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Cellulose
Published in: Cellulose 6/2016

03-09-2016 | Original Paper

Enhanced radical scavenging activity of polyhydroxylated C60 functionalized cellulose nanocrystals

Authors: Fatima Awan, Eli Bulger, Richard M. Berry, Kam C. Tam

Published in: Cellulose | Issue 6/2016

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Abstract

A first demonstration of conjugated polyhydroxylated fullerene (C60(OH)30) on the surface of cellulose nanocrystals (CNC)s is reported. These nanohybrids display favourable antioxidant performance and are an attractive alternative to derivatized fullerene nanocages reported previously. UV–Vis measurements indicated that the C60(OH)30-CNC system scavenged 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radicals to a greater degree than C60(OH)30 alone, due to the nucleation of C60(OH)30 on the surface of CNC and high colloidal stability of the engineered nanohybrid. A mechanism for the 2-stage process of the radical reaction with C60(OH)30-CNC is proposed, and modelled by pseudo-first order kinetics. Successful grafting of C60(OH)30 on CNC was confirmed by FTIR, while TEM revealed the morphology of the system with a grafting degree of 20.8 % C60(OH)30. Zeta potential measurements of C60(OH)30-CNC in aqueous solution showed a high stability in the pH range 4.0-8.0, indicating functionality of the CNC based antioxidant system as a biocompatible and sustainable protocol with potential for use in personal care applications.
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Metadata
Title
Enhanced radical scavenging activity of polyhydroxylated C60 functionalized cellulose nanocrystals
Authors
Fatima Awan
Eli Bulger
Richard M. Berry
Kam C. Tam
Publication date
03-09-2016
Publisher
Springer Netherlands
Published in
Cellulose / Issue 6/2016
Print ISSN: 0969-0239
Electronic ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-016-1057-0

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