ESPERIDIANA AUGUSTA BARRETOS DE MOURA

ESPERIDIANA AUGUSTA BARRETOS DE MOURA

(Fonte: Lattes)

Resumo

Graduated in Chemical Engineering at Faculdade Oswaldo Cruz (1983), Master in Nuclear Technology - Applications at IPEN / USP (1999), Ph.D. in Nuclear Technology - Applications at IPEN / USP (2006) and Post-Doctorate at Center for Advanced Materials ( T-CAM) from Tuskegee University, AL, USA. The main lines of research are: Synthesis of metallic nanoparticles; Obtaining and characterization of nanoparticles from mineral activity and agroindustry residues; Micro and nanofiller functionalization; Synthesis and reduction of graphene oxide; Development and modification of composite materials based on conventional and biodegradable polymers with vegetable fibers, micro and nanofillers of renewable origin; Development of biodegradable, active and intelligent plastic packaging for food, cosmetics, medical and pharmaceutical products; Development of conductive polymeric materials; Development of biomaterials for application in the regeneration of bone and dental tissue. (Text obtained from the Currículo Lattes on October 8th 2021)

Possui graduação em Engenharia Química pela Faculdade Oswaldo Cruz (1983), mestrado em Tecnologia Nuclear ? Aplicações pelo IPEN/USP (1999), doutorado em Tecnologia Nuclear ? Aplicações pelo IPEN/USP (2006) e Pós-Doutorado no Center for Advanced Materials (T-CAM) da Tuskegee University, AL, USA. As principais linhas de pesquisa são: Síntese de nanopartículas metálicas; Obtenção e caracterização de nanopartículas a partir de resíduos da atividade mineral e da agroindústria; Funcionalização de micro e nanocargas; Síntese e redução de óxido de grafeno; Desenvolvimento e modificaçao de materiais compósitos baseados em polímeros convencionais e biodegradáveis com fibras vegetais, micro e nanocargas de origem renovável; Desenvolvimento de embalagens plásticas biodegradáveis, ativas e inteligentes para alimentos, cosméticos, produtos médicos e farmacêuticos;Desenvolvimento de materiais poliméricos condutores; Desenvolvimento de biomateriais para aplicação na regeneração de tecidos ósseos e dentários. (Texto extraído do Currículo Lattes em 08 out. 2021)

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Improvement properties of polypropylene by graphene oxide incorporation
2020 - TATEI, TATIANE Y.; FONTES, ERIC H.; MOREIRA, RENAN P.; DIAS, FRANCISCO V.; OLIVEIRA, RENE R.; RANGARI, VIJAYA; MOURA, ESPERIDIANA A.B.
Due to the remarkable properties of graphene oxide (GO) and its possibility of functionalization,GOhas been used in many applications such as nanocomposites. GO nanosheets have been shown to improve the properties of the polypropylene (PP) matrix, for instance, its strength, gas barrier, thermal, and electrical conductivity. As PP has relatively low cost and varied applications, this work aims to study the changes in its thermal, morphological, and mechanical properties, due to the incorporation of GO in the PP matrix. GO was synthesized from graphite by a modified Hummers method. The nanocomposites PP/GO with 0.1, 0.2, and 0.3 wt% of GO in the PP matrix were obtained using a twin-screw extruder and an injection molding machine via a melt blending process. The nanocomposites PP/GO were characterized by FE-SEM and Izod impact test. In addition, the GO nanosheets were also characterized by Raman spectroscopy, ATR-FTIR, FE-SEM, and XRD, therewith correlation between properties was discussed.
A comparison between graphene oxide and reduced graphene oxide as reinforcement agents in polypropylene nanocomposite using irradiated polypropylene as compatibilizer
2020 - SOARES, CARLOS; SANTANA, JULYANA; GUVEN, OLGUN; MOURA, ESPERIDIANA A.B.
Graphene is thematerial with the bestmechanical resistance ever encountered. Various types of studies have been carried out on possible applications. The use as a reinforcement in nanocomposites has shown to be a promising field, but some studies indicate that the graphene oxide (GO) and reduced graphene oxide (RGO) have better results as reinforcement, due to the functional groups,which allowa better adhesion with the matrix. This study analyzes the production of polypropylene (PP) nanocomposite comparing the use of graphene oxide (GO) and reduced graphene oxide (RGO) as fillers and irradiated polypropylene as a coupling agent.Atwin-screw extruder and injection molding machine were used to produce the nanocomposite PP reinforced with 0.2 wt% of GO and RGO by melt blending. The GO and RGO were characterized byXRDanalysis.The nanocomposite sampleswere characterized by XRD, SEM, TG, DSC and mechanical test.
Production and characterization of a hybrid composite of polypropylene reinforced with piassava (Attalea funifera Martius) fiber and light green clay
2019 - CORREIA, SABRINA A.; CRUZ, PEDRO V.; RODRIGUES, TASSON C.; MONTEIRO, ALEX; DIAZ, FRANCISCO R.V.; MOURA, ESPERIDIANA A.B.
Waste materials have been frequently used as reinforcing materials, to obtain a composite with better properties. Piassava palm is native to the state of Bahia (Brazil) and its fiber, piassava fiber (PF) is awaste material frequently used for industrial and domestic brooms, industrial brushes, carpets, and roofs. The light green clay (LGC) is a natural smectite Brazilian clay from the state of Paraiba. This work aims to produce and evaluate the advantages of this new product achieved by the inclusion of these two natural materials into polypropylene (PP) matrix. A melting extrusion process, using a twin-screw extruder and injection molding machine was used to obtain PP/LGC (97/3 wt%), PP/PF (90/10 wt%) and PP/LGC/PF (87/3/10 wt%) composites. The materials were characterized by mechanical tests, TG, DSC, SEM, and XRD analysis.
Comparative study of the use of rice husk ashes and graphite as fillers in polypropylene matrix composites
2019 - MONTEIRO, ALEX S.; BARREIRA, DAILI A.S.; BARTOLOMEI, SUELLEN S.; OLIVEIRA, RENE R.; MOURA, ESPERIDIANA A.B. de
In recent years, carbonaceous materials have been widely studied for polymer composite applications due to its capability to improve the engineering properties of the polymeric matrix. Among various carbonaceous fillers, carbon nanotube, graphene, and graphite promise to be a suitable reinforcement of polymers. Rice husk ash (RHA), a large residue rich in carbon and silica produced by the burning of rice husk offers also an immense potential as a carbonaceous filler for polymer composites on account of its lowcost, lowdensity, high strength and elastic modulus, no health risks, and renewability. This work aims at studying the effects of RHA and graphite as fillers in polypropylene (PP) matrix composites. The composites PP/RHA and PP/graphite were produced by melting extrusion process. The materials obtained were subjected to mechanical tests, XRD, TG, and FEG-SEM analyses. Comparison studies between neat PP properties and its composites were carried out.
An investigation of mechanical and thermal properties of polypropylene reinforced with different clays
2019 - MONTEIRO, ALEX S.; BARREIRA, DAILI A.S.; SILVA, JAQUELINE S.; OLIVEIRA, RENE R.; VALENZUELA-DIAZ, FRANCISCO R.; MOURA, ESPERIDIANA A.B.
Nowadays, environmental awareness and an increasing concern with the greenhouse effect have increased the interest in composite materials containing at least one of the components from natural origin. Natural clays seem to be a good alternative because they are environmentally acceptable, naturally abundant minerals, and due to their ability to intercalate and exfoliate in the polymer matrix led to an improvement in mechanical, thermal and barrier properties, compared to the neat polymer. This work presents an investigation of the effects of incorporation of two different clays on mechanical and thermal properties of polypropylene (PP) matrix. PP with 1.5–3.0 wt% of the Cloisite® (commercial clay), and light green clay (noncommercial Brazilian clay), was prepared by melt extrusion process. The neat PP and its nanocomposites were characterized by mechanical tests, SEM, DSC, TGA and XRD analyses. In addition, clay characterization by XRD has also been carried out.
Polipropileno reforçado com argila bentonita e fibras de piaçava - processamento e caracterização
2013 - GOMES, MICHELLE G.; MOURA, ESPERIDIANA A.B. de
Preparation and characterization of polypropylene nanocomposites with organoclay and discarded bond
2014 - FERMINO, DANILO M.; VALENZUELA, MARIA das G. da S.; MOURA, ESPERIDIANA A.B.; PARRA, DUCLERC F.; VALENZUELA-DIAZ, FRANCISCO R.
Polypropylene nanocomposites reinforced with organophilic clay and brazilian nut fibers
2014 - ROCHA GOMES, LEILA V. de; FERMINO, DANILO; MOURA, ESPERIDIANA; VALENZUELA, MARIA das G.; VALENZUELA-DIAZ, FRANCISCO
Influence of electrom beam irradiation on PP/Piassava fiber composite prepared by melt extrusion process
2013 - GOMES, MICHELLE G.; FERREIRA, MAIARA S.; OLIVEIRA, RENE R.; SILVA, VALQUIRIA A.; TEIXEIRA, JACIELE G.; MOURA, ESPERIDIANA A.B.
Estudo dos efeitos da radiacao por feixe de eletrons nas propriedades mecanicas da estrutura BOPP/LDPE
2009 - NOGUEIRA, BEATRIZ R.; OLIVEIRA, VITOR M.; ORTIZ, ANGEL V.; MOURA, ESPERIDIANA A.B.