SONIA REGINA HOMEM DE MELLO CASTANHO

SONIA REGINA HOMEM DE MELLO CASTANHO

(Fonte: Lattes)

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Graduada em Engenharia de Materiais (UFSCar, Universidade Federal de São Carlos), Mestre em Tecnologia Nuclear (IPEN/USP, Universidade de São Paulo) e Doutora em Ciências Químicas-Cerâmicos (UAM/ES -ICV/CSIC, Universidad Autónoma de Madrid, Espanha e Instituto de Ceramica y Vidrio/CSIC de Espanha). Ela é Pesquisadora Senior e atualmente Gestora Adjunta em Pesquisa e Desenvolvimento do Centro de Ciências e Tecnologia de Materiais (CCTM) do Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP). É Professora da Universidade de São Paulo (USP), no programa de posgraduação Tecnologia Nuclear - Materiais. Coordenadora do grupo de pesquisas (GP/CNPq) em Materiais e Meio Ambiente. Principais áreas de atuação: - Energias Renováveis (células a combustível, catalizadores e biomassa), - Ambiental (mitigação, inertização e requalificação de efluentes e subprodutos de processos extrativistas e industriais, diretivas ambientais (RhOS, WEEE)), - Cerâmicas Biocompatíveis (vidros, compósitos multifuncionais para a implantologia). Experiência em gestão de Centro de Pesquisas, gestão ambiental, gestão de projetos, planejamento composicional de materiais, processamento coloidal, reologia, vidros e vitroceramicos, compósitos multifuncionais e nanoestruturas naturais. (Texto extraído do Currículo Lattes em 27 dez. 2021)

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Biocide glass based on Nb2O5-SiO-CaO-Na2O system
2016 - SANTOS, FELIPE A.; SILVA, ANTONIO C.; SANTOS, CLAUDINEI; SIMBA, BRUNO G.; BARTOLOME, JOSE F.; DURAN, TERESA; FERNANDEZ-GARCIA, ELISA; ROGERO, SIZUE O.; MELLO-CASTANHO, SONIA R.H.
In this work,glasses based on SiO-CaO-Na2O system containing different Nb2O5 contents were developed. Glasses were melted at 1500 °C and quenched in a metallic mould. Citotoxicity tests were performed using neutral red uptake methodology and indicated normal cell growth, which enables the use as biomaterial. Biocide activity was evaluated through glass incubation in bacterial suspension (Escherichia coli) at 37 °C under shaking. The composition with higher content of SiO2 and lower content of Nb2O5 presented higher biocide activity and the coefficient of thermal expansion indicate thermal compatibility with stainless steel 316L and titanium alloys.
High chemical stability of stoneware tiles containing waste metals
2010 - REINOSA, J.J.; SILVA, A.C.; RUBIO-MARCOS, F.; MELLO CASTANHO, S.R.H.; MOYA, J.S.; FERNANDEZ, J.F.
Stoneware tiles were produced by the incorporation of galvanic waste to industrial compositions that were processed from kaolinitic clay, feldspar, quartz and recycled domestic glass. The galvanic waste required a calcination step to eliminate the gas forming species prior to its incorporation into industrial processes and crystalline phases were formed. After that, the effective incorporation of metals from the galvanic waste was attained through the formation and the refinement of crystalline phases that acted as pigments. During the fast firing the calcined galvanic waste only got partially dissolved in the liquid phase that developed in spinel phase nanocrystals. The followed procedure allowed to effective immobilization of up to 10 wt% of waste with heavy metals in a porcelain stoneware that satisfy both the mechanical and the chemical standards required to massively commercialize such a product
Mechanism of calcium lixiviation in soda-lime glasses with a strong biocide activity
2012 - MOYA, J.S.; CABAL, B.; SANZ, J.; SILVA, A.C. da; MELLO CASTANHO, S.; TORRECILLAS, R.; ROJO, F.
Vitrified galvanic waste chemical stability
2007 - SILVA, A.C.; CASTANHO, S.R.H.M.
Incorporation of galvanic waste (Cr, Ni, Cu, Zn, Pb) in a soda-lime-borosilicate glass
2008 - SILVA, A.C.; MELLO-CASTANHO, S.; GUITIAN, F.; MONTERO, I.; ESTEBAN-CUBILLO, A.; SOBRADOS, I.; SANZ, J.; MOYA, J.S.
In the present investigation, a glassing process for galvanic waste (GW) incorporation with a high chemical stability is presented. Glasses with up to 50 wt% of galvanic solid waste by modifications in the basic composition of soda–lime–borosilicate glasses were prepared. After fusing at temperatures up to 1300°C, the glasses were characterized by inductively coupled plasma, scanning electron microscopy/energy-dispersive X-ray spectroscopy, high-temperature microscopy, transmission and reflected light microscopy, nuclear magnetic resonance, X-ray photoelectron spectroscopy, and X-ray diffraction methods. The chemical stability was evaluated by hydrolytic attack assays. Glasses containing up to 40 wt% of GW with a very high chemical stability, similar to bottle glasses, were obtained.
A viscoelastic approach from 'alfa'-Alsub(2)Osub(3) suspensions with high solids content
2013 - SETZ, LUIZ F.G.; SILVA, ANTONIO C.; SANTOS, SILAS C.; MELLO CASTANHO, SONIA R.H.; MORELLI, MARCIO R.