title: Cyclodextrin-grafted cellulose: physico-chemical characterization.
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.
authors: University of Coimbra, Department of Chemistry, Coimbra, Portugal. bfmedronho@portugalmail.pt
authors: B
authors: B
authors: Medronho
authors: R
authors: R
authors: Andrade
authors: V
authors: V
authors: Vivod
authors: A
authors: A
authors: Ostlund
authors: M G
authors: MG
authors: Miguel
authors: B
authors: B
authors: Lindman
authors: B
authors: B
authors: Voncina
authors: A J M
authors: AJ
authors: Valente
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D055598:Chemical Phenomena; D003505:Cyclodextrins / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D003505:Cyclodextrins; D012997:Solvents; D002482:Cellulose