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Waterborne polymer nanogels non-covalently crosslinked by multiple hydrogen bond arrays
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Chen, Yunhua, Ballard, Nicholas and Bon, Stefan Antonius Franciscus (2013) Waterborne polymer nanogels non-covalently crosslinked by multiple hydrogen bond arrays. Polymer Chemistry, Volume 4 (Number 2). pp. 387-392. doi:10.1039/c2py20615c
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Official URL: http://dx.doi.org/10.1039/C2PY20615C
Abstract
Synthetic colloidal hydrogel particles of sub-micron dimensions, often referred to as microgels and/or nanogels, generally consist of water-soluble polymers held together through chemical crosslinking by covalent bonds in order to preserve the distinct colloidal particle identity. Here we demonstrate the synthesis of non-covalently crosslinked nanogel particles in which the crosslinking through covalent bonds is replaced by physical crosslinking induced by strong self-complementary quadruple hydrogen bond interactions. The multiple hydrogen bond (MHB) arrays were introduced in the form of a 2-ureido-4[1H]pyrimidinone (UPy) functionalized polyethylene glycol methacrylate (PEGMA) comonomer, which was employed in the synthesis of colloidal nanogels made from N-isopropylacrylamide (NIPAm) or a mixture of 2-(2-methoxyethoxy)ethyl methacrylate and oligo(ethylene glycol) methacrylate (MEO2MA-co-OEGMA) following conventional free radical polymerization routes. The temperature-dependent swelling properties of the non-covalently crosslinked nanogels with differences in UPy loadings were studied, clearly demonstrating that MHB arrays can work as crosslinking moieties warranting the colloidal particle identity of the prepared hydrogels.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Chemistry | ||||
| Journal or Publication Title: | Polymer Chemistry | ||||
| Publisher: | Royal Society of Chemistry | ||||
| ISSN: | 1759-9954 | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Volume: | Volume 4 | ||||
| Number: | Number 2 | ||||
| Page Range: | pp. 387-392 | ||||
| DOI: | 10.1039/c2py20615c | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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