Infrared and 13C MAS nuclear magnetic resonance spectroscopic study of acetylation of cotton.
The acetylation of commercial cotton samples with acetic anhydride without solvents in the presence of about 5% 4-dimethylaminopyridine (DMAP) catalyst was followed using Fourier transform infrared (FTIR) and 13C MAS NMR spectroscopy. This preliminary investigation was conducted in an effort to develop hydrophobic, biodegradable, cellulosic materials for subsequent application in oil spill cleanup. The FTIR results provide clear evidence for successful acetylation though the NMR results indicate that the level of acetylation is low. Nevertheless, the overall results indicate that cotton fibres are potential candidates suitable for further development via acetylation into hydrophobic sorbent materials for subsequent oil spill cleanup application. The results also indicate that de-acetylation, the reverse of the equilibrium acetylation reaction, occurred when the acetylation reaction was prolonged beyond 3 h.
Adebajo
Moses O
MO
Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, 2 George Street, GPO Box 2434, Brisbane, Queensland 4001, Australia. m.adebajo@qut.edu.au
Frost
Ray L
RL
D000042:Absorption; D002247:Carbon Isotopes / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry; D032561:Cotton Fiber; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013997:Time Factors
D002247:Carbon Isotopes; D002482:Cellulose