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Adsorption Behavior of Reducing End-Modified Cellulose Nanocrystals: A Kinetic Study Using Quartz Crystal Microbalance

Abstract : In this work, we studied the adsorption of modified cellulose nanocrys-tals onto solid surfaces by quartz crystal microbalance with dissipation monitoring (QCM-D). Cellulose nanocrystals obtained from tunicate (CNC) were modified at reducing end by amidation reactions. Two different functionalities were investigated: a polyamine dendrimer (CNC-NH 2), which interacts with gold surface by the amine groups; and a biotin moiety (CNC-Biot), which has a strong affinity for the protein streptavidin (SAV). QCM-D results revealed different adsorption behaviors between modified and unmodified CNCs. Hence, unmodified CNCs covered almost all the surface forming a rigid and flat layer whereas reducing end modified CNCs remained rather upright forming a hydrated and viscoelastic layer with lower surface coverage. The analysis of adsorption kinetics allowed the calculation of an apparent collision rate factor, which resulted 10-fold higher for unmodified CNCs compared to reducing end modified CNCs, therefore, demonstrating the different adsorption behavior.
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https://hal.inrae.fr/hal-02942059
Contributor : Ana Villares <>
Submitted on : Thursday, September 17, 2020 - 3:20:11 PM
Last modification on : Thursday, May 20, 2021 - 12:02:02 PM

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Maud Chemin, Céline Moreau, Bernard Cathala, Ana Villares. Adsorption Behavior of Reducing End-Modified Cellulose Nanocrystals: A Kinetic Study Using Quartz Crystal Microbalance. Journal of Renewable Materials, Scrivener publishing, 2020, 8 (1), pp.29-43. ⟨10.32604/jrm.2020.07850⟩. ⟨hal-02942059⟩

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