Hydrophilicity improvement of mercerized bacterial cellulose films by polyethylene glycol graft
Mercerized bacterial nanocellulose (BNCm) was grafted to polyethylene glycol with different molar ratios (BNCm-PEGs).Crystallinity of BNCm was preserved after grafting with PEGs.Grafting of PEG was observed on C-2, C-3 and C-6 of BNCm mainly on amorphous zones.Nanofilms produced with BNCm-PEG sh...
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Veröffentlicht in: | International journal of biological macromolecules 2016-05, Vol.86, p.599-605 |
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Sprache: | eng |
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Zusammenfassung: | Mercerized bacterial nanocellulose (BNCm) was grafted to polyethylene glycol with different molar ratios (BNCm-PEGs).Crystallinity of BNCm was preserved after grafting with PEGs.Grafting of PEG was observed on C-2, C-3 and C-6 of BNCm mainly on amorphous zones.Nanofilms produced with BNCm-PEG showed an increased free energy of surface comparatively to BNCm.All BNCm-PEG films retained the biocompatibility of BNCm films.
In this work, polyethylene glycol (PEG), of tree distinct molar masses (200, 300 and 400gmol1), 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: 8.1mNm1 vs BNCm-PEG400: 29.4mNm1), and a decrease in dispersive components (BNCm: 41.7mNm1 vs BNCm-PEG400: 35.2mNm1) of the surface free energy. The BNCm-PEG films were more hydrophilic than BNCm and retained the biocompatibility with L929 fibroblast cells culture. |
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ISSN: | 0141-8130 1879-0003 |
DOI: | 10.1016/j.ijbiomac.2016.01.115 |