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    Influence of TEMPO oxidation on the properties of ethylene glycol methyl ether acrylate grafted cellulose sponges

    Year: 2021

    Journal: Carbohydr. Polym., Volume 272, NOV 15

    Authors: Chiulan, Ioana; Panaitescu, Denis Mihaela; Radu, Elena-Ruxandra; Vizireanu, Sorin; Satulu, Vera; Bita, Bogdan; Gabor, Raluca Augusta; Nicolae, Cristian Andi; Raduly, Monica; Raditoiu, Valentin

    Organizations: Ministry of Research, Innovation and Digitization, CNCS/CCCDI -UEFISCDI, within PNCDI III [67TE/2020]; ERDF/COP 2014-2020 [P_36_611, 107066 -INOVABIOMED]

    Keywords: Sponges; TEMPO-oxidized cellulose nanofibers; Ethylene glycol methyl ether acrylate

    In this study, cellulose nanofibers (CNF) obtained via high-pressure microfluidization were 2,6,6-tetra-methylpiperidine-1-oxyl (TEMPO) oxidized (TOCNF) in order to facilitate the grafting of ethylene glycol methyl ether acrylate (EGA). FTIR and XPS analyses revealed a more efficient grafting of EGA oligomers on the surface of TOCNF as compared to the original CNF. As a result, a consistent covering of the TOCNF fibers with EGA oligomers, an increased hydrophobicity and a reduction in porosity were noticed for TOCNF-EGA. However, the swelling ratio of TOCNF-EGA was similar to that of original CNF grafted with EGA and higher than that of TOCNF, because the higher amount of grafted EGA onto oxidized cellulose and the looser structure reduced the contacts between the fibrils and increased the absorption of water. All these results corroborated with a good cytocompatibility and compression strength recommend TOCNF-EGA for applications in regenerative medicine.
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