Chitosan-Functionalized Graphene Nanocomposite Films: Interfacial Interplay and Biological Activity

Graphene oxide ( ) has recently captured tremendous attention, but only few functionalized graphene derivatives were used as fillers, and insightful studies dealing with the thermal, mechanical, and biological effects of graphene surface functionalization are currently missing in the literature. Her...

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Bibliographic Details
Published in:Materials 2020-02, Vol.13 (4), p.998
Main Authors: Wrońska, Natalia, Anouar, Aicha, El Achaby, Mounir, Zawadzka, Katarzyna, Kędzierska, Marta, Miłowska, Katarzyna, Katir, Nadia, Draoui, Khalid, Różalska, Sylwia, Piwoński, Ireneusz, Bryszewska, Maria, El Kadib, Abdelkrim, Lisowska, Katarzyna
Format: Article
Language:English
Subjects:
Antimicrobial agents
Biological activity
Biological effects
Catalase
Chitosan
Contact angle
E coli
Ethanol
Fillers
Fourier transforms
Gram-positive bacteria
Graphene
Graphite
Hemoglobin
Mechanical properties
Medical equipment
Nanocomposites
Nanomaterials
Nanoparticles
Oxidation
Surface chemistry
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Summary:Graphene oxide ( ) has recently captured tremendous attention, but only few functionalized graphene derivatives were used as fillers, and insightful studies dealing with the thermal, mechanical, and biological effects of graphene surface functionalization are currently missing in the literature. Herein, reduced graphene oxide ( ), phosphorylated graphene oxide ( ), and trimethylsilylated graphene oxide ( ) were prepared by the post-modification of . The electrostatic interactions of these fillers with chitosan afforded colloidal solutions that provide, after water evaporation, transparent and flexible chitosan-modified graphene films. All reinforced chitosan-graphene films displayed improved mechanical, thermal, and antibacterial ( , ) properties compared to native chitosan films. Hemolysis, intracellular catalase activity, and hemoglobin oxidation were also observed for these materials. This study shows that graphene functionalization provides a handle for tuning the properties of graphene-reinforced nanocomposite films and customizing their functionalities.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma13040998