Biopolymer based nanocomposite ionogels: high performance, sustainable and solid electrolytes

International audienceIonogels based on a chemically cross-linked polysaccharide matrix and a hydrophobic ionic liquid offer a sustainable alternative to petrochemical-based polymer electrolytes. These newly obtained cellulose-based ionogels present the flexibility, thermal stability and high ionic conductivity of a liquid; this latter property can be further enhanced by adding silica nanofibers. As a result they can be used as high-performance and eco-friendly electrolytes in the production of all-solid, sustainable devices

Ion segregation in an ionic liquid confined within chitosan based chemical ionogels

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Site-Selective Surface Modification Using Enzymatic Soft Lithography

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Xyloglucan−cellulose nanocrystal multilayered films: effect of film architecture on enzymatic hydrolysis

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Nano-structured cellulose nanocrystals-xyloglucan multilayered films for the detection of cellulase activity

WOS:000312246200017International audienceMultilayered cellulose nanocrystals-xyloglucan (CN-XG) films were assembled by spincoating at two CN concentrations inducing different structural colourations. Internal structure of both films was probed by neutron reflectometry (NR) revealing different thicknesses and architectures. The impact of film structure on degradation process by cellulases was revealed by a change in colours of the films, as CN an

Natural Rubber-Based Ionogels

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Natural rubber based ionogels

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Xyloglucan–Cellulose Nanocrystal Multilayered Films: Effect of Film Architecture on Enzymatic Hydrolysis

Understanding the hydrolysis process of lignocellulosic substrates remains a challenge in the biotechnology field. We aimed here at investigating the effect of substrate architecture on the enzymatic degradation process using two different multilayered model films composed of cellulose nanocrystals (CNCs) and xyloglucan (XG) chains. They were built by a spin-assisted layer-by-layer (LbL) approach and consisted either of (i) an alternation of CNC and XG layers or of (ii) layers of mixed (CNC/XG) complexes alternated with polycation layers. Neutron reflectivity (NR) was used to determine the architecture and composition of these films and to characterize their swelling in aqueous solution. The films displayed different [XG]/[CNC] ratios and swelling behavior. Enzymatic degradation of films was then performed and investigated by quartz crystal microbalance with dissipation monitoring (QCM-D). We demonstrated that some architectural features of the substrate, such as polysaccharide accessibility, porosity, and cross-links, influenced the enzymatic degradation