Design and synthesis of an azobenzene–betaine surfactant for photo-rheological fluids

Simple item page
dc.contributor.authorButler, CSGen_AU
dc.contributor.authorKing, JPen_AU
dc.contributor.authorGiles, LWen_AU
dc.contributor.authorMarlow, JBen_AU
dc.contributor.authorVidallon, MLPen_AU
dc.contributor.authorSokolova, AVen_AU
dc.contributor.authorde Campo, Len_AU
dc.contributor.authorTuck, KLen_AU
dc.contributor.authorTabor, RFen_AU
dc.date.accessioned2021-06-28T23:51:08Zen_AU
dc.date.available2021-06-28T23:51:08Zen_AU
dc.date.issued2021-07-15en_AU
dc.date.statistics2021-06-24en_AU
dc.description.abstractHypothesis Morphology of surfactant self-assemblies are governed by the intermolecular interactions and packing constraints of the constituent molecules. Therefore, rational design of surfactant structure should allow targeting of the specific self-assembly modes, such as wormlike micelles (WLMs). By inclusion of an appropriate photo-responsive functionality to a surfactant molecule, light-based control of formulation properties without the need for additives can be achieved. Experiments A novel azobenzene-containing surfactant was synthesised with the intention of producing photo-responsive wormlike micelles. Aggregation of the molecule in its cis and trans isomers, and its concomitant flow properties, were characterised using UV–vis spectroscopy, small-angle neutron scattering, and rheological measurements. Finally, the fluids capacity for mediating particle diffusion was assessed using dynamic light scattering. Findings The trans isomer of the novel azo-surfactant was found to form a viscoelastic WLM network, which transitioned to inviscid ellipsoidal aggregates upon photo-switching to the cis isomer. This was accompanied by changes in zero-shear viscosity up to 16,000x.UV–vis spectroscopic and rheo-SANS analysis revealed interactions of the trans azobenzene chromophore within the micelles, influencing aggregate structure and contributing to micellar rigidity. Particles dispersed in a 1 wt% surfactant solution showed a fivefold increase in apparent diffusion coefficient after UV-irradiation of the mixture. Crown Copyright © 2021 Published by Elsevier Inc.en_AU
dc.identifier.citationButler, C. S. G., King, J. P., Giles, L. W., Marlow, J. B., Vidallon, M. L. P., Sokolova, A., de Campo, L., Tuck, K. L. & Tabor, R. F. (2021). Design and synthesis of an azobenzene–betaine surfactant for photo-rheological fluids. Journal of Colloid and Interface Science, 594, 669-680. doi:10.1016/j.jcis.2021.02.061en_AU
dc.identifier.issn0021-9797en_AU
dc.identifier.journaltitleJournal of Colloid and Interface Scienceen_AU
dc.identifier.pagination669-680en_AU
dc.identifier.urihttps://doi.org/10.1016/j.jcis.2021.02.061en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10936en_AU
dc.identifier.volume594en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNeutron diffractionen_AU
dc.subjectSynthesisen_AU
dc.subjectRheologyen_AU
dc.subjectSurfactantsen_AU
dc.subjectBetaineen_AU
dc.subjectVisible radiationen_AU
dc.titleDesign and synthesis of an azobenzene–betaine surfactant for photo-rheological fluidsen_AU
dc.typeJournal Articleen_AU
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1-s2.0-S0021979721002071-main.pdf
Size:
2.26 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Journal Articles