Foam Stability Mediated by Cellulose Nanocrystal–Anionic Surfactant Interactions
Priscila da C. Rodrigues, Thomas Myrdek, Guilherme A. Ferreira
TL;DR
This study explores how cellulose nanocrystals and anionic surfactants interact to improve foam stability in sustainable aqueous systems.
Contribution
The paper reveals how CNC–surfactant interactions can be tuned to control foam stability and interfacial properties for green applications.
Findings
CNC slightly increased surfactant critical micelle concentration and reduced surfactant adsorption at the interface.
CNC enhanced foam stability at low surfactant concentrations by forming percolated networks and reinforcing interfacial films.
High surfactant concentrations dispersed CNC well, reducing viscoelasticity and foam stability.
Abstract
The combination of cellulose nanocrystals (CNC) and anionic alkyl poly(ether) carboxylate surfactants offers a sustainable approach to modulating the interfacial and foaming properties of aqueous systems. This study investigated CNC–surfactant interactions in bulk and at the air–water interface using surface tension, interfacial rheology, foaming tests, particle size, zeta potential, and electron microscopy. CNC slightly increased the critical micelle concentration and reduced surfactant adsorption at the interface, indicating an interaction between the two components. Increasing the surfactant concentration improved CNC dispersion, forming smaller, more uniform aggregates. Although CNC addition slightly reduced foamability due to slower surfactant diffusion and increased surface tension, it significantly enhanced foam stability at low surfactant concentrations. This improvement was…
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Taxonomy
TopicsAdvanced Cellulose Research Studies · Pickering emulsions and particle stabilization · Surfactants and Colloidal Systems