Cyclodextrin-grafted cellulose: physico-chemical characterization

Medronho, B.; Andrade, R.; Vivod, V.; Ostlund, A.; Miguel, M. G.; Lindman, B.; Voncina, B.; Valente, A. J. M.

http://hdl.handle.net/10400.1/7260

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Cyclodextrins (CDs) can form inclusion complexes with a wide variety of molecules making them very attractive in different areas, such as pharmaceutics, biochemistry, food chemistry and textile. In this communication we will report on the physico-chemical characterization of cellulose modified with CDs by means of infra-red spectroscopy (FTIR), cross polarization magic angle spinning solid state nuclear magnetic resonance (CP-MAS NMR), polarized optical microscopy (POM) and thermal gravimetric analysis (TGA). Both CP-MAS NMR and FTIR indicate that CDs are chemically attached to cellulose backbone through the formation of ester bonds. Furthermore, the CD-grafted cellulose was dissolved in a "superphosphoric" acid solution but, despite the increase of hydrophilicity due to the modification, POM revealed that grafted cellulose was less soluble when compared to the unmodified polymer. The formation of a complex CD-cellulose network is suggested. (C) 2012 Elsevier Ltd. All rights reserved.

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http://hdl.handle.net/10400.1/7260

Editora

Elsevier SCI LTD

DOI

https://dx.doi.org/10.1016/j.carbpol.2012.08.109

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FCT2-Artigos (em revistas ou actas indexadas)

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