Urethane-Based Poly(Ionic Liquids) Membranes for Enhanced CO 2/CH 4 Separation: Synthesis, Characterization, and Performance Evaluation. MEMBRANES 2024; 14:151. [PMID: 39057659 PMCID: PMC11279342 DOI: 10.3390/membranes14070151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/02/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024]
Abstract
The escalating emissions of CO2 into the atmosphere require the urgent development of technologies aimed at mitigating environmental impacts. Among these, aqueous amine solutions and polymeric membranes, such as cellulose acetate and polyimide are commercial technologies requiring improvement or substitution to enhance the economic and energetic efficiency of CO2 separation processes. Ionic liquids and poly(ionic liquids) (PILs) are candidates to replace conventional CO2 separation technologies. PILs are a class of materials capable of combining the favorable gas affinity exhibited by ionic liquids (ILs) with the processability inherent in polymeric materials. In this context, the synthesis of the IL GLYMIM[Cl] was performed, followed by ion exchange processes to achieve GLYMIM variants with diverse counter anions (NTf2-, PF6-, and BF4). Subsequently, PIL membranes were fabricated from these tailored ILs and subjected to characterization, employing techniques such as SEC, FTIR, DSC, TGA, DMA, FEG-SEM, and CO2 sorption analysis using the pressure decay method. Furthermore, permeability and ideal selectivity assessments of CO2/CH4 mixture were performed to derive the diffusion and solubility coefficients for both CO2 and CH4. PIL membranes exhibited adequate thermal and mechanical properties. The PIL-BF4 demonstrated CO2 sorption capacities of 33.5 mg CO2/g at 1 bar and 104.8 mg CO2/g at 10 bar. Furthermore, the PIL-BF4 membrane exhibited permeability and ideal (CO2/CH4) selectivity values of 41 barrer and 44, respectively, surpassing those of a commercial cellulose acetate membrane as reported in the existing literature. This study underscores the potential of PIL-based membranes as promising candidates for enhanced CO2 capture technologies.
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Affiliation(s)
- Guilherme Dias
- School of Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90619-900, RS, Brazil; (G.D.); (L.R.); (H.Z.F.); (F.L.B.)
- Post-Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90619-900, RS, Brazil
| | - Laura Rocca
- School of Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90619-900, RS, Brazil; (G.D.); (L.R.); (H.Z.F.); (F.L.B.)
| | - Henrique Z. Ferrari
- School of Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90619-900, RS, Brazil; (G.D.); (L.R.); (H.Z.F.); (F.L.B.)
- Post-Graduation Program in Materials Engineering and Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90619-900, RS, Brazil
| | - Franciele L. Bernard
- School of Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90619-900, RS, Brazil; (G.D.); (L.R.); (H.Z.F.); (F.L.B.)
| | - Fernando G. Brandão
- Petrobras/CENPES, Ilha do Fundão Qd. 07, Rio de Janeiro 21941-915, RJ, Brazil; (F.G.B.); (L.P.)
| | - Leonardo Pereira
- Petrobras/CENPES, Ilha do Fundão Qd. 07, Rio de Janeiro 21941-915, RJ, Brazil; (F.G.B.); (L.P.)
| | - Sandra Einloft
- School of Technology, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre 90619-900, RS, Brazil; (G.D.); (L.R.); (H.Z.F.); (F.L.B.)
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Qu Y, McGiffin D, Sanchez LD, Gengenbach T, Easton C, Thissen H, Peleg AY. Anti-infective characteristics of a new Carbothane ventricular assist device driveline. Biofilm 2023; 5:100124. [PMID: 37153749 PMCID: PMC10154736 DOI: 10.1016/j.bioflm.2023.100124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 04/10/2023] [Accepted: 04/15/2023] [Indexed: 05/10/2023] Open
Abstract
Objectives Driveline infections are a major complication of ventricular assist device (VAD) therapy. A newly introduced Carbothane driveline has preliminarily demonstrated anti-infective potential against driveline infections. This study aimed to comprehensively assess the anti-biofilm capability of the Carbothane driveline and explore its physicochemical characteristics. Methods We assessed the Carbothane driveline against biofilm formation of leading microorganisms causing VAD driveline infections, including Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa and Candida albicans, using novel in vitro biofilm assays mimicking different infection micro-environments. The importance of physicochemical properties of the Carbothane driveline in microorganism-device interactions were analyzed, particularly focusing on the surface chemistry. The role of micro-gaps in driveline tunnels on biofilm migration was also examined. Results All organisms were able to attach to the smooth and velour sections of the Carbothane driveline. Early microbial adherence, at least for S. aureus and S. epidermidis, did not proceed to the formation of mature biofilms in a drip-flow biofilm reactor mimicking the driveline exit site environment. The presence of a driveline tunnel however, promoted staphylococcal biofilm formation on the Carbothane driveline. Physicochemical analysis of the Carbothane driveline revealed surface characteristics that may have contributed to its anti-biofilm activity, such as the aliphatic nature of its surface. The presence of micro-gaps in the tunnel facilitated biofilm migration of the studied bacterial species. Conclusion This study provides experimental evidence to support the anti-biofilm activity of the Carbothane driveline and uncovered specific physicochemical features that may explain its ability to inhibit biofilm formation.
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Affiliation(s)
- Yue Qu
- Infection Program, Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, 3800, Australia
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, Victoria, 3004, Australia
| | - David McGiffin
- Department of Cardiothoracic Surgery, The Alfred and Monash University, Melbourne, Victoria, 3004, Australia
| | - Lina Duque Sanchez
- Commonwealth Scientific and Industrial Research Organization (CSIRO) Manufacturing, Clayton, Victoria, 3168, Australia
- Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Parkville, Victoria, 3052, Australia
| | - Thomas Gengenbach
- Commonwealth Scientific and Industrial Research Organization (CSIRO) Manufacturing, Clayton, Victoria, 3168, Australia
| | - Chris Easton
- Commonwealth Scientific and Industrial Research Organization (CSIRO) Manufacturing, Clayton, Victoria, 3168, Australia
| | - Helmut Thissen
- Commonwealth Scientific and Industrial Research Organization (CSIRO) Manufacturing, Clayton, Victoria, 3168, Australia
| | - Anton Y. Peleg
- Infection Program, Monash Biomedicine Discovery Institute, Department of Microbiology, Monash University, Clayton, Victoria, 3800, Australia
- Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, Victoria, 3004, Australia
- Corresponding author. Department of Infectious Diseases, The Alfred Hospital and Central Clinical School, Monash University, Melbourne, Australia.
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Nituica M, Oprea O, Stelescu MD, Sonmez M, Georgescu M, Alexandrescu L, Motelica L. Polymeric Biocomposite Based on Thermoplastic Polyurethane (TPU) and Protein and Elastomeric Waste Mixture. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5279. [PMID: 37569981 PMCID: PMC10419917 DOI: 10.3390/ma16155279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 08/13/2023]
Abstract
Polymeric biocomposites based on TPU/recycled TPUW/mixed leather and SBR rubber waste unmodified/modified with polydimethylsiloxane/PE-g-MA in different percentages were made via the mixing technique on a Plasti-Corder Brabender mixer with an internal capacity of 350 cm3. The waste, which came from the shoe industry, was cryogenically ground with the help of a cryogenic cyclone mill at micrometric sizes and different speeds. For the tests, standard plates of 150 × 150 × 2 mm were obtained in a laboratory-scale hydraulic press via the method of compression between its plates, with well-established parameters. The biocomposites were tested physico-mechanically and rheologically (MFI) according to the standards in force on polymer-specific equipment, also via FT-IR spectroscopy and microscopy, as well as via differential scanning calorimetry-DSC. Following the tests carried out, according to the standard for use in the footwear industry, at least two samples present optimal values (of interest) suitable for use in the footwear industry by injection or pressing in forming moulds.
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Affiliation(s)
- Mihaela Nituica
- National Research and Development Institute for Textile and Leather, Division Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania; (M.N.); (M.D.S.); (M.S.); (M.G.); (L.A.)
| | - Ovidiu Oprea
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gheorghe Polizu Streert, 011061 Bucharest, Romania;
- Academy of Romanian Scientists, Ilfov Street 3, 050044 Bucharest, Romania
| | - Maria Daniela Stelescu
- National Research and Development Institute for Textile and Leather, Division Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania; (M.N.); (M.D.S.); (M.S.); (M.G.); (L.A.)
| | - Maria Sonmez
- National Research and Development Institute for Textile and Leather, Division Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania; (M.N.); (M.D.S.); (M.S.); (M.G.); (L.A.)
| | - Mihai Georgescu
- National Research and Development Institute for Textile and Leather, Division Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania; (M.N.); (M.D.S.); (M.S.); (M.G.); (L.A.)
| | - Laurentia Alexandrescu
- National Research and Development Institute for Textile and Leather, Division Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania; (M.N.); (M.D.S.); (M.S.); (M.G.); (L.A.)
| | - Ludmila Motelica
- Faculty of Chemical Engineering and Biotechnologies, University Politehnica of Bucharest, 1-7 Gheorghe Polizu Streert, 011061 Bucharest, Romania;
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Rogulska M. The Influence of Diisocyanate Structure on Thermal Stability of Thermoplastic Polyurethane Elastomers Based on Diphenylmethane-Derivative Chain Extender with Sulfur Atoms. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2618. [PMID: 37048910 PMCID: PMC10096118 DOI: 10.3390/ma16072618] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/16/2023] [Accepted: 03/23/2023] [Indexed: 06/19/2023]
Abstract
The work is a continuation of the research on thermoplastic polyurethane (TPU) elastomers containing sulfur atoms which are incorporated into the polyurethane chain using aliphatic-aromatic chain extenders. These materials show some improved properties in relation to conventional ones, e.g., adhesion to metals, bacterial resistance and refractive index. The present study deals with the detailed characteristics of the process of thermal decomposition of TPU elastomers obtained from 2,2'-[methylenebis(1,4-phenylenemethylenethio)]diethanol, 1,1'-methanediylbis(4-isocyanatobenzene) (MDI) or 1,6-diisocyanatohexane (HDI) and poly(oxytetramethylene) diol of Mn = 2000 g/mol by thermogravimetric analysis coupled on-line with Fourier transform infrared spectroscopy. The analysis was performed under inert and oxidative conditions. All TPU elastomers were found to have a relatively good thermal stability, with those based on aromatic diisocyanate being at an advantage. In helium, they are stable up to 280-282 °C (from HDI) and 299-301 °C (from MDI), whereas in synthetic air up to 252-265 °C (from HDI) and 261-272 °C (from MDI), as measured by the temperature of 1% mass loss. Depending on the content of the hard segments and the tested atmosphere, the TPU elastomers decompose from one to four stages. From the analysis of the volatile decomposition products, it follows that the decomposition of both types of hard segments was accompanied by the evolution of carbonyl sulfide, carbon dioxide, water, sulfide dioxide, alcohols and aromatic compounds. For the hard segment derived from HDI, isocyanates, amines, and unsaturated compounds were also identified, while for the MDI-derived one, aldehydes were discovered. In turn, the polyether soft segment decomposed mainly into aliphatic ethers, aldehydes, and carbon monoxide.
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Affiliation(s)
- Magdalena Rogulska
- Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, Gliniana 33, 20-614 Lublin, Poland
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Research on the cyclic compression performance of polycarbonate-based thermoplastic polyurethane foams prepared by microcellular foaming. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Ernzen JR, Romoaldo CH, Gommes C, Covas JA, Marcos-Fernández A, Fiorio R, Bianchi O. Tuning Thermal, Morphological, and Physicochemical Properties of Thermoplastic Polyurethanes (TPUs) by the 1,4-Butanediol (BDO)/Dipropylene Glycol (DPG) Ratio. Polymers (Basel) 2022; 14:polym14153164. [PMID: 35956679 PMCID: PMC9371192 DOI: 10.3390/polym14153164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/27/2022] [Accepted: 07/30/2022] [Indexed: 11/16/2022] Open
Abstract
Thermoplastic polyurethanes (TPUs) are versatile polymers presenting a broad range of properties as a result of their countless combination of raw materials—in essence, isocyanates, polyols, and chain extenders. This study highlights the effect of two different chain extenders and their combination on the structure−property relationships of TPUs synthesized by reactive extrusion. The TPUs were obtained from 4,4-diphenylmethane diisocyanate (MDI), polyester diols, and the chain extenders 1,4-butanediol (BDO) and dipropylene glycol (DPG). The BDO/DPG ratios studied were 100/0, 75/25, 50/50, 25/75, and 0/100 wt.%. The TPUs were characterized by size exclusion chromatography (SEC), Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), small-angle X-ray scattering (SAXS), UV−vis spectroscopy, and physical-mechanical properties. The results indicate that DPG promotes compatibility between rigid (HS) and flexible (SS) segments of TPUs. Consequently, increasing DPG content (>75 wt.%) reduced the organization of the rigid segments and the degree of phase separation, increasing the polydispersity of the interdomain distance and the transparency in the UV−visible spectrum of the TPUs. Furthermore, increasing DPG content also reduced the amount of hydrogen bonds present in the rigid phase, reducing or extinguishing its glass transition temperature (TgHS) and melting temperature (Tm), and increasing the glass transition temperature of the flexible phase (TgSS). Therefore, increasing DPG content leads to a deterioration in mechanical properties and hydrolysis resistance.
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Affiliation(s)
- Juliano R. Ernzen
- Mantoflex Poliuretanos, Caxias do Sul 95045175, Brazil;
- Chemical Engineering Department, University of Caxias do Sul, Caxias do Sul 95070560, Brazil;
| | - Carlos H. Romoaldo
- Chemical Engineering Department, University of Caxias do Sul, Caxias do Sul 95070560, Brazil;
| | - Cedric Gommes
- Department of Chemical Engineering, University of Liège, B6C, Allée du Six Août 3, B-4000 Liège, Belgium;
| | - José A. Covas
- Institute for Polymers and Composites (IPC), University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal;
| | - Angel Marcos-Fernández
- Elastomers Group, Institute of Polymer Science and Technology (ICTP-CSIC), Juan de la Cierva, 3, 28006 Madrid, Spain
- Correspondence: (A.M.-F.); (O.B.)
| | - Rudinei Fiorio
- Faculty of Science and Engineering, Maastricht University, 6200 MD Geleen, The Netherlands;
| | - Otávio Bianchi
- Chemical Engineering Department, University of Caxias do Sul, Caxias do Sul 95070560, Brazil;
- Department of Materials Engineering (DEMAT), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre 90040040, Brazil
- Correspondence: (A.M.-F.); (O.B.)
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Puszka A, Sikora JW. Synthesis and Characterization of New Polycarbonate-Based Poly(thiourethane-urethane)s. Polymers (Basel) 2022; 14:polym14142933. [PMID: 35890709 PMCID: PMC9323315 DOI: 10.3390/polym14142933] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/12/2022] [Accepted: 07/18/2022] [Indexed: 02/06/2023] Open
Abstract
The new segmented poly(thiourethane-urethane)s (PTURs) based on 1,1′-methanediylbis(4-isocyanatocyclohexane) (HMDI, Desmodur W®), polycarbonate diol (PCD, Desmophen C2200) and (methanediyldibenzene-4,1-diyl)dimethanethiol were synthesized by one-step melt polyaddition method. The obtained PTURs, with a content of 30–60 wt% of the hard segments (HS), were tested in which the influence of changes in the HS content on their properties was determined. The polymers were characterized by Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), thermal analysis (DSC, TGA) and thermomechanical analysis (DMTA). Additionally, tensile strength, optical (refractive index, UV-VIS and color) and surface properties of the obtained polymers (contact angle and surface free energy) and adhesion to copper were examined. FTIR analysis verified the supposed structure of the polymers obtained and showed a complete conversion of the isocyanate groups. TGA analysis confirmed the relatively good thermal stability of the polymers. On the other hand, after performing the DSC analysis, it was possible to state that the obtained materials were partially or completely amorphous, and the microphase separation decreased with increasing HS content in the polymer. Similar observations were made from the DMTA data. In addition, the hardness, tensile strength, modulus of elasticity, storage modulus, adhesion to copper, refractive index and total free surface energy increased with increasing HS content in the polymer.
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Affiliation(s)
- Andrzej Puszka
- Department of Polymer Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University in Lublin, Gliniana 33, 20-614 Lublin, Poland
- Correspondence:
| | - Janusz W. Sikora
- Department of Technology and Polymer Processing, Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland;
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Geng Y, Wang M, Li W, Yi P, Ji Y, Stewart C, Yang Y, Liu F. The reinforcing effect of cyclic binary secondary amine chain extenders on the cryogenic performance of thermoplastic polyurethane elastomers. J Appl Polym Sci 2022. [DOI: 10.1002/app.52500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yanfei Geng
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou China
| | - Meng Wang
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou China
| | - Wenke Li
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou China
| | - Pengcheng Yi
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou China
| | - Yumei Ji
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou China
| | - Callum Stewart
- Ming Wai Lau Centre for Reparative Medicine Karolinska Institute Hong Kong China
| | - Yike Yang
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou China
- Ming Wai Lau Centre for Reparative Medicine Karolinska Institute Hong Kong China
| | - Feng Liu
- College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou China
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Manhas P, Saini R, Singh A, Soni P, Sharma RK. Thermoplastic polyurethane-based nanoencapsulation strategy for efficient storage and stability of RDX. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118076] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Surface, structural, and thermal properties of polydimethylsiloxane-based polyurethanes and their blends with thermoplastic polyurethane elastomer. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-04010-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Xi T, Lu Y, Ai X, Tang L, Yao L, Hao W, Cui P. Ionic liquid copolymerized polyurethane membranes for pervaporation separation of benzene/cyclohexane mixtures. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121948] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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