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A comparative study on the enzymatic biodegradability of covalently functionalized double- and multi-walled carbon nanotubes

Modugno, Gloria and Ksar, Fayçal and Battigelli, Alessia and Russier, Julie and Lonchambon, Pierre and Eleto da Silva, Edelma and Ménard-Moyon, Cécilia and Soula, Brigitte and Galibert, Anne-Marie and Pinault, Mathieu and Flahaut, Emmanuel and Mayne-L'Hermite, Martine and Bianco, Alberto A comparative study on the enzymatic biodegradability of covalently functionalized double- and multi-walled carbon nanotubes. (2016) Carbon, 100. 367-374. ISSN 0008-6223

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Official URL: http://dx.doi.org/10.1016/j.carbon.2016.01.023

Abstract

The assessment of the biodegradability potential of carbon nanotubes (CNTs) is a fundamental point towards their applications in materials science and biomedicine. Due to the continuous concerns about the fate of such type of nanomaterials, it is very important to understand if they can undergo degradation under certain conditions and if the morphology and structure of the nanotubes play a role in this process. For this purpose we have decided to undertake a comparative study on the enzymatic degradation of CNTs with concentric multilayers. Double-walled (DW) and multi-walled (MW) CNTs of various lengths, degrees of oxidation and functionalizations using different methods were treated with horseradish peroxidase (HRP). While all tested DWCNTs resulted resistant to the biodegradation, some of the MWCNTs were partially degraded by the enzyme. We have found that short oxidized multi-walled CNTs functionalized by amidation were reduced in length and presented a high amount of defects at the end of the period of treatment with HRP. This comparative study holds its importance in the understanding of the structural changes of different types of nanotubes towards the catalytic enzymatic degradation and will help to design safer CNTs for future applications.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Carbon website : http://www.sciencedirect.com/science/journal/00086223
HAL Id:hal-01486989
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Université de Strasbourg - UNISTRA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Funders:
Agence Nationale de la Recherche (ANR) - Centre National de la Recherche Scientifique (CNRS) - International Center for Frontier Research in Chemistry (icFRC)
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Deposited By: cirimat webmestre
Deposited On:10 Mar 2017 14:35

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