RT Journal Article
T1 Topological dynamics of micelles formed by geometrically varied surfactants
A1 Sánchez Fernández, Adrián
A1 Larsson, Johan
A1 Leung, Anna
A1 Holmqvist, Peter
A1 Czakkel, Orsolya
A1 Nylander, Tommy
A1 Ulvenlund, Stefan
A1 Wahlgren, Marie
K1 Diffusion
K1 Fluid dynamics
K1 Micelles
K1 Molecular dynamics
K1 Surfactants
AB The molecular architecture of sugar-based surfactants strongly affects their self-assembled structure, i.e., the type of micelles they form, which in turn controls both the dynamics and rheological properties of the system. Here, we report the segmental and mesoscopic structure and dynamics of a series of C16 maltosides with differences in the anomeric configuration and degree of tail unsaturation. Neutron spin-echo measurements showed that the segmental dynamics can be modeled as a one-dimensional array of segments where the dynamics increase with inefficient monomer packing. The network dynamics as characterized by dynamic light scattering show different relaxation modes that can be associated with the micelle structure. Hindered dynamics are observed for arrested networks of worm-like micelles, connected to their shear-thinning rheology, while nonentangled diffusing rods relate to Newtonian rheological behavior. While the design of novel surfactants with controlled properties poses a challenge for synthetic chemistry, we demonstrate how simple variations in the monomer structure can significantly influence the behavior of surfactants
PB ACS Publications
SN 0743-7463
YR 2022
FD 2022
LK http://hdl.handle.net/10347/29203
UL http://hdl.handle.net/10347/29203
LA eng
NO Langmuir 2022, 38, 33, 10075–10080
NO The authors thank the Swedish Research Council Formas (Grant 2015-666) for funding J.L. The research was performed with financial support from the Vinnova─Swedish Governmental Agency for Innovation Systems within the NextBioForm Competence Centre. The authors also thank the Institut Laue-Langevin, France, for the awarded beamtime (Proposal No. 9-10-1652). NSE data is openly available at doi: 10.5291/ILL-DATA.9-10-1652
DS Minerva
RD 30 abr 2026