Nanodiamond promotes surfactant-mediated triglyceride removal from a hydrophobic surface at or below room temperature.
We demonstrate that ca. 5 nm nanodiamond particles dramatically improve triglyceride lipid removal from a hydrophobic surface at room temperature using either anionic or nonionic surfactants. We prepare nanodiamond-surfactant colloids, measure their stability by dynamic light scattering and use quartz crystal microbalance-dissipation, a technique sensitive to surface mass, in order to compare their ability to remove surface-bound model triglyceride lipid with ionic and nonionic aqueous surfactants at 15-25 °C. Oxidized, reduced, ω-alkylcarboxylic acid, and ω-alkylamidoamine surface-modified adducts are prepared, and then characterized by techniques including (13)C cross-polarization (CP) magic-angle spinning (MAS) NMR. Clear improvement in removal of triglyceride was observed in the presence of nanodiamond, even at 15 °C, both with nanodiamond-surfactant colloids, and by prior nanoparticle deposition on interfacial lipid, showing that nanodiamonds are playing a crucial role in the enhancement of the detergency process, providing unique leads in the development of new approaches to low-temperature cleaning.
School of Engineering and Applied Science, Aston University , Birmingham, B4 7ET United Kingdom.
Xianjin
X
Cui
Xianping
X
Liu
Andrew S
AS
Tatton
Steven P
SP
Brown
Haitao
H
Ye
Andrew
A
Marsh
D057927:Hydrophobic and Hydrophilic Interactions; D058612:Nanodiamonds / Q000737:chemistry*; D058525:Quartz Crystal Microbalance Techniques; D013499:Surface Properties; D013501:Surface-Active Agents / Q000737:chemistry*; D013696:Temperature; D014280:Triglycerides / Q000737:chemistry / Q000302:isolation & purification*
D058612:Nanodiamonds; D013501:Surface-Active Agents; D014280:Triglycerides; C022618:tristearin