Specific ion effects in the adsorption of carboxymethyl cellulose on cellulose: The influence of industrially relevant divalent cations

Arumughan, Vishnu; Nypelö, Tiina; Hasani, Merima; Brelid, Harald; Albertsson, Sverker; Wågberg, Lars; Larsson, Anette

doi:10.1016/j.colsurfa.2021.127006

Cited by 12 publications

(17 citation statements)

References 39 publications

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“…Ca 2+ ions have been observed to affect CMC structure in solution and favor the CMC adsorption on cellulose more than Mg 2+ ions (Figure 2c,d), which was ascribed to the different polarity of those ions. 90,134 Although also affected by the pH and the ionic strength, the adsorption of cationic polymers on cellulose surfaces is driven by attractive electrostatic interactions between oppositely charged groups and, especially, the remarkable gain in entropy associated with the release of bound counterions. 135 The a d s o r p t i o n o f c a t i o n i c p o l y m e r s l i k e p o l y -(diallyldimethylammonium chloride) (PDADMAC) and chitosan on CNF has been monitored in real-time by QCM-D and SPR.…”

Section: Interactions Of Cnms With Polymersmentioning

confidence: 99%

Biobased Nanomaterials─The Role of Interfacial Interactions for Advanced Materials

et al. 2023

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This review presents recent advances regarding biomass-based nanomaterials, focusing on their surface interactions. Plant biomass-based nanoparticles, like nanocellulose and lignin from industry side streams, hold great potential for the development of lightweight, functional, biodegradable, or recyclable material solutions for a sustainable circular bioeconomy. However, to obtain optimal properties of the nanoparticles and materials made thereof, it is crucial to control the interactions both during particle production and in applications. Herein we focus on the current understanding of these interactions. Solvent interactions during particle formation and production, as well as interactions with water, polymers, cells and other components in applications, are addressed. We concentrate on cellulose and lignin nanomaterials and their combination. We demonstrate how the surface chemistry of the nanomaterials affects these interactions and how excellent performance is only achieved when the interactions are controlled. We furthermore introduce suitable methods for probing interactions with nanomaterials, describe their advantages and challenges, and introduce some less commonly used methods and discuss their possible applications to gain a deeper understanding of the interfacial chemistry of biobased nanomaterials. Finally, some gaps in current understanding and interesting emerging research lines are identified.

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Section: Interactions Of Cnms With Polymersmentioning

confidence: 99%

Biobased Nanomaterials─The Role of Interfacial Interactions for Advanced Materials

et al. 2023

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“…The reason for the trend observed in the hydrodynamic diameter can be attributed to the interaction of Ca 2+ with CMC polymer chains. It has been suggested that Ca 2+ ions interact with CMC chains both through ion–ion correlations and dispersion interactions . This could reduce the charge density of CMCs close to neutral, as is evident from the electrophoretic mobility studies shown in Figure b.…”

Section: Resultsmentioning

confidence: 90%

“…It has been suggested that Ca 2+ ions interact with CMC chains both through ion−ion correlations and dispersion interactions. 38 This could reduce the charge density of CMCs close to neutral, as is evident from the electrophoretic mobility studies shown in Figure 3b. The electrophoretic mobility shifted to less negative values as the concentration of CaCl 2 increased and started to level off from 60 mM.…”

Section: Resultsmentioning

confidence: 96%

Calcium Ion-Induced Structural Changes in Carboxymethylcellulose Solutions and Their Effects on Adsorption on Cellulose Surfaces

et al. 2021

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The adsorption of carboxymethylcellulose (CMC) on cellulose surfaces is one of the most studied examples of the adsorption of an anionic polyelectrolyte on a like-charged surface. It has been suggested that divalent ions can act as a bridge between CMC chains and the surface of cellulose and enhance the CMC adsorption: they can, however, also alter the structure of CMCs in the solution. In previous investigations, the influence of cations on solution properties has been largely overlooked. This study investigates the effect of Ca 2+ ions on the properties of CMC solutions as well as the influence on cellulose nanofibers (CNFs), which was studied by dynamic light scattering and correlated with the adsorption of CMC on a cellulose surface probed using QCM-D. The presence of Ca 2+ facilitated the multichain association of CMC chains and increased the hydrodynamic diameter. This suggests that the adsorption of CMCs at high concentrations of CaCl 2 is governed mainly by changes in solution properties rather than by changes in the cellulose surface. Furthermore, an entropy-driven mechanism has been suggested for the adsorption of CMC on cellulose. By comparing the adsorption of CMC from H 2 O and D 2 O, it was found that the release of water from the cellulose surface is driving the adsorption of CMC.

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“…[6][7][8] Notably, negatively charged polyelectrolyte systems such as PEDOT: PSS and carboxymethyl cellulose (CMC) were also found to have affinity towards cellulose surface. 1,[9][10][11] The adsorption of CMC on cellulose has been used as a resource-efficient way to introduce surface charges. The presence of carboxylic groups on the surface enhances the swelling of the fiber, thus improving cell wall cohesion and increasing strength properties in final paper sheets.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, it was reported that adsorption of CMC is prone to cation-specific effect, where adsorption of CMC in the presence of Ca 2+ was higher than in the presence of Mg 2+ ions, and the observed change in adsorbed CMC was ascribed to dispersion interactions due to the larger polarizability of Ca 2+ ions. 10 Changes in observed properties in biological and non-biological systems stemming from ions' identity are broadly called ion-specific effects. 15 The majority of the research on specific ionic effects on interfacial phenomena exclusively investigates the effects of counter ions, while the effect of different co-ions is often overlooked, because co-ions are anticipated to be excluded from the interface according to the Debye-Huckel theory.…”

Section: Introductionmentioning

confidence: 99%

Anion specific adsorption of carboxymethyl cellulose on cellulose

Arumughan

Özeren

Hedenqvist

et al. 2023

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Integration of fiber modification step with modern pulp mill is a resource efficient way to produce functional fibers. Motivated by the need to integrate polymer adsorption with the current pulping system, anion-specific effects in Carboxymethylcellulose (CMC) adsorption have been studied. The QCM-D adsorption experiments revealed that the CMC adsorption to the cellulose model surface is prone to anion-specific effects. A correlation was observed between the adsorbed CMC and the degree of hydration of the co-ions present in the magnesium salts. The presence of chaotropic co-ion such as nitrate increased the adsorption of CMC on cellulose compared to the presence of the kosmotropic sulfate co-ion. However, anion-specificity was not significant in the case of salts containing zinc cations. The hydration of anions determines the distribution of ions at the interface. Chaotropic ions, such as nitrates, are likely to be distributed near the chaotropic cellulose surface, causing changes in the ordering of water molecules and resulting in greater entropy gain once released from the surface, thus increasing the CMC adsorption.

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Specific ion effects in the adsorption of carboxymethyl cellulose on cellulose: The influence of industrially relevant divalent cations

Cited by 12 publications

References 39 publications

Biobased Nanomaterials─The Role of Interfacial Interactions for Advanced Materials

Biobased Nanomaterials─The Role of Interfacial Interactions for Advanced Materials

Calcium Ion-Induced Structural Changes in Carboxymethylcellulose Solutions and Their Effects on Adsorption on Cellulose Surfaces

Anion specific adsorption of carboxymethyl cellulose on cellulose

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