ESPERIDIANA AUGUSTA BARRETOS DE MOURA

(Fonte: Lattes)
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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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2018 - 20204
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Tem arquivos: true × Autor: DANAE LOPES FRANCISCO ×

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Agora exibindo 1 - 4 de 4
  • Imagem de Miniatura
    Artigo IPEN-doc 27595
    Noncovalently functionalized halloysite nanotubes for use in reinforced polymer composites
    2020 - FRANCISCO, DANAE L.; PAIVA, LUCILENE B.; ALDEIA, WAGNER; LUGAO, ADEMAR B.; MOURA, ESPERIDIANA A.B.
    The inorganic halloysite nanotube (HNT) is a promising type of naturally occurring fillers with many important uses in different fields. An HNT has a relatively low content of hydroxyl groups on its surface, which makes it relatively hydrophobic, although this is not always sufficient to guarantee good interfacial adhesion in composite systems. Further surface treatment is required to improve the compatibility of HNTs with polymer matrixes, maximizing interfacial interactions. The aim of the present work was to study a noncovalent functionalization of halloysite with 2,2′-(1,2-ethenediyldi-4,1-phenylene) bisbenzoxazole (EPB), based on electron transfer, for further use of EPB as a coupling agent in polymer/HNT compatibility. A set of characterization techniques were performed to evaluate the chemical and physical properties and evidence the functionalization. The results revealed the surface modification of halloysite upon functionalization. Emphasis was for powder wettability by tensiometry based on Washburn because no studies about halloysite powders using this technique could be found in the literature. The results demonstrate a reduction in the total surface energy of the system, usually accompanied by a reduction in the polar component upon HNT modification.
  • Imagem de Miniatura
    Capítulo IPEN-doc 25629
    Investigation on mechanical behaviors of polyamide 11 reinforced with halloysite nanotubes
    2019 - FRANCISCO, DANAE L.; PAIVA, LUCILENE B. de; ALDEIA, WAGNER; LUGAO, ADEMAR B.; MOURA, ESPERIDIANA A.B.
    The inorganic halloysite nanotubes (HNTs) are a promising type of natural occurring filler for polymers. Its characteristics such as high aspect ratio (10–50), small size, and high strength (elastic modulus—140 GPa) suggest that HNTs have a potential use in high-performance polymer nanocomposites. Compared to other nanoclays and nanosilica, the relatively low content of hydroxyl groups on their surfaces makes HNTs relatively hydrophobic, although, sometimes, this is not sufficient for guaranty a good interfacial adhesion in composite systems. In the present study, halloysite nanotubes were incorporated in a polyamide 11 (PA11) matrix by melt extrusion, using a twin-screw extruder and injection molding machine. The neat PA11 and PA11/HNT nanocomposites were characterized by mechanical tests (tensile, flexural and impact tests), and the correlation between properties were discussed.
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    Artigo IPEN-doc 25303
    Caracterização de nanotubos de haloisita funcionalizados covalentemente para aplicação em compósitos de matriz polimérica
    2018 - FRANCISCO, D.L.; SILVA, F.A.; PAIVA, L.B.; ALDEIA, W.; LUGAO, A.B.; MOURA, E.
    A haloisita (HNT) possui interessantes características suscitando seu interesse como candidata à produção de nanocompósitos poliméricos de alto desempenho. O teor relativamente baixo de grupos hidroxílicos em sua superfície a torna relativamente hidrofóbica, embora, às vezes, isso não seja suficiente para garantir uma boa adesão interfacial com a matriz polimérica. Sendo então, necessário um tratamento hidrofóbico adicional para favorecer a compatibilidade com a matriz. No presente estudo, um tratamento hidrofóbico da HNT foi avaliado a partir de soluções hidrolisadas de 3-(trimetoxisilil)propil metacrilato (MAPTS) em meio alcoólico. A HNT modificada foi caracterizada através da análise de área superficial específica, análise termogravimétrica e ensaio de extração em solução de água/tolueno. Os resultados mostraram uma redução na área superficial, um aumento na perda de massa final no ensaio termográvimetrico e um deslocamento da HNT modificada para o tolueno, evidenciando a funcionalização da HNT com o MAPTS.
  • Imagem de Miniatura
    Capítulo IPEN-doc 24662
    Characterization of non-covalently functionalized halloysite
    2018 - FRANCISCO, DANAE L.; PAIVA, LUCILENE B. de; ALDEIA, WAGNER; LUGAO, ADEMAR B.; MOURA, ESPERIDIANA A.B.
    The inorganic nanotube halloysite (HNT) is a promising type of natural occurring filler for polymers. Its characteristics, such as high aspect ratio (10–50), small size, and high strength (elastic modulus—140 GPa) suggest that HNTs have a potential use in high-performance polymer nanocomposites. Compared to other nanoclays and nanosilica the relatively low content of hydroxyl groups on their surfaces makes HNTs relatively hydrophobic, although, sometimes, this is not sufficient for guaranty a good interfacial adhesion in composite systems. Further hydrophobic treatment is required to improve HNTs compatibility with polymer matrixes, maximizing interfacial interactions. In the present study, different percentages of EPB (2,2-(1,2-ethene diyldi-4,1-phenylene) bisbenzoxazole) was used to perform a non-covalent functionalization of halloysite, based on electron transfer interactions. The functionalization is characterized by specific surface area (BET), thermogravimetric analysis (TG) and water/toluene extraction experiment.