Biomacromolecules· 2026Q1
Thermodynamic Aspects of Mixed-Linkage Glucan and Nanocellulose Interactions
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- Q1SCImago
- 2026year
Short summary
Mixed-linkage glucans (MLGs) form temperature-dependent hydrogel layers on cellulose nanocrystals via predominantly entropic interactions, with minor enthalpic contributions.
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Key points
- MLGs show limited aqueous solubility, with aggregation increasing at higher temperatures.
- MLGs form thick hydrogel layers on cellulose nanocrystal interfaces.
- MLG-cellulose interactions are characterized by temperature-dependent viscoelastic properties.
- Interactions are predominantly driven by entropy, with minor enthalpic contributions.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract This study addresses knowledge gaps concerning interactions between barley mixed-linkage glucans (MLGs) and TEMPO-oxidized cellulose nanocrystals (TCNC), focusing on underlying physiochemical and thermodynamic principles. Combining dynamic light scattering (DLS), quartz crystal microbalance with dissipation monitoring (QCM-D), and isothermal titration calorimetry (ITC), we systematically investigated MLG solution properties, adsorption at cellulose surfaces, and thermodynamics of interaction. DLS revealed limited aqueous solubility of MLGs, with elevated temperatures promoting aggregate formation and reducing solution stability. QCM-D experiments showed that MLG forms thick hydrogel layers at cellulose interfaces and Voigt modeling confirmed temperature-dependent viscoelastic properties of the layers. Analysis of QCM-D data with van’t Hoff approach together with ITC showcased only minor enthalpic contributions and predominantly entropic interactions. Altogether, these findings clarify MLG-cellulose interconnections and interlink between solubility, interfacial behavior, and functionalities of MLG in all-polysaccharide materials architectures. Additionally, the results point towards MLG providing a hydrating layer in plant cell walls in nature.
The authors' abstract, as published at the source. Biomacromolecules, 2026 · DOI ↗
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Field: Biomaterials
BiomaterialsMaterials Science