Hybrid Plasma−Liquid Functionalisation for the Enhanced Stability of CNT Nanofluids for Application in Solar Energy Conversion

Ruairi J. McGlynn; Hussein S. Moghaieb; Paul Brunet; Supriya Chakrabarti; Paul Maguire; Davide Mariotti

doi:10.3390/nano12152705

Hybrid Plasma−Liquid Functionalisation for the Enhanced Stability of CNT Nanofluids for Application in Solar Energy Conversion

Ruairi J. McGlynn, Hussein S. Moghaieb, Paul Brunet, Supriya Chakrabarti, Paul Maguire, Davide Mariotti

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Abstract

Macroscopic ribbon-like assemblies of carbon nanotubes (CNTs) are functionalised using a simple direct-current-based plasma−liquid system, with oxygen and nitrogen functional groups being added. These modifications have been shown to reduce the contact angle of the ribbons, with the greatest reduction being from 84° to 35°. The ability to improve the wettability of the CNTs is of paramount importance for producing nanofluids, with relevance for a number of applications. Here, in particular, we investigate the efficacy of these samples as nanofluid additives for solar−thermal harvesting. Surface treatments by plasma-induced non-equilibrium electrochemistry are shown to enhance the stability of the nanofluids, allowing for full redispersion under simulated operating conditions. Furthermore, the enhanced dispersibility results in both a larger absorption coefficient and an improved thermal profile under solar simulation.

Original language	English
Article number	e2705
Journal	Nanomaterials
Volume	12
Issue number	15
DOIs	https://doi.org/10.3390/nano12152705
Publication status	Published (in print/issue) - 6 Aug 2022

Bibliographical note

Funding Information:
The authors would like to acknowledge the EPRSC for supporting this work through EP/M015211/1 and EP/R008841/1.

Publisher Copyright:
© 2022 by the authors.

Keywords

solar–thermal
plasma functionalisation
carbon nanotubes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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nanomaterials-12-02705-v2.pdfFinal published version, 2.39 MBLicence: CC BY

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title = "Hybrid Plasma−Liquid Functionalisation for the Enhanced Stability of CNT Nanofluids for Application in Solar Energy Conversion",

abstract = "Macroscopic ribbon-like assemblies of carbon nanotubes (CNTs) are functionalised using a simple direct-current-based plasma−liquid system, with oxygen and nitrogen functional groups being added. These modifications have been shown to reduce the contact angle of the ribbons, with the greatest reduction being from 84° to 35°. The ability to improve the wettability of the CNTs is of paramount importance for producing nanofluids, with relevance for a number of applications. Here, in particular, we investigate the efficacy of these samples as nanofluid additives for solar−thermal harvesting. Surface treatments by plasma-induced non-equilibrium electrochemistry are shown to enhance the stability of the nanofluids, allowing for full redispersion under simulated operating conditions. Furthermore, the enhanced dispersibility results in both a larger absorption coefficient and an improved thermal profile under solar simulation.",

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AU - McGlynn, Ruairi J.

AU - Moghaieb, Hussein S.

AU - Brunet, Paul

AU - Chakrabarti, Supriya

AU - Maguire, Paul

AU - Mariotti, Davide

PY - 2022/8/6

Y1 - 2022/8/6

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AB - Macroscopic ribbon-like assemblies of carbon nanotubes (CNTs) are functionalised using a simple direct-current-based plasma−liquid system, with oxygen and nitrogen functional groups being added. These modifications have been shown to reduce the contact angle of the ribbons, with the greatest reduction being from 84° to 35°. The ability to improve the wettability of the CNTs is of paramount importance for producing nanofluids, with relevance for a number of applications. Here, in particular, we investigate the efficacy of these samples as nanofluid additives for solar−thermal harvesting. Surface treatments by plasma-induced non-equilibrium electrochemistry are shown to enhance the stability of the nanofluids, allowing for full redispersion under simulated operating conditions. Furthermore, the enhanced dispersibility results in both a larger absorption coefficient and an improved thermal profile under solar simulation.

KW - solar–thermal

KW - plasma functionalisation

KW - carbon nanotubes

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DO - 10.3390/nano12152705

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JO - Nanomaterials

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ER -

Hybrid Plasma−Liquid Functionalisation for the Enhanced Stability of CNT Nanofluids for Application in Solar Energy Conversion

Abstract

Bibliographical note

Keywords

UN SDGs

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