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:
* Corresponding Author: Ana Villares. Email:
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.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.