Synthesis enhancements for generating highly soluble tetrabutylammonium alginates in organic solvents

Schleeh, Thomas; Madau, Mathieu; Roessner, Dierk

doi:10.1016/j.carbpol.2014.07.079

Cited by 19 publications

(16 citation statements)

References 14 publications

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“…The obtained TBA alginate is a slightly yellowish powder, which can be dissolved in DMF (concentration 2 wt.%), ultimately obtaining a solution with no residue present. FTIR data (Figure 2) are in good agreement with the results of Schleeh et al [42]. After Na alginate is converted to alginic acid, a peak at 1610 cm −1 characteristic to carboxylate C-O stretching in Na alginate disappears, while the peak at 1740 cm −1 corresponding to saturated COOH becomes visible.…”

Section: Synthesis and Characterization Of Tba Alginatesupporting

confidence: 89%

“…As expected, with the synthesis of TBA alginate, the peak of COO − at 1610 cm −1 reappears. While we do not determine the degree of substitution of TBA (DSTBA) in the scope of this paper, we note that a similar synthesis leads to DSTBA values in the range of 0.80-0.95 [42]. XPS results of the as-prepared Na 0.67 MnO 2 confirm the presence of Na, Mn and O along with trace amounts of carbon (Figure 1b).…”

Section: Synthesis and Characterization Of Tba Alginatementioning

confidence: 87%

Section: Synthesis and Characterization Of Tba Alginatementioning

confidence: 99%

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Enhanced Electrochemical Properties of Na0.67MnO2 Cathode for Na-Ion Batteries Prepared with Novel Tetrabutylammonium Alginate Binder

et al. 2022

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Both the binder and solid–electrolyte interface play an important role in improving the cycling stability of electrodes for Na-ion batteries. In this study, a novel tetrabutylammonium (TBA) alginate binder is used to prepare a Na0.67MnO2 electrode for sodium-ion batteries with improved electrochemical performance. The ageing of the electrodes is characterized. TBA alginate-based electrodes are compared to polyvinylidene fluoride- (PVDF) and Na alginate-based electrodes and show favorable electrochemical performance, with gravimetric capacity values of up to 164 mAh/g, which is 6% higher than measured for the electrode prepared with PVDF binder. TBA alginate-based electrodes also display good rate capability and improved cyclability. The solid–electrolyte interface of TBA alginate-based electrodes is similar to that of PVDF-based electrodes. As the only salt of alginic acid soluble in non-aqueous solvents, TBA alginate emerges as a good alternative to PVDF binder in battery applications where the water-based processing of electrode slurries is not feasible, such as the demonstrated case with Na0.67MnO2.

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Section: Synthesis and Characterization Of Tba Alginatesupporting

confidence: 89%

Section: Synthesis and Characterization Of Tba Alginatementioning

confidence: 87%

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Enhanced Electrochemical Properties of Na0.67MnO2 Cathode for Na-Ion Batteries Prepared with Novel Tetrabutylammonium Alginate Binder

et al. 2022

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“…A few years later, Babak et al adjusted that protocol by replacing the direct ion exchange by an heterogeneous acidification with HCl of Na-Alg followed by neutralization with tetrabutylammonium hydroxide (TBAOH) [ 69 ]. Some other groups chose to acidify alginate with formic acid, before neutralization with TBAOH [ 70 ]. When performing a S N 2 reaction, the use of anhydrous conditions is an important parameter as water could also act as the nucleophile.…”

Section: Amphiphilic Modifications Of Polysaccharidesmentioning

confidence: 99%

Formation of Amphiphilic Molecules from the Most Common Marine Polysaccharides, toward a Sustainable Alternative?

Wong

Brault

Gasparotto³

et al. 2021

Molecules

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Marine polysaccharides are part of the huge seaweeds resources and present many applications for several industries. In order to widen their potential as additives or bioactive compounds, some structural modifications have been studied. Among them, simple hydrophobization reactions have been developed in order to yield to grafted polysaccharides bearing acyl-, aryl-, alkyl-, and alkenyl-groups or fatty acid chains. The resulting polymers are able to present modified physicochemical and/or biological properties of interest in the current pharmaceutical, cosmetics, or food fields. This review covers the chemical structures of the main marine polysaccharides, and then focuses on their structural modifications, and especially on hydrophobization reactions mainly esterification, acylation, alkylation, amidation, or even cross-linking reaction on native hydroxyl-, amine, or carboxylic acid functions. Finally, the question of the necessary requirement for more sustainable processes around these structural modulations of marine polysaccharides is addressed, considering the development of greener technologies applied to traditional polysaccharides.

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“…TBA-Alg ( 1 ) was prepared by a modified protocol reported previously . NaAlg (8g) was added to a 1:1 mixture (v/v) of 0.6 M HCl solution and ethanol (500 mL) and stirred for 3 h at 4 °C.…”

Section: Experimental Sectionmentioning

confidence: 99%

Oxime Cross-Linked Alginate Hydrogels with Tunable Stress Relaxation

et al. 2019

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Stress relaxation is an important design parameter of biomaterials that can provide an artificial microenvironment mimicking natural extracellular matrix (ECM). Here, we report a novel hydrogel platform based on sodium alginate (NaAlg) with tunable stress relaxation. We first developed a new synthesis route to introduce alkoxyamine functional groups into the alginate polymer backbone. By mixing the resulting polymer (NaAlg-AA) with aldehydecontaining oxidized alginate (NaAlg-Ald), oxime cross-linked alginate hydrogels were prepared. We demonstrate that highly tunable stress relaxation and mechanical properties can be achieved by systematically varying the composition (concentration, polymer mixing ratios, degree of oxidation of NaAlg-Ald) or environmental factors (pH, temperature, and use of catalyst). Combined with the natural capability of the alginate to be cross-linked by divalent cations, the developed hydrogel formations possess the unique capability of dual cross-linking mechanisms with different gelation kinetics. We demonstrated that this dual cross-linking capability can (i) be utilized for the creation of hydrogels in microbead or microthread geometries and (ii) be useful for biomedical applications that require both the fast encapsulation of cells in hydrogels (fast calcium cross-linking) and the provision of controlled viscoelastic environments to cultured cells for an extended period (durable oxime cross-linking). With biocompatibility confirmed by the culture of a B-cell line encapsulated within the developed hydrogel, this novel hydrogel platform provides a good prospect in various applications where stress relaxation plays a key role in cell−matrix interactions.

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Synthesis enhancements for generating highly soluble tetrabutylammonium alginates in organic solvents

Cited by 19 publications

References 14 publications

Enhanced Electrochemical Properties of Na0.67MnO2 Cathode for Na-Ion Batteries Prepared with Novel Tetrabutylammonium Alginate Binder

Enhanced Electrochemical Properties of Na0.67MnO2 Cathode for Na-Ion Batteries Prepared with Novel Tetrabutylammonium Alginate Binder

Formation of Amphiphilic Molecules from the Most Common Marine Polysaccharides, toward a Sustainable Alternative?

Oxime Cross-Linked Alginate Hydrogels with Tunable Stress Relaxation

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