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Basavaraj MG, McFarlane NL, Lynch ML, et al. Nanovesicle formation and microstructure in aqueous ditallowethylesterdimethylammonium chloride (DEEDMAC) solutions. J Colloid Interface Sci. 2014;429:17-24doi: 10.1016/j.jcis.2014.04.064.
Basavaraj, M. G., McFarlane, N. L., Lynch, M. L., & Wagner, N. J. (2014). Nanovesicle formation and microstructure in aqueous ditallowethylesterdimethylammonium chloride (DEEDMAC) solutions. Journal of colloid and interface science, 42917-24. https://doi.org/10.1016/j.jcis.2014.04.064
Basavaraj, Madivala G, et al. "Nanovesicle formation and microstructure in aqueous ditallowethylesterdimethylammonium chloride (DEEDMAC) solutions." Journal of colloid and interface science vol. 429 (2014): 17-24. doi: https://doi.org/10.1016/j.jcis.2014.04.064
Basavaraj MG, McFarlane NL, Lynch ML, Wagner NJ. Nanovesicle formation and microstructure in aqueous ditallowethylesterdimethylammonium chloride (DEEDMAC) solutions. J Colloid Interface Sci. 2014 Sep 01;429:17-24. doi: 10.1016/j.jcis.2014.04.064. Epub 2014 May 10. PMID: 24935185.
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J Colloid Interface Sci. 2014 Sep 01;429:17-24. doi: 10.1016/j.jcis.2014.04.064. Epub 2014 May 10.

Nanovesicle formation and microstructure in aqueous ditallowethylesterdimethylammonium chloride (DEEDMAC) solutions.

Journal of colloid and interface science

Madivala G Basavaraj, Naa Larteokor McFarlane, Matthew L Lynch, Norman J Wagner

Affiliations

  1. Center for Neutron Science, Department of Chemical & Biomolecular Engineering, University of Delaware, Colburn Laboratory, Newark, DE 19716, United States.
  2. Corporate Research Division, Procter and Gamble Company, Beckett Ridge Technical Center, West Chester, OH 45069, United States.
  3. Center for Neutron Science, Department of Chemical & Biomolecular Engineering, University of Delaware, Colburn Laboratory, Newark, DE 19716, United States. Electronic address: [email protected].

PMID: 24935185 DOI: 10.1016/j.jcis.2014.04.064

Abstract

HYPOTHESIS: Surfactant vesicles composed of ditallowethylesterdimethylammonium chloride (DEEDMAC), a cationic double tail surfactant, are commonly present in personal care industrial formulations such as fabric softeners. There is significant interest in formulating vesicle dispersions, investigation of stability, characterization of their structure and flow properties due to the biodegradable nature of DEEDMAC.

EXPERIMENTS: We investigate the formation and structure of unilamellar nanovesicles having a shell made of DEEDMAC and a core containing water. We use bright field optical microscopy to elucidate the formation mechanism, and a combination of small angle neutron scattering (SANS), cryogenic transmission electron microscopy (cryo-TEM), viscometry, densitometry, dynamic light scattering (DLS), small angle X-ray scattering (SAXS) and zeta potential measurements to determine the nanostructure of well-defined surfactant nanovesicles (∼15 nm diameter).

FINDINGS: We report methods for the determination of volume fraction of nanovesicles and vesicle density, which are crucial for quantitative estimation of nanovesicle performance in practical applications and for predicting vesicle stability. The nanovesicle volume fraction can be obtained directly from the intrinsic viscosity and density. The robust method presented here is simple and effective as confirmed by quantitative agreement of the results with independent SANS measurements.

Copyright © 2014 Elsevier Inc. All rights reserved.

Keywords: Cationic surfactant; DEEDMAC; Intrinsic viscosity; Nanovesicles; Self-assembly; Small angle neutron scattering

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