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| 024 | 7 | _ | |a 10.1016/j.jcis.2019.05.052 |2 doi |
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| 100 | 1 | _ | |a Fabozzi, Antonio |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Branched alkyldimethylamine oxide surfactants: An effective strategy for the design of high concentration/low viscosity surfactant formulations |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2019 |b Elsevier |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1560862508_8312 |2 PUB:(DE-HGF) |
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| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a HypothesisThe rational design of branched-tail surfactants is a suitable strategy to obtain low-viscosity surfactant-rich isotropic aqueous mixtures with negligible effects on biodegradability. This opens a way to the design of concentrated (“water-free”) surfactant formulations, highly attractive for their ecological and economic benefits.ExperimentsThe aggregation behaviour of N,N-dimethyl-2-propylheptan-1-amine oxide (C10DAO-branched) in aqueous mixtures is investigated across the entire composition range by polarized optical microscopy, small angle X-ray and neutron scattering, electron paramagnetic resonance, and pulse-gradient stimulated echo nuclear magnetic resonance. The humidity scanning quartz crystal microbalance with dissipation monitoring technique is validated as a tool for the fast screening of surfactants phase behaviour. Furthermore, the shear viscosities and viscoelastic moduli of the systems are determined by rheological measurements.FindingsWith respect to the linear isomer, C10DAO-branched presents a much lower tendency to form lyotropic liquid crystalline phases. Except for a narrow composition and temperature range in which a lamellar structure is observed, C10DAO-branched aqueous mixtures are isotropic liquids whose microstructure changes, with increasing concentration, from micellar solutions to unstructured dispersions of hydrated surfactant molecules. Low-viscosity was found for all these mixtures, including the most concentrated ones. Thus, the introduction of a single short side-chain in the tail is demonstrated to be an effective approach to increase the active concentration in surfactant formulations. |
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| 700 | 1 | _ | |a Russo Krauss, Irene |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Vitiello, Rosa |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Fornasier, Marco |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Sicignano, Luca |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a King, Stephen |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Guido, Stefano |0 P:(DE-HGF)0 |b 6 |
| 700 | 1 | _ | |a Jones, Christopher |0 P:(DE-HGF)0 |b 7 |
| 700 | 1 | _ | |a Paduano, Luigi |0 0000-0002-1105-4237 |b 8 |
| 700 | 1 | _ | |a Murgia, Sergio |0 0000-0002-9986-0638 |b 9 |e Corresponding author |
| 700 | 1 | _ | |a D'Errico, Gerardino |0 0000-0001-6383-8618 |b 10 |e Corresponding author |
| 773 | _ | _ | |a 10.1016/j.jcis.2019.05.052 |g Vol. 552, p. 448 - 463 |0 PERI:(DE-600)1469021-4 |p 448 - 463 |t Journal of colloid and interface science |v 552 |y 2019 |x 0021-9797 |
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