1
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Zhao Z, Sun Z, Lv W, Sun C, Zhang Z. Preparation of graphene/carbon nanotube-cellulose composites assisted by ionic liquids: A review. Int J Biol Macromol 2024; 276:133927. [PMID: 39025191 DOI: 10.1016/j.ijbiomac.2024.133927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 07/06/2024] [Accepted: 07/15/2024] [Indexed: 07/20/2024]
Abstract
As is well known, cellulose, as a natural polymer material with abundant reserves, plays an irreplaceable role as the major raw material in energy and chemical-related fields. With the continuous advancement of technology, native single-component cellulose is often unsatisfactory for practical applications, constructing composites is an effective means of expanding the applications. When compounded with other ingredients to prepare composites, cellulose usually needs to be dissolved and regenerated to obtain good dispersion. Current studies have revealed that cellulose is insoluble in conventional solvents, and the limited types of solvent systems that can dissolve cellulose tend to degrade the cellulose during the dissolution process, altering the cellulose properties. Ionic liquids (ILs) are a class of solvents that are capable of dissolving cellulose without adversely affecting the cellulose during the dissolution process, such as degradation. Graphene and carbon nanotubes (CNTs) are poorly dispersed and easily agglomerated by π-π stacking in general solvents, whereas ILs can effectively shield them from π-π stacking, resulting in a favorable and steady dispersion. Thus, the cellulose composites of graphene/CNTs can be prepared with the assistance of ILs. In this paper, the solubilization of cellulose by ILs and the solubilization mechanism to the preparation of cellulose composites with graphene/CNTs are reviewed, the interactions between graphene, CNTs and cellulose in the composites are elucidated, and the preparation of cellulose composites with graphene/CNTs is introduced in terms of their structure, properties and application potential.
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Affiliation(s)
- Zexi Zhao
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China
| | - Zeying Sun
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China
| | - Wenfeng Lv
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China
| | - Caiying Sun
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China.
| | - Zhiyong Zhang
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China.
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2
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Wei J, Long Y, Li T, Gao H, Nie Y. Exploring hydrogen-bond structures in cellulose during regeneration with anti-solvent through two-dimensional correlation infrared spectroscopy. Int J Biol Macromol 2024; 267:131204. [PMID: 38556242 DOI: 10.1016/j.ijbiomac.2024.131204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/16/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
Cellulose, renowned for its excellent biocompatibility, finds extensive applications in both industrial and laboratory settings. However, few studies have specifically addressed the mechanistic evolution of hydrogen bond networks in cellulose during the dissolution and regeneration processes. In this research, the regeneration mechanism of cellulose in water and ethanol is investigated through molecular dynamics simulations. The results indicate that the ability of water molecules to disrupt hydrogen bonds between cellulose and ionic liquids is stronger than that of ethanol, which is more conducive to promoting the regeneration of cellulose. Besides, the Fourier transform infrared spectroscopy coupled with two-dimensional correlation infrared spectroscopy techniques are employed to unveil the evolution sequence of hydrogen bonds during dissolution and regeneration: ν(OH) (absorbed water) → ν(O3-H3···O5) (intrachain) → ν(O6-H6···O3') (interchain) → ν(O2-H2···O6) (intrachain) → ν(OH) (free). This study not only enhances our understanding of the intricate hydrogen bond dynamics in cellulose dissolution and regeneration but also provides a foundation for the expanded application of cellulose in diverse fields.
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Affiliation(s)
- Jia Wei
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan Long
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450000, China; School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Tiancheng Li
- Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450000, China
| | - Hongshuai Gao
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450000, China.
| | - Yi Nie
- Beijing Key Laboratory of Ionic Liquids Clean Process, CAS State Key Laboratory of Mesoscience and Engineering, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Zhengzhou Institute of Emerging Industrial Technology, Zhengzhou 450000, China.
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3
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Khoo YS, Tjong TC, Chew JW, Hu X. Techniques for recovery and recycling of ionic liquids: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 922:171238. [PMID: 38423336 DOI: 10.1016/j.scitotenv.2024.171238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 02/16/2024] [Accepted: 02/22/2024] [Indexed: 03/02/2024]
Abstract
Due to beneficial properties like non-flammability, thermal stability, low melting point and low vapor pressure, ionic liquids (ILs) have gained great interest from engineers and researchers in the past decades to replace conventional solvents. The superior characteristics of ILs make them promising for applications in fields as wide-ranging as pharmaceuticals, foods, nanoparticles synthesis, catalysis, electrochemistry and so on. To alleviate the high cost and environmental impact of ILs, various technologies have been reported to recover and purify the used ILs, as well as recycling the ILs. The aim of this article is to overview the state-of-the-art research on the recovery and recycling technologies for ILs including membrane technology, distillation, extraction, aqueous two-phase system (ATPS) and adsorption. In addition, challenges and future perspectives on ILs recovery are discussed. This review is expected to provide valuable insights for developing effective and environmentally friendly recovery methods for ILs.
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Affiliation(s)
- Ying Siew Khoo
- School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Ave, Block N4.1, 639798, Singapore; RGE-NTU Sustainable Textile Research Centre, Nanyang Technological University (NTU), 639798, Singapore
| | - Tommy Chandra Tjong
- School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Ave, Block N4.1, 639798, Singapore; RGE-NTU Sustainable Textile Research Centre, Nanyang Technological University (NTU), 639798, Singapore
| | - Jia Wei Chew
- RGE-NTU Sustainable Textile Research Centre, Nanyang Technological University (NTU), 639798, Singapore; School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University (NTU), 62 Nanyang Drive, 637459, Singapore; Chemical Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden.
| | - Xiao Hu
- School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Ave, Block N4.1, 639798, Singapore; RGE-NTU Sustainable Textile Research Centre, Nanyang Technological University (NTU), 639798, Singapore.
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4
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Zhao Z, Li H, Gao X. Microwave Encounters Ionic Liquid: Synergistic Mechanism, Synthesis and Emerging Applications. Chem Rev 2024; 124:2651-2698. [PMID: 38157216 DOI: 10.1021/acs.chemrev.3c00794] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
Progress in microwave (MW) energy application technology has stimulated remarkable advances in manufacturing and high-quality applications of ionic liquids (ILs) that are generally used as novel media in chemical engineering. This Review focuses on an emerging technology via the combination of MW energy and the usage of ILs, termed microwave-assisted ionic liquid (MAIL) technology. In comparison to conventional routes that rely on heat transfer through media, the contactless and unique MW heating exploits the electromagnetic wave-ions interactions to deliver energy to IL molecules, accelerating the process of material synthesis, catalytic reactions, and so on. In addition to the inherent advantages of ILs, including outstanding solubility, and well-tuned thermophysical properties, MAIL technology has exhibited great potential in process intensification to meet the requirement of efficient, economic chemical production. Here we start with an introduction to principles of MW heating, highlighting fundamental mechanisms of MW induced process intensification based on ILs. Next, the synergies of MW energy and ILs employed in materials synthesis, as well as their merits, are documented. The emerging applications of MAIL technologies are summarized in the next sections, involving tumor therapy, organic catalysis, separations, and bioconversions. Finally, the current challenges and future opportunities of this emerging technology are discussed.
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Affiliation(s)
- Zhenyu Zhao
- School of Chemical Engineering and Technology, National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
| | - Hong Li
- School of Chemical Engineering and Technology, National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
| | - Xin Gao
- School of Chemical Engineering and Technology, National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
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5
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Roos E, Sebastiani D, Brehm M. BILFF: All-Atom Force Field for Modeling Triazolium- and Benzoate-Based Ionic Liquids. Molecules 2023; 28:7592. [PMID: 38005314 PMCID: PMC10674667 DOI: 10.3390/molecules28227592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/05/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
We present an extension of our previously developed all-atom force field BILFF (Bio-polymers in Ionic Liquids Force Field) to three different ionic liquids: 1-ethyl-3-methyl-1,2,3-triazolium acetate ([EMTr][OAc]), 1-ethyl-3-methyl-1,2,3-triazolium benzoate ([EMTr][OBz]), and 1-ethyl-3-methylimidazolium benzoate ([EMIm][OBz]). These ionic liquids are of practical importance as they have the ability to dissolve significant amounts of cellulose even at room temperature. Our force field is optimized to accurately reproduce the strong hydrogen bonding in the system with nearly quantum chemical accuracy. A very good agreement between the microstructure of the quantum chemical simulations over a wide temperature range and experimental density data with the results of BILFF were observed. Non-trivial effects, such as the solvation shell structure and π-π stacking of the cations, are also accurately reproduced. Our force field enables accurate simulations of larger systems, such as solvated cellulose in different (aqueous) ionic liquids, and is the first to present the optimized parameters for mixtures of these solvents and water.
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Affiliation(s)
- Eliane Roos
- Institut für Chemie—Theoretische Chemie, Martin-Luther-Universität Halle–Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany; (E.R.); (D.S.)
| | - Daniel Sebastiani
- Institut für Chemie—Theoretische Chemie, Martin-Luther-Universität Halle–Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany; (E.R.); (D.S.)
| | - Martin Brehm
- Institut für Chemie—Theoretische Chemie, Martin-Luther-Universität Halle–Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany; (E.R.); (D.S.)
- Department Chemie, Universität Paderborn, Warburger Straße 100, 33098 Paderborn, Germany
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6
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Roos E, Sebastiani D, Brehm M. A force field for bio-polymers in ionic liquids (BILFF) - part 2: cellulose in [EMIm][OAc]/water mixtures. Phys Chem Chem Phys 2023; 25:8755-8766. [PMID: 36897117 DOI: 10.1039/d2cp05636d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
We present the extension of our force field BILFF (Bio-Polymers in Ionic Liquids Force Field) to the bio-polymer cellulose. We already published BILFF parameters for mixtures of ionic liquid 1-ethyl-3-methylimidazolium acetate ([EMIm][OAc]) with water. Our all-atom force field focuses on a quantitative reproduction of the hydrogen bonds in the complex mixture of cellulose, [EMIm]+, [OAc]- and water when compared to reference ab initio molecular dynamics (AIMD) simulations. To enhance the sampling, 50 individual AIMD simulations starting from different initial configurations were performed for cellulose in solvent instead of one long simulation, and the resulting averages were used for force field optimization. All cellulose force field parameters were iteratively adjusted starting from the literature force field of W. Damm et al. We were able to obtain a very good agreement with respect to both the microstructure of the reference AIMD simulations and experimental results such as the system density (even at higher temperatures) and the crystal structure. Our new force field allows performing very long simulations of large systems containing cellulose solvated in (aqueous) [EMIm][OAc] with almost ab initio accuracy.
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Affiliation(s)
- Eliane Roos
- Institut für Chemie - Theoretische Chemie, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
| | - Daniel Sebastiani
- Institut für Chemie - Theoretische Chemie, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
| | - Martin Brehm
- Institut für Chemie - Theoretische Chemie, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
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7
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Radicke J, Roos E, Sebastiani D, Brehm M, Kressler J. Lactate‐based ionic liquids as chiral solvents for cellulose. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20220687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Julian Radicke
- Department of Chemistry Martin Luther University Halle–Wittenberg Halle (Saale) Germany
| | - Eliane Roos
- Department of Chemistry Martin Luther University Halle–Wittenberg Halle (Saale) Germany
| | - Daniel Sebastiani
- Department of Chemistry Martin Luther University Halle–Wittenberg Halle (Saale) Germany
| | - Martin Brehm
- Department of Chemistry Martin Luther University Halle–Wittenberg Halle (Saale) Germany
| | - Jörg Kressler
- Department of Chemistry Martin Luther University Halle–Wittenberg Halle (Saale) Germany
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8
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Quintana AA, Sztapka AM, Santos Ebinuma VDC, Agatemor C. Enabling Sustainable Chemistry with Ionic Liquids and Deep Eutectic Solvents: A Fad or the Future? Angew Chem Int Ed Engl 2022; 61:e202205609. [PMID: 35789078 DOI: 10.1002/anie.202205609] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Indexed: 12/17/2022]
Abstract
Ionic liquids (ILs) and deep eutectic solvents (DESs) debuted with a promise of a superior sustainability footprint due to their low vapor pressure. However, their toxicity and high cost compromise this footprint, impeding their real-world applications. Fortunately, their property tunability through a rational selection of precursors, including bioderived ones, provides a strategy to ameliorate toxicity, lower cost, and endow new functions. This Review discusses whether ILs and DESs are sustainable solvents and how they contribute to sustainable chemical processes.
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Affiliation(s)
| | | | - Valéria de Carvalho Santos Ebinuma
- Department of Engineering of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Christian Agatemor
- Department of Chemistry, University of Miami, Coral Gables, FL 33124, USA.,Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL 33136, USA
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9
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Xu KJ, Zhang BQ, Qiao X, Liu CY. Cellulose Solubility in Deep Eutectic Solvents: Inspecting Quantitative Hydrogen-Bonding Analysis. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2801-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Agatemor C, Quintana AA, Sztapka LM, Ebinuma VDCS. Enabling Sustainable Chemistry with Ionic Liquids and Deep Eutectic Solvents: a Fad or the Future? Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Christian Agatemor
- University of Miami - Coral Gables Campus: University of Miami Chemistry 1301 Memorial Dr 33146 Coral Gables UNITED STATES
| | - Aline Andrea Quintana
- University of Miami - Coral Gables Campus: University of Miami Chemistry UNITED STATES
| | - Lani Maria Sztapka
- University of Miami - Coral Gables Campus: University of Miami Chemistry UNITED STATES
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11
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Super-rapid and highly-efficient esterification of cellulose to achieve an accurate chromatographic analysis of its molecular weight. Carbohydr Polym 2022; 286:119301. [DOI: 10.1016/j.carbpol.2022.119301] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/05/2022] [Accepted: 02/25/2022] [Indexed: 11/23/2022]
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12
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13
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Zhang H, Ionita A, Seriñan PF, Ferrer ML, Rodríguez MA, Tamayo A, Rubio Alons F, del Monte F, Gutiérrez MC. Easy and Efficient Recovery of EMIMCl from Cellulose Solutions by Addition of Acetic Acid and the Transition from the Original Ionic Liquid to an Eutectic Mixture. Molecules 2022; 27:987. [PMID: 35164255 PMCID: PMC8840234 DOI: 10.3390/molecules27030987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/21/2022] [Accepted: 01/24/2022] [Indexed: 11/16/2022] Open
Abstract
Ionic liquids (ILs) and deep eutectic solvents (DESs) are the two most widely used neoteric solvents. Recently, our group described how the simple addition of acetic acid (AcOH) to 1-Ethyl-3-methylimidazolium chloride (EMIMCl) could promote the transition from the original IL to an eutectic mixture of EMIMCl and AcOH. Herein, we studied how cellulose regeneration and EMIMCl recovery from EMIMCl solutions of cellulose could be benefited by the significant differences existing between EMIMCl- and EMIMCl·AcOH-based mixtures and the easy switching from one to the other. Finally, we also demonstrated that the transition could also be accomplished by addition of acetic anhydride and water so that the process could be eventually useful for the achievement of highly acetylated cellulose.
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Affiliation(s)
- Huan Zhang
- Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (H.Z.); (A.I.); (P.F.S.); (F.d.M.)
| | - Andreea Ionita
- Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (H.Z.); (A.I.); (P.F.S.); (F.d.M.)
| | - Pilar F. Seriñan
- Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (H.Z.); (A.I.); (P.F.S.); (F.d.M.)
| | - María Luisa Ferrer
- Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (H.Z.); (A.I.); (P.F.S.); (F.d.M.)
| | - María A. Rodríguez
- Area de Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Extremadura, 06006 Badajoz, Spain;
| | - Aitana Tamayo
- Instituto de Cerámica y Vidrio-ICV, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (A.T.); (F.R.A.)
| | - Fausto Rubio Alons
- Instituto de Cerámica y Vidrio-ICV, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (A.T.); (F.R.A.)
| | - Francisco del Monte
- Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (H.Z.); (A.I.); (P.F.S.); (F.d.M.)
| | - María C. Gutiérrez
- Instituto de Ciencia de Materiales de Madrid-ICMM, Consejo Superior de Investigaciones Científicas-CSIC, Campus de Cantoblanco, 28049 Madrid, Spain; (H.Z.); (A.I.); (P.F.S.); (F.d.M.)
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14
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Galamba J, Alves VD, Jordão N, Neves LA. Development of cellulose-based polymeric structures using dual functional ionic liquids. RSC Adv 2021; 11:39278-39286. [PMID: 35492502 PMCID: PMC9044494 DOI: 10.1039/d1ra03204f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 10/17/2021] [Indexed: 12/15/2022] Open
Abstract
Carboxylate ionic liquids (ILs) combining benzethonium (BE) and didecyldimethylammonium (DDA) as cations have been explored to be used for the first time as dual functional solvents for microcrystalline cellulose (MCC) dissolution and, subsequently development of polymeric structures. Considering that some ILs can remain in the polymeric structures after phase inversion, these ILs can offer advantages such as antibacterial/antimicrobial response and ability to disrupt H-bonds. In this context, all tested ILs have been able to dissolve MCC up to a concentration of 4% (w/w), resulting in different polymeric structures, such as gel-like or films, depending on the type of IL and the ratio between MCC and IL. Furthermore, FTIR spectroscopy showed that some IL remains in the polymeric structures, which can enhance their application in the biomedical field.
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Affiliation(s)
- Joana Galamba
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade Nova de Lisboa 2829-516 Caparica Portugal
| | - Vítor D Alves
- LEAF, Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa Tapada da Ajuda 1349-017 Lisboa Portugal
| | - Noémi Jordão
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade Nova de Lisboa 2829-516 Caparica Portugal
| | - Luísa A Neves
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade Nova de Lisboa 2829-516 Caparica Portugal
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15
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Hawkins JE, Liang Y, Ries ME, Hine PJ. Time temperature superposition of the dissolution of cellulose fibres by the ionic liquid 1-ethyl-3-methylimidazolium acetate with cosolvent dimethyl sulfoxide. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2020.100021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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16
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Alizadeh V, Kirchner B. Molecular level insight into the solvation of cellulose in deep eutectic solvents. J Chem Phys 2021; 155:084501. [PMID: 34470350 DOI: 10.1063/5.0058333] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Deep eutectic solvents as sustainable and new-generation solvents show potential in the field of cellulose dissolution. Although these novel materials are tested for numerous industrial, environmental, and medical applications, little is known about the structural features of cellulose interacting with deep eutectic solvents. In this work, the interplay of cellulose is studied in two deep eutectic solvents: choline acetate mixed with urea and choline chloride mixed with urea using classical molecular dynamics simulations. Dissolution of cellulose in the studied liquids was not observed to be in agreement with experimental work from the literature. However, a slight swelling in the chloride, as compared to the acetate-based solvent, is apparent. A possible rationale might be found in the stronger hydrogen bonding of the chloride anion compared to the acetate anion with the hydrogen atoms of the cellulose. Moreover, chloride approaches the outer glucose units comparatively more, which could be interpreted as the onset of entering and thus dissolving the cellulose as was previously observed. Specific hydrogen bonds between all units are analyzed and discussed in detail.
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Affiliation(s)
- Vahideh Alizadeh
- Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstraße 4+6, D-53115 Bonn, Germany
| | - Barbara Kirchner
- Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstraße 4+6, D-53115 Bonn, Germany
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17
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Lefroy KS, Murray BS, Ries ME. Rheological and NMR Studies of Cellulose Dissolution in the Ionic Liquid BmimAc. J Phys Chem B 2021; 125:8205-8218. [PMID: 34279933 DOI: 10.1021/acs.jpcb.1c02848] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Solutions of two types of cellulose in the ionic liquid 1-butyl-3-methyl-imidazolium acetate (BmimAc) have been analyzed using rheology and fast-field cycling nuclear magnetic resonance (NMR) spectroscopy, in order to analyze the macroscopic (bulk) and microscopic environments, respectively. The degree of polymerization (DP) was observed to have a significant effect on both the overlap (c*) and entanglement (ce) concentrations and the intrinsic viscosity ([η]). For microcrystalline cellulose (MCC)/BmimAc solutions, [η] = 116 mL g-1, which is comparable to that of MCC/1-ethyl-3-methyl-imidazolium acetate (EmimAc) solutions, while [η] = 350 mL g-1 for the commercial cellulose (higher DP). Self-diffusion coefficients (D) obtained via the model-independent approach were found to decrease with cellulose concentration and increase with temperature, which can in part be explained by the changes in viscosity; however, ion interactions on a local level are also important. Both Stokes-Einstein and Stokes-Einstein-Debye analyses were carried out to directly compare rheological and relaxometry analyses. It was found that polymer entanglements affect the microscopic environment to a much lesser extent than for the macroscopic environment. Finally, the temperature dependencies of η, D, and relaxation time (T1) could be well described by Arrhenius relationships, and thus, activation energies (Ea) for flow, diffusion, and relaxation were determined. We demonstrate that temperature and cellulose concentration have different effects on short- and long-range interactions.
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Affiliation(s)
- Katherine S Lefroy
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, U.K
| | - Brent S Murray
- School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, U.K
| | - Michael E Ries
- School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
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Roos E, Brehm M. A force field for bio-polymers in ionic liquids (BILFF) - part 1: [EMIm][OAc]/water mixtures. Phys Chem Chem Phys 2021; 23:1242-1253. [PMID: 33355320 DOI: 10.1039/d0cp04537c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present BILFF, a novel force field for bio-polymers in ionic liquids. In the first part of our study, we introduce optimized force field parameters for mixtures of the ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate ([EMIm][OAc]) with water. This imidazolium-based IL is of particular practical importance as it can dissolve significant amounts of cellulose even at room temperature. An understanding of this dissolution process via molecular dynamics simulations requires a quantitative description of the microscopic structure and the strong hydrogen bonds with a method able of simulating at least several dozen nanoseconds, which is the main aim of our novel force field. To reach this goal, we optimize the force field parameters to reproduce radial, spatial, and combined distribution functions, hydrogen bond lifetimes, diffusion coefficients, and several other quantities from reference ab initio molecular dynamics (AIMD) simulations. Non-trivial effects such as dispersion interactions between the side chains and π-π stacking of the cations are reproduced very well. We further validate the force field by comparison to experimental data such as thermal expansion coefficients, bulk modulus, and density at different temperatures, which yields good agreement and correct trends. No other force field with optimized parameters for mixtures of [EMIm][OAc] and water has been presented in the literature yet. Optimized force field parameters for cellulose and other ILs will be published in upcoming articles.
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Affiliation(s)
- Eliane Roos
- Institut für Chemie - Theoretische Chemie, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
| | - Martin Brehm
- Institut für Chemie - Theoretische Chemie, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
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Liu X, O'Harra KE, Bara JE, Turner CH. Molecular insight into the anion effect and free volume effect of CO 2 solubility in multivalent ionic liquids. Phys Chem Chem Phys 2020; 22:20618-20633. [PMID: 32966430 DOI: 10.1039/d0cp03424j] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
For many years, experimental and theoretical studies have investigated the solubility of CO2 in a variety of ionic liquids (ILs), but the overarching absorption mechanism is still unclear. Currently, two different factors are believed to dominate the absorption performance: (a) the fractional free volume (FFV) accessible for absorption; and (b) the nature of the CO2 interactions with the anion species. The FFV is often more influential than the specific choice of the anion, but neither mechanism provides a complete picture. Herein, we have attempted to decouple these mechanisms in order to provide a more definitive molecular-level perspective of CO2 absorption in IL solvents. We simulate a series of nine different multivalent ILs comprised of imidazolium cations and sulfonate/sulfonimide anions tethered to benzene rings, along with a comprehensive analysis of the CO2 absorption and underlying molecular-level features. We find that the CO2 solubility has a very strong, linear correlation with respect to FFV, but only when comparisons are constrained to a common anion species. The choice of anion results in a fundamental remapping of the correlation between CO2 solubility and FFV. Overall, the free volume effect dominates in the ILs with smaller FFV values, while the choice of anion becomes more important in the systems with larger FFVs. Our proposed mechanistic map is intended to provide a more consistent framework for guiding further IL design for gas absorption applications.
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Affiliation(s)
- Xiaoyang Liu
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Kathryn E O'Harra
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Jason E Bara
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
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