Cation effect on cohesion of phosphorylated cellulose nanofibers in extremely low salt concentrations
발표자
김동현 (울산과학기술원)
연구책임자
이동욱 (울산과학기술원)
초록
내용
Phosphorylated cellulose nanofibers (PCNFs) possess distinctive properties such as flame retardancy, low-toxicity synthesis, and ionic conductivity, which have high potential for sustainable applications such as energy storage and metal ion adsorption. To design elaborate and high-performance of functional systems, a fundamental understanding of ion-mediated interactions between PCNFs is crucial. Herein, we investigate the interaction forces between PCNF surfaces in aqueous solutions containing Na⁺, Mg²⁺, and Ca²⁺ cations measured by a surface forces apparatus (SFA). Notably, significant increases in interaction forces were observed under highly diluted conditions (~1 nM), regardless of ion valency. Additionally, as the ion concentration increased, the interaction forces initially rose but then sharply decreased beyond a critical ion concentration for each ion species. These findings provide constructive insights as to tailoring PCNFs in aqueous environments.