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Crystallization of Sodium Dodecyl Sulfate-Water Micellar Solutions under Linear Cooling

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Title: Crystallization of Sodium Dodecyl Sulfate-Water Micellar Solutions under Linear Cooling
Authors: Miller, RM
Ces, O
Brooks, NJ
Robles, ESJ
Cabral, JT
Item Type: Journal Article
Abstract: The crystallization kinetics of sodium dodecyl sulfate (SDS)-water micellar solutions, under linear cooling conditions, were experimentally investigated using optical microscopy, differential scanning calorimetry, and infrared spectroscopy. Cooling rates were systematically varied, from 0.1 to 50 °C min–1, encompassing environmental to near-“isothermal” temperature changes, between 22 and −5 °C, for a reference concentration of 20% SDS-H2O. The cooling rate was shown to determine the dominant crystal morphologies, with platelets and needles predominating at the lowest and highest rates, respectively. The results were rationalized in terms of isothermal crystallization data and the time–temperature cooling profile. Rates 0.1, 5.0, and 10 °C min–1 yield morphologies and kinetics analogous to those of isothermal quenches at the corresponding crystallization temperature window. Nontrivial deviations were observed for intermediate rates (0.5, 1.0 °C min–1), due to commensurate changes in temperature and crystallization mechanism, accompanied by solute depletion. The polythermal metastable zone width was estimated, and the non-isothermal nucleation described by the Nývlt equation, while the Avrami and Kissinger models described overall crystallization kinetics. Our measurements quantify the impact of temperature gradients in the crystallization of ubiquitous SDS micellar solutions, for a range of practically relevant profiles incurred during manufacturing and storage.
Issue Date: 24-Mar-2017
Date of Acceptance: 23-Mar-2017
URI: http://hdl.handle.net/10044/1/48786
DOI: https://dx.doi.org/10.1021/acs.cgd.6b01841
ISSN: 1528-7483
Publisher: American Chemical Society
Start Page: 2428
End Page: 2437
Journal / Book Title: CRYSTAL GROWTH & DESIGN
Volume: 17
Issue: 5
Copyright Statement: © 2017 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Crystal Growth and Design, after peer review and technical editing by the publisher. To access the final edited and published work see: https://dx.doi.org/10.1021/acs.cgd.6b01841
Sponsor/Funder: Procter & Gamble Technical Centres Ltd
Funder's Grant Number: G4P-4502554341 'Robles'
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Crystallography
Materials Science, Multidisciplinary
Chemistry
Materials Science
METASTABLE ZONE WIDTHS
NONISOTHERMAL CRYSTALLIZATION
CRYSTAL MORPHOLOGY
AQUEOUS-SOLUTION
12-HYDROXYSTEARIC ACID
NUCLEATION KINETICS
PHASE-DIAGRAM
BEHAVIOR
PARAMETERS
POTASSIUM
Inorganic & Nuclear Chemistry
0306 Physical Chemistry (Incl. Structural)
0912 Materials Engineering
0302 Inorganic Chemistry
Publication Status: Published
Appears in Collections:Faculty of Engineering
Chemistry
Biological and Biophysical Chemistry
Chemical Engineering
Faculty of Natural Sciences



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