Vol.8, No.1, 2020, pp.29-43, doi:10.32604/jrm.2020.07850
OPEN ACCESS
RESEARCH ARTICLE
Adsorption Behavior of Reducing End-Modified Cellulose Nanocrystals: A Kinetic Study Using Quartz Crystal Microbalance
  • Maud Chemin, Céline Moreau, Bernard Cathala, Ana Villares*
INRAE, UR BIA, F-44316, Nantes, France
* Corresponding Author: Ana Villares. Email: ana.villares@inrae.fr
Received 05 July 2019; Accepted 08 October 2019; Issue published 01 January 2020
Abstract
In this work, we studied the adsorption of modified cellulose nanocrystals 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-NH2), 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.
Keywords
Cellulose nanocrystals; amidation; reducing-end modification; Voight model; collision rate efficiency factor; rate constant
Cite This Article
Chemin, M., Moreau, C., Cathala, B., Villares, A. (2020). Adsorption Behavior of Reducing End-Modified Cellulose Nanocrystals: A Kinetic Study Using Quartz Crystal Microbalance. Journal of Renewable Materials, 8(1), 29–43.