Improvement of the Thermal Stability of TEMPO‐Oxidized Cellulose Nanofibrils by Heat‐Induced Conversion of Ionic Bonds to Amide Bonds. Issue 13 (17th May 2016)

• Record Type: Journal Article
• Authors: Lavoine, Nathalie; Bras, Julien; Saito, Tsuguyuki; Isogai, Akira
• Is Part Of: Macromolecular rapid communications. Volume 37:Issue 13(2016)
• Page Start: 1033
• Page End: 1039
• Publication Date: 2016-05-17
• Subjects: amides -- heat‐induced conversion -- ionic bonds -- TEMPO‐oxidized cellulose nanofibrils -- thermal stability; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201600186
• Languages: English
• ISSNs: 1022-1336

Abstract

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. Abstract : TEMPO‐oxidized cellulose nanofibrils (TOCNs) have attracted much interest as new bio‐based nanomaterials with outstanding properties. Here, a simple way to improve thermal stability of TOCNs by the heat‐induced conversion of ionic bonds between amine‐terminated polyethylene glycols and TOCNs to amide bonds is reported. The chemically modified TOCNs are promising for the preparation of thermally stable nanocomposites.