DEVELOPMENT OF A METHODOLOGY FOR EVALUATING AND PREDICTING THE LIMITING OF NANOMATERIAL DISPERSIONS IN LIQUID MEDIA

Published in 12/12/2023 - ISBN: 978-65-272-0088-8

Paper Title
DEVELOPMENT OF A METHODOLOGY FOR EVALUATING AND PREDICTING THE LIMITING OF NANOMATERIAL DISPERSIONS IN LIQUID MEDIA
Authors
  • Gabriel Francisco Teixeira de Oliveira
  • Danilo dos Santos
  • Guilherme Kubo Ribeiro
  • Giovani Fornereto Gozzi
Modality
Pôster
Subject area
Síntese e caracterização de materiais
Publishing Date
12/12/2023
Country of Publishing
Brasil
Language of Publishing
Inglês
Paper Page
https://www.even3.com.br/anais/workshop-do-ineo-2023/613961-development-of-a-methodology-for-evaluating-and-predicting-the-limiting-of-nanomaterial-dispersions-in-liquid-med
ISBN
978-65-272-0088-8
Keywords
nanomaterials, printed electronics, dispersion
Summary
The class of equipment or equipment third place in the ranking of construction in Brazilian economy 2010, weighing the elevator in the trade balance. Foreign trade revealed that Data Brazil has a large consumer market for technological products and, at the same time, has less than 9% of its industry categorized as high technological intensity. To reverse this situation, it was identified that the electronics and chemical segments demand greater technological development in Brazil. Both identified labels are included in this project. In this context, the present project aims at the development of new chemical and electronic products of high technological intensity together with the national industry. The project was developed in conjunction with the TICON (Conductive Ink Industry), which produces silver pastes for applications in printed electronics. The ability to control the electronic properties of a material through externally applied voltage is at the heart of modern electronics. In many cases, it is the effect of the electric field that allows varying the concentration of charge carriers in a semiconductor device and, consequently, causing an electric current through it. As the semiconductor industry approaches the performance limit of silicon-based technologies, the transition to new materials whose properties are controlled by an electric field is inevitable [NOVOSELOV, 2004]. In this context, conductive carbon materials emerge as promising candidates for electronics, which can replace metallic materials. Although carbon and silver-based nanomaterials are promising for the development of conductive formulations, the low concentration of the dispersions of these materials is a limitation to the technological application. In this sense, several studies have been carried out with the objective of developing means of dispersion for these materials [WANG, P, 2021], which is the specific field of the present project. In this project we intend to correlate the limiting concentration of dispersion of mano-materials, graphene, carbon nanotubes and silver nanoparticles, with the properties of different dispersion media. Therefore, we will determine the scattering threshold concentrations of nanomaterials in different media using the thermogravimetric and optical absorption technique [Toso, 2017] . Concentrated suspensions (beyond the limit concentration) will be prepared by the ultrasonic tip dispersion technique (Vibra - Cell VCX 130PB). Then, these suspensions will be submitted to the centrifugation process at 3000 RPM (Excelsa II model 206 BL) during different periods. In this process, there will be a gradual decantation of the agglomerates, resulting in increasingly stable suspensions. Then, the concentrations of the suspensions will be determined by the optical absorption technique for the different centrifugation times and, from this result, the limit concentration of each of the suspensions will be determined by extrapolation to infinite centrifugation time. Additionally, samples will be taken to compare the concentrations determined by the optical absorption technique with those obtained by the thermogravimetric technique. These data will be analyzed according to the solubility theory of the literature [BURKE, J., 1984]. For this purpose, we will use solvents from different groups (water, glycols, alcohols, esters, ketones, chlorinated compounds, aliphatics, etc.), with different Hansen parameters, for the dispersion of nanomaterials. In this way, the limit concentration of nanomaterials in different media will be analyzed in triangle graphs, allowing the identification of the combination of Hansen parameters that result in more concentrated dispersions. As a result of this study, we intend to identify how to control the properties of the liquid medium to maximize the limiting concentration of the dispersion of the studied nanomaterials. Thus, the present study will allow the identification of polymeric solutions and additives that result in stable dispersions of conductive nanomaterials for application in electronics.
Title of the Event
Workshop do INEO 2023
City of the Event
Nazaré Paulista
Title of the Proceedings of the event
Anais do Workshop INEO 2023
Name of the Publisher
Even3
Means of Dissemination
Meio Digital
DOI
LinkGet DOI

How to cite

OLIVEIRA, Gabriel Francisco Teixeira de et al.. DEVELOPMENT OF A METHODOLOGY FOR EVALUATING AND PREDICTING THE LIMITING OF NANOMATERIAL DISPERSIONS IN LIQUID MEDIA.. In: Anais do workshop INEO 2023. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2023. Available in: https//www.even3.com.br/anais/workshop-do-ineo-2023/613961-DEVELOPMENT-OF-A-METHODOLOGY-FOR-EVALUATING-AND-PREDICTING-THE-LIMITING-OF-NANOMATERIAL-DISPERSIONS-IN-LIQUID-MED. Access in: 14/06/2024

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