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Marcos Celada L, Martín J, Dvinskikh SV, Olsén P. Fully Bio-Based Ionic Liquids for Green Chemical Modification of Cellulose in the Activated-State. ChemSusChem 2024; 17:e202301233. [PMID: 37792278 DOI: 10.1002/cssc.202301233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/19/2023] [Accepted: 10/04/2023] [Indexed: 10/05/2023]
Abstract
Biopolymers, especially cellulose, are vital to transitioning to a circular economy and reducing our reliance on fossil fuels. However, for many applications a high degree of cellulose hydroxyl modification is necessary. The challenge is that the chemical features of the hydroxyls of cellulose and water are similar. Therefore, chemical modification of cellulose is often explored under non-aqueous conditions with systems that result in high hydroxyl accessibility and reduce cellulose aggregation. Unfortunately, these systems depend on hazardous and complex solvents from fossil resources, which diverge from the initial sustainability objectives. To address this, we developed three new betaine-based ionic liquids that are fully bio-based, scalable, and green. We found that a specific ionic liquid had the perfect chemical features for the chemical activation of cellulose without disturbing its crystalline ordering. The high activation in heterogeneous conditions was exemplified by reacting cellulose with succinic anhydride, resulting in more than 30 % conversion of all hydroxyls on cellulose. Overall, this work opens new perspectives for the derivatization of cellulosic materials while simultaneously "keeping it green".
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Affiliation(s)
- Lukas Marcos Celada
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 100 44, Stockholm, Sweden
| | - Judith Martín
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 100 44, Stockholm, Sweden
| | - Sergey V Dvinskikh
- Department of chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Peter Olsén
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 100 44, Stockholm, Sweden
- Wallenberg Wood Science Center, KTH Royal Institute of Technology, Teknikringen 56, 100 44, Stockholm, Sweden
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Roquart M, Kharlamova A, Marcos Celada L, Norvez S, Nicolaÿ R, Corté L. PEG-Based Photo-Cross-Linked Networks with Adjustable Topologies and Mechanical Properties. Biomacromolecules 2023; 24:4454-4464. [PMID: 36780702 DOI: 10.1021/acs.biomac.2c01265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
We report the synthesis of networks having adjustable topologies and mechanical properties. Our approach consists of photopolymerizing poly(ethylene glycol) diacrylates (PEG-DA) in the presence of mixtures of mono- and multifunctional thiols. We show that the introduction of monothiols as non-cross-linking transfer agents provides a simple way to tune the topology of the networks and produce soft extensible networks. In a systematic study with model short PEG-DA (Mn = 700 g·mol-1), we explored how the gel point and network properties, such as the swelling ratio, the soluble fraction, the viscoelastic moduli, and the ultimate stress and strain, can be adjusted by varying the ratio of thiol to acrylate functions and the average functionality of the thiol mixture. We applied this strategy to longer chains of PEG-DA (Mn = 2300 and 3200 g·mol-1) and varied the viscoelastic and tensile responses of these networks to optimize their adhesive performance. This simple and robust approach further enriches the toolbox of thiol-acrylate polymerization and expands the application scope of PEG-based hydrogels.
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Affiliation(s)
- Maïlie Roquart
- Centre des Matériaux, MINES Paris, CNRS, PSL University, 91003 Evry, France
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Anna Kharlamova
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Lukas Marcos Celada
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Sophie Norvez
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Renaud Nicolaÿ
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
| | - Laurent Corté
- Centre des Matériaux, MINES Paris, CNRS, PSL University, 91003 Evry, France
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris, CNRS, PSL University, 75005 Paris, France
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