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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Engineering the surface of carbon-based nanomaterials for dispersion control in organic solvents or polymer matrices

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de Oliveira, Thais C. [1] ; Ferreira, Filipe V. [2] ; de Menezes, Beatriz R. C. [1] ; da Silva, Diego M. [1, 3] ; dos Santos, Alan S. [1] ; Kawachi, Elizabete Y. [1] ; Simonetti, Evelyn A. N. [1, 3] ; Cividanes, Luciana S. [1]
Total Authors: 8
[1] Aeronaut Inst Technol ITA, Fundamental Sci Div, Sao Jose Dos Campos, SP - Brazil
[2] Univ Campinas UNICAMP, Sch Chem Engn, Campinas, SP - Brazil
[3] Fed Inst Educ Sci & Technol Sao Paulo IFSP, Dept Chem, Sao Jose Dos Campos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Web of Science Citations: 0

The surface modification of carbon-based nanomaterials, including carbon nanotubes (CNTs) and graphene oxide (GO), is advantageous for tailoring their dispersion in different solvents, as well as polymer matrices. Although the surface modification methodology of such nanomaterials is well established, the relationship between functionalization and interaction with the surrounding environment (solvents or polymers) - particularly repulsion/attraction forces that govern the clusters' formation - is still not well understood to date. Herein, the dispersion of pristine and oxygenated/amino-functionalized CNTs and GO in different solvents were studied qualitatively (by optical microscopy and visual observations of dispersion tests) and quantitatively (by UV-Vis spectroscopy), and the repulsion/attraction process was explained based on pi-pi{*} transitions between CNT or GO and solvents. We found that both CNT and GO can have good dispersion in water, N-methyl-2-pyrrolidone (NMP), and N,N-dimethylformamide (DMF), and the key to this behavior is the precise functionalization control, including orientation and type of functional group. In this sense, the introduction of functional groups improves the interaction quality of CNT and GO due to nanoscale attraction, and at the same time, enhances their orientation due to steric effect. The present study is expected to contribute to carbon-based nanomaterials' surface engineering, which may be useful for researchers from different fields, such as carbon nanostructures, materials chemistry, and polymer nanocomposites. (AU)

FAPESP's process: 17/02846-5 - AgVO3/PMMA Nanocomposites: Effect of functionalization with acrilamide on mechanical and antimicrobial properties
Grantee:Beatriz Rossi Canuto de Menezes Rodrigues
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 19/13723-7 - Nanocomposite coatings obtained by sol-gel for adhesion and protection against corrosion of aluminum alloys
Grantee:Luciana de Simone Cividanes Coppio
Support Opportunities: Regular Research Grants
FAPESP's process: 19/23844-6 - Study of the functionalization effect of carbonaceous materials for the production of HDPE nanocomposites for aerospace applications
Grantee:Thais Cardoso de Oliveira
Support Opportunities: Scholarships in Brazil - Master