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Issue 22, 2013
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Degradable microgels synthesized using reactive polyvinylalkoxysiloxanes as crosslinkers

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Abstract

In the present work we demonstrate the synthesis of degradable thermo-sensitive poly(N-vinylcaprolactam) microgels via precipitation polymerization using reactive polyvinylalkoxysiloxanes as crosslinkers (Cross-PAOS). These compounds were synthesized by co-condensation of vinyltriethoxysilane and tetraethoxysilane followed by transesterification with poly(ethylene glycol) monomethyl ether (PEG) to increase their water solubility. Experimental results showed that the microgels synthesized using Cross-PAOS exhibited excellent colloidal stability in water. These microgels are thermo-responsive and their size can be tuned depending upon the ratio of vinyl and PEG groups in Cross-PAOS. The size of microgel particles increases with increasing vinyl groups in Cross-PAOS while it decreases with increasing PEG groups. The presence of silicon dioxide in the microgel structure was confirmed by X-ray photoelectron spectroscopy and elemental analysis. Additionally, the microgels prepared in this way contain crosslinking sites which can be degraded under alkaline conditions.

Graphical abstract: Degradable microgels synthesized using reactive polyvinylalkoxysiloxanes as crosslinkers

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Supplementary files

Article information


Submitted
23 Jan 2013
Accepted
28 Mar 2013
First published
19 Apr 2013

Soft Matter, 2013,9, 5380-5390
Article type
Paper

Degradable microgels synthesized using reactive polyvinylalkoxysiloxanes as crosslinkers

G. Agrawal, J. Wang, B. Brüster, X. Zhu, M. Möller and A. Pich, Soft Matter, 2013, 9, 5380
DOI: 10.1039/C3SM50248A

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