Soft Matter, volume 2, issue 7, pages 608

Tailoring the morphology of emulsion-templated porous polymers

Publication typeJournal Article
Publication date2006-05-23
Journal: Soft Matter
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.4
ISSN1744683X, 17446848
General Chemistry
Condensed Matter Physics
Abstract
Methods with which to tailor the morphology of polystyrene-based emulsion-templated (PolyHIPE) materials are presented. Increasing the temperature of the aqueous phase used to prepare the parent emulsion leads to an increase in average void and interconnect size in the resulting porous material. Additionally, the presence in the aqueous phase of small quantities of organic additives that are capable of partitioning between the two emulsion phases also affects the morphology of the porous material obtained. The additives examined were tetrahydrofuran (THF), methanol and poly(ethylene glycol) (PEG), all of which were found to increase the average void and interconnect diameters. It is suggested that THF and, to a lesser extent, PEG enhance Ostwald ripening, resulting in emulsion coarsening over time. Evidence for this was gleaned from NMR experiments to determine the rates of water diffusion in each emulsion. However, methanol was shown not to affect the rate of water diffusion. An alternative mechanism by which methanol could affect the emulsion stability is by depleting surfactant from the interface. However, higher levels of surfactant in emulsions containing methanol did not have a significant effect on morphology. To explain this, we suggest that methanol may result in depletion of surfactant from the emulsion interface, however additional surfactant serves not only to replace this depleted surfactant but also to increase the number of w/o micelles in the continuous phase. These facilitate transport of water between droplets, thus negating the effect of replacing the surfactant lost from the interface.

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Carnachan R. J. et al. Tailoring the morphology of emulsion-templated porous polymers // Soft Matter. 2006. Vol. 2. No. 7. p. 608.
GOST all authors (up to 50) Copy
Carnachan R. J., Maria B., Przyborski S. A., Cameron N. Tailoring the morphology of emulsion-templated porous polymers // Soft Matter. 2006. Vol. 2. No. 7. p. 608.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1039/b603211g
UR - https://doi.org/10.1039%2Fb603211g
TI - Tailoring the morphology of emulsion-templated porous polymers
T2 - Soft Matter
AU - Carnachan, Ross J
AU - Maria, Bokhari
AU - Przyborski, S. A.
AU - Cameron, Neil
PY - 2006
DA - 2006/05/23 00:00:00
PB - Royal Society of Chemistry (RSC)
SP - 608
IS - 7
VL - 2
SN - 1744-683X
SN - 1744-6848
ER -
BibTex |
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BibTex Copy
@article{2006_Carnachan,
author = {Ross J Carnachan and Bokhari Maria and S. A. Przyborski and Neil Cameron},
title = {Tailoring the morphology of emulsion-templated porous polymers},
journal = {Soft Matter},
year = {2006},
volume = {2},
publisher = {Royal Society of Chemistry (RSC)},
month = {may},
url = {https://doi.org/10.1039%2Fb603211g},
number = {7},
pages = {608},
doi = {10.1039/b603211g}
}
MLA
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MLA Copy
Carnachan, Ross J., et al. “Tailoring the morphology of emulsion-templated porous polymers.” Soft Matter, vol. 2, no. 7, May. 2006, p. 608. https://doi.org/10.1039%2Fb603211g.
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