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Study on the influence of synthesis conditions on the properties of pure and Ce(IV) modified organic-inorganic hybrids

Grant number: 14/09547-5
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): August 01, 2014
Effective date (End): April 30, 2018
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Peter Hammer
Grantee:Fábio Cesar dos Santos
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
Associated scholarship(s):16/02201-1 - X-ray absorption investigation of the local structural and electronic properties of cerium doped organic-inorganic hybrid coatings, BE.EP.DR

Abstract

The project proposes to investigate the relationship between structure and properties of organic-inorganic hybrids of siloxane-methacrylate system prepared by sol-gel process. In addition to the structural changes in the hybrid matrix, as a ratio between the organic and inorganic phase, will be studied the effects of cerium (IV) doping in the formation of a hybrid network and as the anti-corrosive properties of the material. The response surface methodology (RSM) will be used as a tool to evaluate the effects of synthesis parameters, on structural characteristics and final properties of the material. Matrices considered most suitable, will be modified with different concentrations of cerium ions to study the formation of the hybrid phase and the relationship between structure and anti-corrosion efficiency of coatings used to protect metallic surfaces. The hybrids will be prepared from the polymerization of methyl methacrylate (MMA) with the coupling agent 3-(Trimethoxysilyl)propyl methacrylate (MPTS), and hydrolysis and condensation of tetraethoxysilane (TEOS) with MPTS. Nuclear magnetic resonance (NMR) , photoelectron spectroscopy (XPS) , Raman spectroscopy and thermogravimetry (TG) will be used to investigate the structural properties. Electrochemical Impedance Spectroscopy (EIS) and polarization measurements will be used to evaluate the corrosion resistance of coated samples after long-term exposure to salt and salt / acid environments. (AU)

Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SANTOS, Fábio Cesar dos. Estudo da influência das condições de síntese nas propriedades de híbridos orgânico-inorgânicos puros e modificados por Ce(IV). 2018. 137 f. Doctoral Thesis - Universidade Estadual Paulista "Júlio de Mesquita Filho" Instituto de Química..

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