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Optically transparent membrane based on bacterial cellulose/polycaprolactone

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Author(s): H. S. Barud | S. J. L. Ribeiro | C. L. P Carone | R. Ligabue | Sandra Einloft | P. V. S. Queiroz | A. P. B. Borges | V. D. Jahno

Journal: PolĂ­meros
ISSN 0104-1428

Volume: 23;
Issue: 1;
Start page: 135;
Date: 2013;
Original page

Keywords: Bacterial cellulose | polycaprolactone | transparent membrane

ABSTRACT
Optically transparent membranes from bacterial cellulose (BC)/polycaprolactone (PCL) have been prepared by impregnation of PCL acetone solution into dried BC membranes. UV-Vis measurements showed an increase on transparency in BC/PCL membrane when compared with pristine BC. The good transparency of the BC/PCL can be related to the presence of BC nanofibers associated with deposit of PCL nano-sized spherulites which are smaller than the wavelength of visible light and practically free of light scattering. XRD results show that cellulose type I structure is preserved inside the BC/PCL membrane, while the mechanical properties suggested indicated that PCL acts as a plasticizer for the BC membrane. The novel BC/PCL membrane could be used for preparation of fully biocompatible flexible display and biodegradable food packaging.

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