| Grant number: |
15/09342-7
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| Support type: | Scholarships in Brazil - Doctorate |
| Effective date (Start): |
December 01, 2015
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| Effective date (End): |
April 30, 2019
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| Field of knowledge: | Engineering
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Materials and Metallurgical Engineering
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Nonmetallic Materials |
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| Principal Investigator: | Peter Hammer |
| Grantee: | Samarah Vargas Harb |
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| Home Institution: |
Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
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| Associated scholarship(s): | 17/02899-1 - Biocompatibility analysis of PMMA-TiO2 and PMMA-ZrO2 organic-inorganic hybrids coatings deposited on Ti6Al4V titanium alloy,
BE.EP.DR
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Abstract
Using the sol-gel process organic-inorganic hybrids consisting of poly(methyl methacrylate) (PMMA) covalently bonded to different inorganic phases (TiO2, ZrO2 and CeO2) will be synthesized aiming to obtain multifunctional hybrids systems that combine properties such as high mechanical strength, thermal stability, photocatalytic activity and excellent anticorrosive characteristics. The first part of the project aims the sol-gel synthesis of the inorganic phases and characterization by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS). The second part involves the synthesis of hybrids from radical polymerization of methyl methacrylate (MMA) with the coupler agent 2-hydroxyethyl methacrylate (2-HEMA), and subsequent addition of different fractions of the inorganic phase. The hybrids will be deposited by dip-coating on aluminum alloy, carbon steel and stainless steel substrates. The structural characterization will be performed by SAXS, X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FTIR), atomic force microscopy (AFM) and TEM. For thermal analysis hermogravimetry (TG) and differential scanning calorimetry (DSC) will be applied, and to study the optical properties UV-Vis spectroscopy will be used. Electrochemical impedance spectroscopy (EIS) will be applied to evaluate the anti-corrosion efficiency of the coatings after long-term exposure in aggressive environment. Photocatalytic tests of the PMMA-TiO2 system will be conducted by degradation of a model dye using UV radiation and sunlight. The mechanical characterization by nanoindentation and analysis of UV radiation stability of the hybrids will be realized in an internship abroad.
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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)
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, 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: 4.
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.