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@article{Donina:2022:10.1039/d2sm00643j,
author = {Donina, L and Porcar, L and Cabral, JT},
doi = {10.1039/d2sm00643j},
journal = {Soft Matter},
pages = {7010--7019},
title = {Effect of salt on the lamellar L-alpha-to-MLV transformation in SDS/octanol/water under microfluidic flow},
url = {http://dx.doi.org/10.1039/d2sm00643j},
volume = {18},
year = {2022}
}

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TY  - JOUR
AB  - We investigate the effect of added (NaCl) salt and varying flow rate on the phase behaviour and flow response of a model surfactant Lα phase, sodium dodecyl sulfate (SDS)/octanol/water, using small angle neutron scattering (SANS) and polarised optical microscopy in microfluidics, supported by NMR, viscosity, conductivity and zeta potential measurements. A long (∼3 m) tubular microchannel device is employed to quantify the spatiotemporal structural evolution of the system towards multilamellar vesicles (MLV). The effect of salt is rationalised in terms of changes in membrane bending rigidity and phase stability. It is shown that ∼1.8 w/w% NaCl addition results in MLV formation within the shortest time (or equivalent lengthscale) and yields near-centrosymmetric scattering profiles characteristic of MLVs (at a reference 1 mL h−1 flow rate and 90 s−1 shear rate). Further salt addition yields biphasic systems that remain strongly aligned under flow, while lower salt content also increases scattering anisotropy, accompanied by higher membrane rigidity and solution viscosity. Increasing flow rate causes greater initial Lα alignment, and thus flow anisotropy, but also faster evolution towards isotropy and MLV formation.
AU  - Donina,L
AU  - Porcar,L
AU  - Cabral,JT
DO  - 10.1039/d2sm00643j
EP  - 7019
PY  - 2022///
SN  - 1744-683X
SP  - 7010
TI  - Effect of salt on the lamellar L-alpha-to-MLV transformation in SDS/octanol/water under microfluidic flow
T2  - Soft Matter
UR  - http://dx.doi.org/10.1039/d2sm00643j
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000834591300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://pubs.rsc.org/en/content/articlelanding/2022/SM/D2SM00643J
UR  - http://hdl.handle.net/10044/1/104980
VL  - 18
ER  -

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