Room-temperature Decomposition of 2,2'-Azobis(isobutyronitrile) in Emulsion Gels with and Without Silica
Abstract
The decomposition of 2,2'-azobis(isobutyronitrile) (AIBN) at room temperature was studied in emulsion gels, with and without silica, using UV/visible spectroscopy. The emulsion gels consisted of toluene, AIBN, an aqueous solution of a surfactant (either hexadecyltrimethylammonium bromide, CTAB, or sodium dodecyl sulfate, SDS), and, in some cases, fumed silica. The AIBN compositions were determined in the opaque emulsion gels by converting them to transparent microemulsions. The decomposition rate constants for AIBN were determined to be 3.7 x 10[-8] s[-1] (±0.6 × 10[-8]s[-1]) for the emulsion gels and 10.2 x 10[-8] s[-1](±1.3 x 10[-8] s[-1]) for the silica-containing emulsion gels. These rate constants were significantly greater than that in toluene solution, which, by our technique, is below our measurement threshold (effectively 0).
Recommended Citation
G. Xu et al., "Room-temperature Decomposition of 2,2'-Azobis(isobutyronitrile) in Emulsion Gels with and Without Silica," Journal of Colloid and Interface, Elsevier, Jan 2006.
The definitive version is available at https://doi.org/10.1016/j.jcis.2006.07.015
Department(s)
Chemistry
Sponsor(s)
National Science Foundation (U.S.)
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2006 Elsevier, All rights reserved.
Publication Date
01 Jan 2006
