Investigating Adsorption of Cellulose Nanocrystals at Air–Liquid and Solid–Liquid Interfaces in the Presence of Hydrotropes

2Citations
Citations of this article
9Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

Coating a substrate with anisotropic nanoparticles such as cellulose nanocrystals (CNCs) confers some of their desirable physicochemical properties, such as strength, wettability, and barrier properties. The formation of monolayer coatings of CNCs via dip coating is affected by the enrichment of CNCs at both air–liquid and substrate–liquid interfaces. In this work, a surfactant-free method for dip coating CNCs is presented through use of the hydrotrope tetraethylammonium chloride. Hydrotropes demonstrate a different mechanism for facilitating interfacial enrichment, adsorbing to CNCs and rendering them weakly hydrophobic, causing them to adsorb to both solid–liquid and air–liquid interfaces without affecting the surface tension of the system. This new coating mechanism may be more robust as adsorption onto the substrate from the bulk dispersion is less sensitive to the air–liquid interface. Adsorption at the solid–liquid interface showed two distinct CNC layers, with a tightly bound, close-packed CNC layer at the interface, and a loosely associated outer layer. Adsorption of both layers is shown to be fully reversible after washing with ultra pure water, highlighting the potential of hydrotropes for facilitating new coating mechanisms.

Cite

CITATION STYLE

APA

Turpin, G. A., Nelson, A., Holt, S. A., Giles, L. W., Milogrodzka, I., Teo, B. M., … Tabor, R. F. (2022). Investigating Adsorption of Cellulose Nanocrystals at Air–Liquid and Solid–Liquid Interfaces in the Presence of Hydrotropes. Advanced Materials Interfaces, 9(31). https://doi.org/10.1002/admi.202200791

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free