Lauramine oxide

Catalog NumberHG1643205

CAS Number1643-20-5

CategoryAmphoteric Surfactants

Synonyms

1-Dodecanamine, N,N-dimethyl-, N-oxide;Dodecylamine, N,N-dimethyl-, N-oxide;Dodecyldimethylamine oxide

Molecular Weight

229.4

Molecular Formula

C14H31NO

Appearance

Liquid

Application

Use as emulsifying agent, dispersing agent.; Use as foaming agent, foam stabilizingagent.; Use as thickening agent.; Use as antistatic agent.

Active Content

30%

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Case Study

Optimizing Wettability in Surfactant Formulations Using Lauramine Oxide

García Martín, Juan F., et al. Journal of Surfactants and Detergents 17.5 (2014): 1035-1042.

This study explored the role of lauramine oxide (an amine oxide, AO) as a key pseudocationic non-ionic surfactant in enhancing the wettability of multi-surfactant blends. Through systematic formulation optimization, the study demonstrated how lauramine oxide contributed to synergistic performance improvements in aqueous surfactant systems, particularly for applications in hard-surface cleaning and detergent products.
Methodology: Response Surface Methodology (RSM) with a simplex-centroid mixture design was employed to optimize the ratio of three surfactants: an alkylpolyglucoside (APG), an ethoxylated fatty alcohol (AE, C12-14E11), and lauramine oxide (AO). The wetting power of binary and ternary mixtures was evaluated by measuring wetting time. The performance of pure surfactants and their blends was compared to identify synergistic effects.
Key Findings:
· The optimal surfactant ratio for achieving the highest wettability was determined to be 50.6% lauramine oxide, 19.3% APG, and 30.1% ethoxylated alcohol.
· This ternary blend demonstrated a wetting time of 39.3 seconds, significantly outperforming pure surfactants (APG: 115.7 s, AO: 62.3 s, AE: 99.7 s).
· Lauramine oxide exhibited strong pseudocationic behavior, enhancing compatibility and synergistic interactions with non-ionic surfactants.
· The addition of lauramine oxide to APG/AE mixtures substantially improved wettability compared to binary combinations.

pH-Dependent Foaming Properties of Dodecyldimethylamine Oxide Solutions

Schellmann, Kathrin, et al. Soft Matter 11.3 (2015): 561-571.

This work examined the influence of pH on the foaming behavior of dodecyldimethylamine oxide (C12DMAO), a surfactant known for its pH-responsive properties in aqueous solutions. The study focuses on understanding how protonation state and intermolecular interactions affect foam stability and structure.
Methodology: Foamability and foam stability of C12DMAO solutions were evaluated at a fixed concentration of 5 times the critical micelle concentration (cmc) across five pH values: 2, 3, 5, 8, and 10. The cmc, surface excess (Γ), and micelle aggregation number (m) were previously established as pH-dependent. Foam performance was correlated with the protonation behavior of C12DMAO and its ability to form hydrogen bonds.
Key Findings:
· Foamability remained largely unaffected by pH variations.
· Foam stability exhibited a significant maximum at pH = 5, near the pKa of C12DMAO.
· At low pH, electrostatic repulsion between surfactant layers contributed to enhanced stability.
· The peak stability at pH = 5 was attributed to optimized hydrogen bonding between protonated head groups, increasing interfacial rigidity and elasticity.
· Comparison with other C12 surfactants confirmed that foam stability is highest when hydrogen bonding between head groups is possible.

• Synonyms: 1-Dodecanamine, N,N-dimethyl-, N-oxide;Dodecylamine, N,N-dimethyl-, N-oxide;Dodecyldimethylamine oxide
• Molecular Weight: 229.4
• Molecular Formula: C14H31NO
• Appearance: Liquid
• Application: Use as emulsifying agent, dispersing agent.; Use as foaming agent, foam stabilizingagent.; Use as thickening agent.; Use as antistatic agent.
• Active Content: 30%