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Dual-responsive Nanogels Based on Oligo(ethylene Glycol) Methacrylates and Acidic Co-Monomers

Dual-responsive Nanogels Based on Oligo(ethylene Glycol) Methacrylates and Acidic Co-Monomers

Micaela A Macchione, M Florencia Sacarelli, Ana C Racca, Catalina Biglione, Graciela M Panzetta-Dutari, Miriam C Strumia

Soft Matter. 2019 Dec 4;15(47):9700-9709.

PMID: 31724683

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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP109171	Tetraethylene glycol dimethacrylate		109-17-1	Price

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