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Xyloglucan-cellulose Nanocrystal-chitosan Double Network Hydrogels for Soft Actuators by Nadège Leray; Malika Talantikite; Ana Villares; Bernard Cathala is a Materials Science article available to read on EtoBox.

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Hydrogels are materials consisting in a three-dimensional hydrophilic polymer network swollen by a large amount of water. An efficient strategy to elaborate hydrogels consists in establishing double polymer networks in order to achieve high strengthening effect associated with other properties such as transparency or tailored swelling capacities. In this work, we prepared cellulose nanocrystals (CNC)-based hydrogels with double network architecture. The first network, formed by CNC and xyloglucan (XG), takes advantage of entropic adsorption of XG on the CNC surface while the second network relies on electrostatic interactions between cationic Chitosan (Chi) and anionic CNC. Hydrogels with different compositions were successfully prepared. Their rheological properties, stability and swelling capacities in acidic and alkaline solutions were evaluated. Internal organizations of hydrogels were investigated by fluorescence microscopy after polymer labelling and polarized optical microscopy (POM). Finally, hydrogels demonstrated excellent mechanical properties and tuneable swelling capacities that can be leveraged for the implementation of bilayer actuators. Therefore, we further prepare

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Author

Nadège Leray; Malika Talantikite; Ana Villares; Bernard Cathala

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Materials Science (Physical Sciences)