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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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Publication details

The article was received on 23 Jan 2013, accepted on 28 Mar 2013 and first published on 19 Apr 2013


Article type: Paper
DOI: 10.1039/C3SM50248A
Citation: Soft Matter, 2013,9, 5380-5390
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    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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