Improvement of the Thermal Stability of TEMPO-Oxidized Cellulose Nanofibrils by Heat-Induced Conversion of Ionic Bonds to Amide Bonds.

Authors :: Lavoine N
Bras J
Saito T
Isogai A
Source :: Macromolecular rapid communications [Macromol Rapid Commun] 2016 Jul; Vol. 37 (13), pp. 1033-9. Date of Electronic Publication: 2016 May 17.
Publication Year :: 2016
Abstract: Improving thermal stability of TEMPO-oxidized cellulose nanofibrils (TOCNs) is a major challenge for the development and preparation of new nanocomposites. However, thermal degradation of TOCNs occurs at 220 °C. The present study reports a simple way to improve thermal stability of TOCNs by the heat-induced conversion of ionic bonds to amide bonds. Coupling amine-terminated polyethylene glycol to the TOCNs is performed through ionic bond formation. Films are produced from the dispersions by the casting method. Infrared spectroscopy and thermogravimetric analysis confirm conversion of ionic bonds to amide bonds for the modified TOCN samples after heating. As a result, improvement of TOCNs' thermal stability by up to 90 °C is successfully achieved.<br /> (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Subjects :: Hot Temperature
Ions chemistry
Oxidation-Reduction
Amides chemistry
Cellulose chemistry
Cyclic N-Oxides chemistry
Nanofibers chemistry
Temperature

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