Universität zu Köln

Klemmer, Anna, Klemmer, Helge ORCID: 0000-0001-6818-465X, Strey, Reinhard and Schmiedel, Peter (2015). An unconventional aging mechanism of nanoemulsions. Colloid Polym. Sci., 293 (11). S. 3199 - 3212. NEW YORK: SPRINGER. ISSN 1435-1536

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Abstract

Nanoemulsions were observed in simple dilution experiments, mimicking the flushing step in washing. The used low-energy method takes advantage of the ultra-low interfacial tension of the three-phase region of the underlying microemulsion systems similar to the well-known PIC method but boosted by a simultaneous temperature jump. Following the aging of the nanoemulsions with time-resolved dynamic light scattering, a slow radial growth of order 10(-5) nm/s and, more interestingly, a monomodal and quite narrow distribution of the formed oil droplets was observed, which was also confirmed with SANS measurements. The most astonishing observation was, however, that the aging kinetics of the droplet radius is linear in time (i.e. r similar to t). This is in contrast to the typical aging mechanisms, Ostwald ripening or coagulation, where the volume is linear with time (i.e. r (3) similar to t). Preliminary ideas regarding this unexpected and unconventional mechanism are discussed.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Klemmer, Anna UNSPECIFIED UNSPECIFIED UNSPECIFIED Klemmer, Helge UNSPECIFIED orcid.org/0000-0001-6818-465X UNSPECIFIED Strey, Reinhard UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmiedel, Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-387920
DOI:	10.1007/s00396-015-3783-5
Journal or Publication Title:	Colloid Polym. Sci.
Volume:	293
Number:	11
Page Range:	S. 3199 - 3212
Date:	2015
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1435-1536
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language HIGH-PRESSURE HOMOGENIZATION; SURFACTANT; EMULSIFICATION; MINIEMULSIONS; EMULSIONS; SYSTEM Multiple languages Chemistry, Physical; Polymer Science Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38792