Acetylation of raw cotton for oil spill cleanup application: an FTIR and C-13 MAS NMR spectroscopic investigation

Adebajo, MO and Frost, RL (2004) Acetylation of raw cotton for oil spill cleanup application: an FTIR and C-13 MAS NMR spectroscopic investigation. Spectrochimica Acta Part A-molecular And Biomolecular Spectroscopy, 60 10: 2315-2321.


Author Adebajo, MO
Frost, RL
Title Acetylation of raw cotton for oil spill cleanup application: an FTIR and C-13 MAS NMR spectroscopic investigation
Journal name Spectrochimica Acta Part A-molecular And Biomolecular Spectroscopy    (ERA 2010 Rank C)   Check publisher's open access policy
Publication date 2004
Sub-type Article
DOI 10.1016/j.saa.2003.12.005
Volume number 60
Issue number 10
ISSN 1386-1425
Start page 2315
End page 2321
Total pages 7
Place of publication Oxford
Publisher Pergamon-elsevier Science Ltd
Language eng
Abstract Fourier transform infrared (FTIR) and C-13 MAS NMR spectroscopy have been used to investigate the acetylation of raw cotton samples with acetic anhydride without solvents in the presence of different amounts of 4-dimethylaminopyridine (DMAP) catalyst. This is a continuation of our previous investigation of acetylation of commercial cotton in an effort to develop hydrophobic, biodegradable, cellulosic sorbent materials for cleaning up oil spills. The FTIR data have again provided a clear evidence for successful acetylation. The NMR results further confirm the successful acetylation. The extent of acetylation was quantitatively determined using the weight percent gain (WPG) due to acetylation and by calculating the ratio R between the intensity of the acetyl C=O stretching band at 1740-1745 cm(-1) and the intensity of C-O stretching vibration of the cellulose backbone at about 1020-1040 cm(-1). The FTIR technique was found to be highly sensitive and reliable for the determination of the extent of acetylation. The level of acetylation of the raw cotton samples was found to be much higher than that of cotton fabrics and the previously studied commercial cotton. The variation of the R and WPG with reaction time, amount of DMAP catalyst and different samples of raw cotton is discussed. (C) 2003 Elsevier B.V. All rights reserved.
Keyword Spectroscopy
acetylation
cotton
cellulose
oil spill cleanup application
Fourier transform infrared (FTIR)
C-13 NMR spectroscopy
Cell-wall Components
Acetic-anhydride
Sorbents
Nonwovens
Fibers
Straw
Wood
Q-Index Code C1

 
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Created: Wed, 17 Oct 2007, 13:02:09 EST