Development of multifunctional nanocomposites

• Grant number: 19/13871-6
• Support Opportunities: Regular Research Grants
• Duration: February 01, 2021 - July 31, 2023
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Peter Hammer
• Grantee: Peter Hammer
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated researchers: Andressa Trentin ; Marina Magnani ; Samarah Vargas Harb

Abstract

The project focuses on the development and characterization of advanced materials based on organic-inorganic hybrid nanocomposites used to protect metallic components, continuing the research conducted by the group over the past 12 years. The main objective of this work is to correlate, according to the preparation conditions, the electronic, structural and morphological characteristics with the thermal, mechanical and electrochemical properties of poly (methyl methacrylate) (PMMA) and epoxy resin nanocomposites covalently bonded with different inorganic phases (SiO2, TiO2, ZrO2 and CeO2). Specific research activities include: i) studying epoxy silica, PMMA-CeO2 and PMMA-silica hybrid films modified with corrosion inhibitors (Ce (III), Ce (IV) and Li) in terms of the physicochemical mechanisms resulting in the self-healing functionality, essential property for active protection of carbon steel and aluminum alloys (AA2024 and AA7075), widely used in the oil and aeronautics industry; ii) deposit hybrid coatings in an optimized process on 3D metal components for industrial application in the naval and aerospace area. In these researches the techniques of X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, nuclear magnetic resonance (NMR), low angle X-ray scattering (SAXS), X-ray absorption spectroscopy (XAS), as well as electron (SEM/EDS, TEM) and atomic force (AFM) microscopies will play a central role in characterizing the structural and morphological properties of the nanocomposites. The optical, thermal and mechanical characteristics will be studied using UV-Vis spectroscopy, thermogravimetry, adhesion and scratch resistance tests, respectively. Electrochemical assays, carried out using electrochemical impedance spectroscopy (EIS) and polarization curves, will be combined with SEM/EDS and XPS to evaluate the self-healing ability of active coatings after long-term immersion in neutral saline and alkaline solutions. In addition, the Photoelectron Spectroscopy Laboratory (LEFE) project of the Materials Physics-Chemistry Group (GPQM) will be continued in the multi user mode. (AU)

Scientific publications

(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)

HARB, V, SAMARAH; RODRIGUES, MARIANA S.; DE SOUZA, THIAGO A. C.; TRENTIN, ANDRESSA; UVIDA, MAYARA C.; POCHAPSKI, DANIEL J.; PULCINELLI, SANDRA H.; SANTILLI, V, CELSO; HAMMER, PETER. Smart PMMA-cerium oxide anticorrosive coatings: Effect of ceria content on structure and electrochemical properties. Progress in Organic Coatings, v. 161, DEC 2021. (15/11907-2, 15/09342-7, 19/13871-6)