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Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions

[Image: see text] Graphene nanoplatelets (GNPs) are stable and relatively inexpensive compared to single-layer graphene sheets and carbon nanotubes and are useful in diverse electronic, optoelectronic, and mechanical applications. Solution-state processing of the active material is desired in most o...

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Autores principales: Jones, Dorothy K., Watts, Taylor A., Gavvalapalli, Nagarjuna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8340392/
https://www.ncbi.nlm.nih.gov/pubmed/34368591
http://dx.doi.org/10.1021/acsomega.1c03126
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author Jones, Dorothy K.
Watts, Taylor A.
Gavvalapalli, Nagarjuna
author_facet Jones, Dorothy K.
Watts, Taylor A.
Gavvalapalli, Nagarjuna
author_sort Jones, Dorothy K.
collection PubMed
description [Image: see text] Graphene nanoplatelets (GNPs) are stable and relatively inexpensive compared to single-layer graphene sheets and carbon nanotubes and are useful in diverse electronic, optoelectronic, and mechanical applications. Solution-state processing of the active material is desired in most of the applications mentioned above, and thus, there is great interest in increasing the concentration and stability of GNP suspension. Herein, to elucidate the role of the stabilizer structural parameters on the concentration and stability of GNP dispersions, we synthesized and used a series of aryl amphiphiles (ArAs) of varying aryl hydrophobe sizes and geometries. The ArAs were found to generate GNP dispersions with concentrations ranging from 0.05 to 0.13 mg mL(–1) depending on the size of the aryl hydrophobe. The ArAs’ hydrophobe size played a key role in determining the concentration of GNP suspension, while ArAs’ critical aggregation concentration and solubility limits had no impact on the GNP suspension concentration. Most of the studied ArAs work similar to methylcellulose, the previously reported best performing stabilizer . Moreover, the ArAs stabilized the GNP suspension better than methylcellulose and were able to form stable dispersions for up to 6 h. Raman studies indicate that the quality of the GNPs did not degrade during the dispersion process. These findings will aid in the development of design rules for next-generation stabilizers.
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spelling pubmed-83403922021-08-06 Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions Jones, Dorothy K. Watts, Taylor A. Gavvalapalli, Nagarjuna ACS Omega [Image: see text] Graphene nanoplatelets (GNPs) are stable and relatively inexpensive compared to single-layer graphene sheets and carbon nanotubes and are useful in diverse electronic, optoelectronic, and mechanical applications. Solution-state processing of the active material is desired in most of the applications mentioned above, and thus, there is great interest in increasing the concentration and stability of GNP suspension. Herein, to elucidate the role of the stabilizer structural parameters on the concentration and stability of GNP dispersions, we synthesized and used a series of aryl amphiphiles (ArAs) of varying aryl hydrophobe sizes and geometries. The ArAs were found to generate GNP dispersions with concentrations ranging from 0.05 to 0.13 mg mL(–1) depending on the size of the aryl hydrophobe. The ArAs’ hydrophobe size played a key role in determining the concentration of GNP suspension, while ArAs’ critical aggregation concentration and solubility limits had no impact on the GNP suspension concentration. Most of the studied ArAs work similar to methylcellulose, the previously reported best performing stabilizer . Moreover, the ArAs stabilized the GNP suspension better than methylcellulose and were able to form stable dispersions for up to 6 h. Raman studies indicate that the quality of the GNPs did not degrade during the dispersion process. These findings will aid in the development of design rules for next-generation stabilizers. American Chemical Society 2021-07-21 /pmc/articles/PMC8340392/ /pubmed/34368591 http://dx.doi.org/10.1021/acsomega.1c03126 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Jones, Dorothy K.
Watts, Taylor A.
Gavvalapalli, Nagarjuna
Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions
title Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions
title_full Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions
title_fullStr Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions
title_full_unstemmed Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions
title_short Role of Aryl Amphiphile Hydrophobe Size on the Concentration and Stability of Graphene Nanoplatelet Dispersions
title_sort role of aryl amphiphile hydrophobe size on the concentration and stability of graphene nanoplatelet dispersions
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8340392/
https://www.ncbi.nlm.nih.gov/pubmed/34368591
http://dx.doi.org/10.1021/acsomega.1c03126
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