Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 86, Issue -, Pages 599-605Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2016.01.115
Keywords
Bacterial cellulose; Grafting polyethylene glycol; Hydrophilic films
Funding
- CNPq (Conselho Nacional de Pesquisa)
- REUNI (Restruturacao e Expansao das Universidades Federais) program
- Rede Nanobiotec/Capes-Brazil
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In this work, polyethylene glycol (PEG), of tree distinct molar masses (200, 300 and 400 g mol(-1)), was grafted onto mercerized bacterial nanocellulose (BNCm) and applied to produce nanofilms (BNCm-PEG). The products BNCm-PEG were characterized by NMR and thermal analysis. Solid-state NMR and X-ray diffraction analyses exhibited no significant differences in index of BNCm-PEG derivatives compared to BNCm, indicating that grafting reaction did not modify the BNCm crystalline structure. The apparent contact angle of the films showed that BNCm-PEG films exhibited a pronounced increase in the polar components (BNCm: 8.1 mN m(-1) vs BNCm-PEG400: 29.4 mN m(-1)), and a decrease in dispersive components (BNCm: 41.7 mN m(-1) vs BNCm-PEG400: 35.2 mN m(-1)) of the surface free energy. The BNCm-PEG films were more hydrophilic than BNCm and retained the biocompatibility with L929 fibroblast cells culture. (C) 2016 Elsevier B.V. All rights reserved.
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