Biodegradation as treatment proposal and recovery of carbon nanotubes arising from residues of biodegradable polymeric nanocomposites

• Grant number: 19/15976-0
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2020
• End date: March 31, 2023
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Ana Paula Lemes
• Grantee: Ana Paula Lemes
• Host Institution: Instituto de Ciência e Tecnologia (ICT). Universidade Federal de São Paulo (UNIFESP). Campus São José dos Campos. São José dos Campos , SP, Brazil
• Associated researchers: Andrey dos Santos ; Danielle Maass ; Mirabel Cerqueira Rezende ; Nelson Manuel Viana da Silva Lima ; Wilson Jose Fernandes Lemos Junior

Abstract

The aim of this project will be to investigate the carbon nanotubes (CNT) recovery from biodegradable polymer nanocomposites with CNT, and the use of these recovered CNT (CNT-rec) in the production of new polymer nanocomposites. Therefore, the polymer nanocomposites will be produced through biodegradable polymer in different CNT concentrations such as 1 and 2% (w/w). These nanocomposites will be characterized by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy - field emission gun (SEM-FEG), tensile tests and electrical conductivity measurements. After that, biodegradation process of nanocomposites will be carried out in a bioreactor. In order to evaluate the effect of CNT in microbiota during biodegradation process, Omics technology such as "Next Generation Sequencing" will be used. At the end of biodegradation process, the CNT recovered from final residue of biodegradation process will be analyzed according to a thermal treatment or acid treatment for their purification and, after they will be characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, atomic force microscopy (AFM) and x-ray diffraction (XRD). A NTC toxicity study will be also done using miniaturized in vitro assay with ciliate protozoan Tetrahymena pyriformis. To evaluate the possibility to use the CNT-rec in the production of new nanocomposites, the CNT-rec will be use in the production of biodegradable polymer/CNT-rec 1% and 2% (w/w) nanocomposites that will be characterized as describe before. The comparation between these properties will provide very important information about the preservation of CNT properties and their reuse, which will allow to verify the efficiency of the treatment proposed in this project for the residue generated by these nanocomposites. (AU)

Scientific publications

(6)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SILVA, A. P. B.; MONTAGNA, L. S.; PASSADOR, F. R.; REZENDE, M. C.; LEMES, A. P.. Biodegradable nanocomposites based on PLA/PHBV blend reinforced with carbon nanotubes with potential for electrical and electromagnetic applications. EXPRESS POLYMER LETTERS, v. 15, n. 10, p. 987-1003, OCT 2021. (19/15976-0)

DA SILVA, ANA PAULA BERNARDO; GIROTTO, CASSIA COSTA; MONTANHEIRO, THAIS LARISSA AMARAL; DE FARIAS, MARCELO ALEXANDRE; MONTAGNA, LARISSA STIEVEN; TADA, DAYANE BATISTA; CRISTOVAN, FERNANDO HENRIQUE; LEMES, ANA PAULA. Evaluation of the use of carbon nanotubes recovered from a biodegradation process in the production of new biodegradable polymer nanocomposites. EXPRESS POLYMER LETTERS, v. 17, n. 2, p. 18-pg., 2023-02-01. (19/15976-0, 17/24873-4)

DE FREITAS, AMANDA DE S. M.; RODRIGUES, JESSICA S.; MACIEL, CRISTIANE C.; PIRES, ARIANE A. F.; LEMES, ANA PAULA; FERREIRA, MARYSTELA; BOTARO, VAGNER R.. mprovements in thermal and mechanical properties of composites based on thermoplastic starch and Kraft Ligni. International Journal of Biological Macromolecules, v. 184, p. 863-873, AUG 1 2021. (19/19401-1, 19/15976-0)

DE FREITAS, AMANDA DE SOUSA MARTINEZ; DA SILVA, ANA PAULA BERNARDO; MONTAGNA, LARISSA STIEVEN; NOGUEIRA, IURY ARAUJO; CARVALHO, NATHAN KEVIN; DE FARIA, VITOR SIQUEIRA; DOS SANTOS, NATALI BOMFIM; LEMES, ANA PAULA. Thermoplastic starch nanocomposites: sources, production and applications - a review. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION, DEC 2021. (19/15976-0, 19/15888-3, 19/15957-5)

DE FREITAS, AMANDA DE S. M.; RODRIGUES, JESSICA S.; BOTARO, VAGNER R.; LEMES, ANA PAULA; CRUZ, SANDRA ANDREA; WALDMAN, WALTER R.. Formation of craze-like pattern in polypropylene UV-induced surface cracking. JOURNAL OF POLYMER RESEARCH, v. 29, n. 12, p. 8-pg., 2022-12-01. (16/24936-3, 19/15976-0, 19/19401-1)

CARVALHO, NATHAN K.; SILVA, ANA P. B.; LEMES, ANA P.. Effects of tributyrin as plasticizer in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) on processability, mechanical, and thermal properties. Journal of Applied Polymer Science, v. 140, n. 32, p. 9-pg., 2023-05-31. (19/15957-5, 19/15976-0)