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Topological Dynamics of Micelles Formed by Geometrically Varied Surfactants

Sanchez-Fernandez, Adrian LU orcid ; Larsson, Johan ; Leung, Anna E. ; Holmqvist, Peter LU ; Czakkel, Orsolya ; Nylander, Tommy LU ; Ulvenlund, Stefan LU and Wahlgren, Marie LU orcid (2022) In Langmuir 38(33). p.10075-10080
Abstract

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... (More)

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.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
38
issue
33
pages
6 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • pmid:35914231
  • scopus:85135987856
ISSN
0743-7463
DOI
10.1021/acs.langmuir.2c00230
language
English
LU publication?
yes
id
59736675-5ae4-4741-aeb0-25bff3721046
date added to LUP
2022-10-14 10:57:30
date last changed
2024-11-01 10:49:59
@article{59736675-5ae4-4741-aeb0-25bff3721046,
  abstract     = {{<p>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.</p>}},
  author       = {{Sanchez-Fernandez, Adrian and Larsson, Johan and Leung, Anna E. and Holmqvist, Peter and Czakkel, Orsolya and Nylander, Tommy and Ulvenlund, Stefan and Wahlgren, Marie}},
  issn         = {{0743-7463}},
  language     = {{eng}},
  number       = {{33}},
  pages        = {{10075--10080}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Langmuir}},
  title        = {{Topological Dynamics of Micelles Formed by Geometrically Varied Surfactants}},
  url          = {{http://dx.doi.org/10.1021/acs.langmuir.2c00230}},
  doi          = {{10.1021/acs.langmuir.2c00230}},
  volume       = {{38}},
  year         = {{2022}},
}