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Dual-responsive nanogels based on oligo(ethylene glycol) methacrylates and acidic co-monomers

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Abstract

Ethylene glycol-based nanogels (NGs) have demonstrated their potential for the development of next-generation formulations for biomedical applications due to their interesting properties. In this work, monodispersed NGs based on oligo(ethylene glycol) methacrylates (OEG) were synthesized through free radical precipitation/dispersion polymerization assisted by ultrasonication. Di(ethylene glycol)methyl ether methacrylate (DEGMA) and oligo(ethylene glycol) methacrylate (OEGMA; Mn 475 g mol−1) were used as the main monomers, acrylic acid (AA) or itaconic acid (IA) as co-monomers (OEG-co-AA and OEG-co-IA, respectively) and tetraethylene glycol dimethacrylate (TEGDMA) as crosslinker. The physicochemical properties of OEG-co-AA and OEG-co-IA NGs were studied including hydrodynamic diameter, poly-dispersity index, zeta potential and pH/temperature responsiveness. Samples with 4 mol% of both AA and IA showed nanometric sizes. Regarding their thermo-responsiveness, unexpected differences between NGs with AA or with IA were observed. Besides, NGs did not impair the cell viability of a breast tumour cell line even when high concentrations were added to the culture medium. The properties of the synthetized NGs showed that either NGs with 4% AA or with 4% IA are outstanding candidates for biomedical applications.

Graphical abstract: Dual-responsive nanogels based on oligo(ethylene glycol) methacrylates and acidic co-monomers

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Publication details

The article was received on 12 Jun 2019, accepted on 30 Oct 2019 and first published on 05 Nov 2019


Article type: Paper
DOI: 10.1039/C9SM01180C
Soft Matter, 2019, Advance Article

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    Dual-responsive nanogels based on oligo(ethylene glycol) methacrylates and acidic co-monomers

    M. A. Macchione, M. F. Sacarelli, A. C. Racca, C. Biglione, G. M. Panzetta-Dutari and M. C. Strumia, Soft Matter, 2019, Advance Article , DOI: 10.1039/C9SM01180C

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