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Issue 28, 2015
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Photopolymerizable nanogels as macromolecular precursors to covalently crosslinked water-based networks

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Abstract

We present a strategy for directly and efficiently polymerizing aqueous dispersions of reactive nanogels into covalently crosslinked polymer networks with properties that are determined by the initial chemical and physical nanogel structure. This technique can extend the range of achievable properties and architectures for networks formed in solution, particularly in water where monomer selection for direct polymerization and the final network properties are quite limited. Nanogels were initially obtained from a solution polymerization of a hydrophilic monomethacrylate and either a hydrophilic PEG-based dimethacrylate or a more hydrophobic urethane dimethacrylate, which produced globular particles with diameters of 10–15 nm with remarkably low polydispersity in some cases. Networks derived from a single type of nanogel or a blend of nanogels with different chemistries when dispersed in water gelled within minutes when exposed to low intensity UV light. Modifying the nanogel structure changes both covalent and non-covalent secondary interactions in the crosslinked networks and reveals critical design criteria for the development of networks from highly internally branched, nanoscale prepolymer precursors.

Graphical abstract: Photopolymerizable nanogels as macromolecular precursors to covalently crosslinked water-based networks

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Publication details

The article was received on 15 Dec 2014, accepted on 06 Jun 2015 and first published on 08 Jun 2015


Article type: Paper
DOI: 10.1039/C4SM02788D
Soft Matter, 2015,11, 5647-5655

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    Photopolymerizable nanogels as macromolecular precursors to covalently crosslinked water-based networks

    E. A. Dailing, W. K. Setterberg, P. K. Shah and J. W. Stansbury, Soft Matter, 2015, 11, 5647
    DOI: 10.1039/C4SM02788D

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