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Layer by layer films of polypyrrol and magnetite nanoparticles in the analytical determination of parabens

Grant number: 18/04061-8
Support type:Scholarships in Brazil - Master
Effective date (Start): September 01, 2018
Effective date (End): February 29, 2020
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Marystela Ferreira
Grantee:Lucas Felipe de Lima
Home Institution: Centro de Ciências e Tecnologias para a Sustentabilidade (CCTS). Universidade Federal de São Carlos (UFSCAR). Sorocaba , SP, Brazil


Nowadays, the presence of chemical compounds that promove damage to human health and other organisms is a major problem. This problem it comes specially when to hormonal disrupters that have estrogenic activity in metabolism. Parabens are one of the compounds classes that deserves attention due to its intense estrogenic activity which is found in the majority of foods, cosmetics, cleaning and pharmaceutical products, among others, These compounds are widely used in food industries as preservatives and due their antimicrobial activity. However adverse effects have been observed, due to their ability to trigger certain hormonal changes that increase the chances of developing cancers in the breasts, prostate and ovary, as well as the decrease in mobility of spermatozoa. Based on this problem, it is essential to develop a fast, easy and low cost method to determine the concentration of parabens in environmental, medicines and foods samples. LbL (Layer-by-Layer) technique that has been highlighted due to its simplicity and ease of manufacture and the development of electrochemical sensors. LbL method consists of the adsorption of polyelectrolytes on an electrically charged substrate, only by a sequence of cationic and anionic solutions in beakers, resulting in bilayers film having unique properties, allowing the molecules of the analyte of interest to be adsorbed by Van der Waals and electrostatic interactions. In this project, LbL films will be formed with magnetite nanoparticles and polypyrrole. The film will be characterized by spectroscopic techniques (infrared and ultraviolet) and electrochemical techniques such as Differential Pulse Voltammetry (DPV), Electrochemical Impedance Spectroscopy (EIS) and for validation of the Capillary Electrophoresis (CE) sensing method. The films will also be analyzed morphologically by SEM and EDX. (AU)

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Scientific publications (5)
(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)
DE LIMA, LUCAS F.; FERREIRA, ANDRE L.; MACIEL, CRISTIANE C.; FERREIRA, MARYSTELA; DE ARAUJO, WILLIAM R. Disposable and low-cost electrochemical sensor based on the colorless nail polish and graphite composite material for tartrazine detection. Talanta, v. 227, MAY 15 2021. Web of Science Citations: 1.
DE LIMA, LUCAS F.; MACIEL, CRISTIANE C.; FERREIRA, ANDRE L.; RUBIRA, RAFAEL J. G.; CONSTANTINO, CARLOS J. L.; FERREIRA, MARYSTELA. An investigation of the synergistic effect between magnetite nanoparticles and polypyrrole in nanostructured layer-by-layer films. Journal of Applied Polymer Science, v. 138, n. 5 AUG 2020. Web of Science Citations: 0.
DE LIMA, LUCAS F.; PEREIRA, ELISABETE A.; FERREIRA, MARYSTELA. Electrochemical sensor for propylparaben using hybrid Layer-by-Layer films composed of gold nanoparticles, poly(ethylene imine) and nickel(II) phthalocyanine tetrasulfonate. SENSORS AND ACTUATORS B-CHEMICAL, v. 310, MAY 1 2020. Web of Science Citations: 0.
DE LIMA, LUCAS F.; DAIKUZONO, CRISTIANE M.; MIYAZAKI, CELINA M.; PEREIRA, ELISABETE A.; FERREIRA, MARYSTELA. Layer-by-Layer nanostructured films of magnetite nanoparticles and polypyrrole towards synergistic effect on methylparaben electrochemical detection. Applied Surface Science, v. 505, MAR 1 2020. Web of Science Citations: 2.
DE LIMA, LUCAS F.; MACIEL, CRISTIANE C.; FERREIRA, ANDRE L.; DE ALMEIDA, JESSICA C.; FERREIRA, MARYSTELA. Nickel (II) phthalocyanine-tetrasulfonic-Au nanoparticles nanocomposite film for tartrazine electrochemical sensing. Materials Letters, v. 262, MAR 1 2020. Web of Science Citations: 0.

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