MARCELO MIYADA REDÍGOLO

MARCELO MIYADA REDÍGOLO

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Cadernos de Ciência da Conservação
2020 - REDÍGOLO, MARCELO; COSTA, ISOLDA; VEGA, OSCAR
Material characterization of exudates from Brazilian contemporary oil painting by FTIR, Py-GC/MS and SEM-EDS
2020 - REDÍGOLO, M.M.; ALVES, M.V.R.; REIS, T.R. dos; CARNEIRO, T.C.; COSTA, I.; BUSTILLOS, O.V.
Contemporary art has employed almost every single synthetic material created by man. Nonetheless, the appeal of oil paint is still present at most public and private collections. Oil paint manufacture has evolved over time along with its formulation and conservation concerns. A reported problem is the formation of exudates on contemporary oil paintings. This work aims to characterize exudates from the Brazilian oil painting “Três pessoas” (1999), by Marina Saleme. Characterization was carried out by Fourier transform infrared spectroscopy, pyrolysis coupled to gas chromatography and mass spectrometry and scanning electron microscopy coupled to energy dispersive x-ray fluorescence spectrometry. Results indicate that exudates are formed by the oxidation of linseed oil and formation of dicarboxylic acids. This process is aided by the formation of zinc stearate in the paint film.
A multi-analytical study of Brazilian commercial acrylic paint of artistic use
2019 - REDÍGOLO, MARCELO M.; ALVES, MARCOS V.R.; COSTA, ISOLDA; BUSTILLOS, OSCAR V.
Contemporary Brazilian artists worked massively with paints made in Brazil. Conservation of acrylic paints is an issue and has been studied for the past two decades. European and North American paints were studied in detail, but there is scarce information on paints produced in other countries. Therefore, it is vital to characterize Brazilian artist paint and better understand their ageing process, outlining proper conservation methodologies then. Complementary analytical techniques were employed to characterize the paint samples, namely pyrolysis gas chromatography-mass spectrometry (Py-GC/MS), Fourier transform infrared (FTIR) and Raman spectroscopies and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS). Results indicate that Brazilian acrylic blue paints (phthalocyanine and Prussian) are composed of polystyrene (PS) copolymers, in contrast to imported paints, mainly composed of poly(metyhl methacrylate) (PMMA) copolymers.
Caracterização química multitécnicas de tintas artísticas brasileiras, um estudo de caso
2018 - REDIGOLO, MARCELO M.
O presente trabalho apresenta a caracterização química de tintas artísticas brasileiras. Diferente de outras matrizes, os materiais de arte fabricados no Brasil não apresentam informações na literatura que auxiliem em sua conservação e restauração. Amostras de tintas acrílicas e a óleo, nacionais e importadas, foram analisadas pelas técnicas espectroscópicas Raman e infravermelho por transformada de Fourier (FTIR), pirólise acoplada a cromatografia a gás e espectrometria de massas (Py-GC/MS) e microscopia eletrônica de varredura acoplada a espectrometria de fluorescência de raios X (SEM-EDS). Resultados de análise indicam que tintas acrílicas brasileiras são compostas por poliestireno (PS), diferentemente das importadas, compostas por polimetilmetacrilato (PMMA). Enquanto as tintas a óleo apresentam composição semelhante (óleo de linhaça), brasileiras e importadas. Duas pinturas do acervo da Pinacoteca do Estado de São Paulo foram selecionadas para um estudo de caso. As obras apresentam a formação de exsudatos em sua superfície, o que demanda a caracterização química como etapa anterior ao desenvolvimento de uma metodologia de restauração. A obra "Mandala da saudade", de Sara Goldman-Belz, é composta por tinta spray (alkyd) e a obra "Três pessoas", de Marina Saleme, por tinta a óleo. Os resultados de análise apresentam um primeiro passo no estabelecimento de um banco de dados de materiais artísticos fabricados no Brasil para fins de restauração e perícia criminal de obras de arte.
Chemical characterization of persistent organic pollutants (POPs) and development of its decomposition in an industrial area of São Paulo, Brazil
2015 - OLIVEIRA, J.P.R.; RIELLA, H.G.; LAINETTI, P.; REDIGOLO, M.M.; AMARAL, P.O.; MOURA, S.C.; BUSTILLOS, J.O.V.
PY-GC-MS applied to the identification of synthetic resins in brazilian painting
2015 - REDIGOLO, MARCELO M.; AMARAL, PRISCILA O.; LEAO, CLAUDIO; CREPALDI, CAIKE; RUSSO, TATIANA; MENDONCA, VALERIA de; MUNITA, CASIMIRO S.; BUSTILLOS, OSCAR V.
Development of method for determination of sodium monochloroacetate and sodium dichloroacetate in cocoamido propyl betaine by gas chromatography: FID, ECD and MS
2015 - LEAO, CLAUDIO; REDIGOLO, MARCELO M.; AMARAL, PRISCILA O.; BUSTILLOS, OSCAR V.
Analysis of neonicotinoids by gas chromatography coupled to nuclide sup(63)Ni - electron capture detector - GC/ECD
2015 - AMARAL, PRISCILA O.; LEAO, CLAUDIO; REDIGOLO, MARCELO M.; CREPALDI, CAIKE; BUSTILLOS, OSCAR V.