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https://hdl.handle.net/10316/80893
Title: | Cyclodextrin-grafted cellulose: physico-chemical characterization | Authors: | Medronho, B. Andrade, R. Vivod, V. Ostlund, A. Miguel, M. G. Lindman, B. Voncina, B. Valente, A. J. M. |
Issue Date: | 1-Mar-2013 | Volume: | 93 | Issue: | 1 | Abstract: | 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. | URI: | https://hdl.handle.net/10316/80893 | ISSN: | 1879-1344 | DOI: | 10.1016/j.carbpol.2012.08.109 | Rights: | openAccess |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
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