Hydrophilicity improvement of mercerized bacterial cellulose films by polyethylene glycol graft

Renata da Silva; Maria R Sierakowski; Helen P Bassani; Sônia F Zawadzki; Cleverton L Pirich; Lucy Ono; Rilton A de Freitas

doi:10.1016/j.ijbiomac.2016.01.115

Hydrophilicity improvement of mercerized bacterial cellulose films by polyethylene glycol graft

Int J Biol Macromol. 2016 May:86:599-605. doi: 10.1016/j.ijbiomac.2016.01.115. Epub 2016 Feb 1.

Authors

Renata da Silva¹, Maria R Sierakowski¹, Helen P Bassani¹, Sônia F Zawadzki², Cleverton L Pirich¹, Lucy Ono³, Rilton A de Freitas⁴

Affiliations

¹ BioPol, Chemistry Department, Federal University of Paraná, P.O. Box 19081, Polytechnic Centre, 81531-980, Curitiba, Brazil.
² Synthetic Polymers Laboratory, Chemistry Department, Federal University of Paraná, P.O. Box 19081, Polytechnic Centre, 81531-980, Curitiba, Brazil.
³ Yasuyoshi Hayashi Laboratory, Pathology Department, Federal University of Paraná, P.O. Box 19081, Polytechnic Centre, 81531-990, Curitiba, Brazil.
⁴ BioPol, Chemistry Department, Federal University of Paraná, P.O. Box 19081, Polytechnic Centre, 81531-980, Curitiba, Brazil. Electronic address: [email protected].

PMID: 26845482
DOI: 10.1016/j.ijbiomac.2016.01.115

Abstract

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.

Keywords: Bacterial cellulose; Grafting polyethylene glycol; Hydrophilic films.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Animals
Bacteria / chemistry*
Cell Line
Cellulose / chemistry*
Hydrophobic and Hydrophilic Interactions*
Materials Testing
Mice
Molecular Weight
Nanostructures / chemistry
Polyethylene Glycols / chemistry*
Polymerization

Substances

Polyethylene Glycols
Cellulose