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Grafting onto microfibrils of native cellulose

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Abstract

Attempts to modify the surface of oxidized cellulose microfibrils were made using amine terminated molecules. First, native cellulose was oxidized with catalytic amounts of 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO), sodium hypochlorite and sodium bromide in water. The primary alcohol moieties were selectively oxidized into carboxyl groups. Then, the oxidized cellulose was coupled with amines derivatives by a peptidic reaction by using carbodiimide and hydroxysuccimide as catalyst and amidation agent. The obtained coupled cellulose showed low polarity, with stability in non-polar solvents. The products were characterized by FTIR, 13C NMR, rheology and conductometric titration as well as transmission electron microscopy. Their hydrophobic character was evaluated by observing their behavior in polar and non-polar solvents.

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Acknowledgments

We thank Dr. Laurent Heux and Dr. Jean-Luc Puteaux of CERMAV for respectively 13C NMR and TEM experiments.

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Correspondence to Elsa Lasseuguette.

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Lasseuguette, E. Grafting onto microfibrils of native cellulose. Cellulose 15, 571–580 (2008). https://doi.org/10.1007/s10570-008-9200-1

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