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Structure and electrochemical properties of PMMA-silica hybrid coatings modified with cerium and lithium ions

Grant number: 15/11907-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): September 01, 2015
Effective date (End): October 31, 2019
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal Investigator:Peter Hammer
Grantee:Andressa Trentin
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Associated scholarship(s):17/14061-2 - Influence of Ce(iii) and Ce(IV) ions on the structural and electrochemical characteristics of PMMA-silica hybrid coatings, BE.EP.DR

Abstract

Organic-inorganic hybrid coatings modified with cerium ions will be prepared by the sol-gel process in order to perform a structural and electrochemical investigation. The effect of different concentrations of Ce(III) and Ce(IV) ions in the inorganic phase will be studied focusing on the following aspects: formation and structure of the hybrid network, anti-corrosion properties and the "self-healing" effect. The organic-inorganic hybrid coatings, based on methyl polymethacrylate (PMMA) covalently bonded with the inorganic silica phase, containing different concentrations of cerium, will be deposited on carbon steel and aluminum alloy substrates by dip coating. The structural characterization will be carried out by nuclear magnetic resonance spectroscopy (NMR) 29Si and 13C, X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine structure (EXAFS), small angle X-ray scattering (SAXS), combined with morphological analysis by atomic force microscopy (AFM), scanning electron microscopy (FEG-SEM) and optical microscopy. For analysis of thermal properties thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) will be used. The corrosion protection efficiency of the coatings and the "self-healing" effect of artificially damaged samples will be investigated before and after immersion in saline and saline/acid medium by electrochemical impedance spectroscopy (EIS), polarization curves and the scanning vibrating electrode technique (SVET), the latter performed during the internship abroad.

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)
HARB, SAMARAH VARGAS; UVIDA, MAYARA CARLA; TRENTIN, ANDRESSA; LOBO, ANDERSON OLIVEIRA; WEBSTER, THOMAS JAY; PULCINELLI, SANDRA HELENA; SANTILLI, CELSO VALENTIM; HAMMER, PETER. PMMA-silica nanocomposite coating: Effective corrosion protection and biocompatibility for a Ti6Al4V alloy. Materials Science & Engineering C-Materials for Biological Applications, v. 110, MAY 2020. Web of Science Citations: 0.
HARB, SAMARAH VARGAS; TRENTIN, ANDRESSA; CARNEIRO DE SOUZA, THIAGO AUGUSTO; MAGNANI, MARINA; PULCINELLI, SANDRA HELENA; SANTILLI, CELSO VALENTIM; HAMMER, PETER. Effective corrosion protection by eco-friendly self-healing PMMA-cerium oxide coatings. CHEMICAL ENGINEERING JOURNAL, v. 383, MAR 1 2020. Web of Science Citations: 0.
HARB, V, SAMARAH; TRENTIN, ANDRESSA; UVIDA, MAYARA C.; MAGNANI, MARINA; PULCINELLI, SANDRA H.; SANTILLI, V, CELSO; HAMMER, PETER. A comparative study on PMMA-TiO2 and PMMA-ZrO2 protective coatings. Progress in Organic Coatings, v. 140, MAR 2020. Web of Science Citations: 0.
TRENTIN, ANDRESSA; GASPARINI, ANDRESSA DE L.; FARIA, FLAVIO A.; HARB, V, SAMARAH; DOS SANTOS, FABIO C.; PULCINELLI, SANDRA H.; SANTILLI, V, CELSO; HAMMER, PETER. Barrier properties of high performance PMMA-silica anticorrosion coatings. Progress in Organic Coatings, v. 138, JAN 2020. Web of Science Citations: 0.
TRENTIN, ANDRESSA; HARB, SAMARAH V.; UVIDA, MAYARA C.; PULCINELLI, SANDRA H.; SANTILLI, CELSO V.; MARCOEN, KRISTOF; PLETINCX, SVEN; TERRYN, HERMAN; HAUFFMAN, TOM; HAMMER, PETER. Dual Role of Lithium on the Structure and Self-Healing Ability of PMMA-Silica Coatings on AA7075 Alloy. ACS APPLIED MATERIALS & INTERFACES, v. 11, n. 43, p. 40629-40641, OCT 30 2019. Web of Science Citations: 0.
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
TRENTIN, Andressa. Estrutura e propriedades eletroquímicas de revestimentos híbridos PMMA-sílica modificados com íons cério e lítio. 2019. Doctoral Thesis - Universidade Estadual Paulista "Júlio de Mesquita Filho" Instituto de Química..

Please report errors in scientific publications list by writing to: cdi@fapesp.br.