Surfactant-Chelating Agent Interactions
Licentiatavhandling, 2024
To investigate these interactions and their relationship to the chemical structures of the surfactant and chelating agent, NMR spectroscopy was employed, focusing on 13C chemical shift and line shape analysis. Moreover, the impact of these interactions on the formulation properties was assessed by measuring cloud point, viscosity, surface tension, and contact angle on hydrophobic surfaces.
The study reveals that interactions between the head group of amphoteric surfactants and chelating agents lead to the formation of oligomeric surfactant analogues with larger hydrophilic moieties, resulting in smaller, more spherical micelles. The strength and likelihood of these interactions depend on several factors, including the presence of oppositely charged moieties, neighboring groups near the interacting atoms, and the volume-to-length ratio of the surfactant. The interaction offers possibilities for tuning the aggregation behavior of systems containing surfactants and chelating agents, and consequently, the macroscopic properties of the formulation.
Chelating agents
NMR spectroscopy
Amphoteric surfactants
Författare
Josmary Alejandra Velasquez Cano
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Josmary Velásquez, Sarah Lundgren, Lars Evenäs, Romain Bordes. Amphoteric Surfactant-Chelating Agent Interactions: Impact on Bulk and Surface Properties
Hydrotroper i rengöringsformuleringar
Stiftelsen för Strategisk forskning (SSF) (ID20-0039), 2021-06-01 -- 2026-05-31.
Ämneskategorier
Materialteknik
Kemiteknik
Styrkeområden
Materialvetenskap
Utgivare
Chalmers
Pater Noster, Chemistry building, Kemigården 4 (Chalmers, Johanneberg campus).
Opponent: Prof. Krister Holmberg, Chalmers University of Technology, Sweden