Leonardo Gondim de Andrade e Silva
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View article: EB Radiation Processing of HDPE/Rice Husk Ash Composites
EB Radiation Processing of HDPE/Rice Husk Ash Composites Open
High-density polyethylene (HDPE) is a valuable material, but its application under certain operational conditions is limited by oxidation resistance. To mitigate this, rice husk ash (RHA), a silica-rich (~95%) byproduct, was incorporated a…
View article: Effects of Ionizing Radiation on the Physicochemical Properties of Polyester Multifilaments
Effects of Ionizing Radiation on the Physicochemical Properties of Polyester Multifilaments Open
Polyethylene Terephthalate (PET), known nationally as Polyester (PES), is the most used fiber in the textile sector and stands out compared to natural fibers and other synthetic fibers due to its constant rise in production and consumption…
View article: Evaluation of graphene incorporation for mechanical properties of polypropylene composites
Evaluation of graphene incorporation for mechanical properties of polypropylene composites Open
Graphene nanoparticles (GnP) were selected as an alternative reinforcing nanofillers, which enhances the mechanical properties of polypropylene (PP-homo and PP-block copolymer). It may play the role of compatibilizer in polypropylene-graft…
View article: Graphene Oxide: A Comparison of Reduction Methods
Graphene Oxide: A Comparison of Reduction Methods Open
This paper presents a comparison of traditional thermal and chemical reduction methods with more recent ionizing radiation reduction via gamma rays and electron beams (e-beams). For GO, all synthesis protocols were adapted to increase prod…
View article: Characterization of Hydrogels Containing Mandelic Acid Nanoemulsions and Different Essential Oils
Characterization of Hydrogels Containing Mandelic Acid Nanoemulsions and Different Essential Oils Open
Hydrogels are polymeric matrices having minimal toxicity, elastomeric consistency and high permeability, making them useful for the controlled release of actives. These products have extensive applications in the cosmetic area as drug vehi…
View article: Thermal degradation and spectroscopy characterizations of TPS/PBAT blends irradiated by Cobalt-60 source
Thermal degradation and spectroscopy characterizations of TPS/PBAT blends irradiated by Cobalt-60 source Open
This study aimed to prepare blends of natural polymers of TPS with PBAT by reactive extrusion with irradiation process, using the plasticizers (castor oil and glycerol) to evaluate the thermal and chemical properties. The blends were submi…
View article: ANÁLISE SENSORIAL: SUA RELEVÂNCIA NO DESENVOLVIMENTO DE UM COSMÉTICO
ANÁLISE SENSORIAL: SUA RELEVÂNCIA NO DESENVOLVIMENTO DE UM COSMÉTICO Open
também uma amostra de escarro de paciente com PCM.Foi determinado nível de gp43 em amostras de urinas de pacientes com PCM por ensaio imunoenzimático de inibição (inhELISA) utilizando mAbgp43.O dotblotting demonstrou reatividade intensa de…
View article: Creep analysis of a GRP cylinder under hydrostatic test / Análise de fluência de um cilindro GRP sob teste hidrostático
Creep analysis of a GRP cylinder under hydrostatic test / Análise de fluência de um cilindro GRP sob teste hidrostático Open
The GRP (Glass Reinforced Polymer) has been widely used in several industrial applications mainly due to its low cost, high availability, and easy manufacturing process. The matrix made by a combination of glass fibers and epoxy offers goo…
View article: Influence of electron beam irradiation on the mechanical properties of pbat/pla polymeric blend / Influência da irradiação por feixe de electrões nas propriedades mecânicas da mistura polimérica pbat/pla
Influence of electron beam irradiation on the mechanical properties of pbat/pla polymeric blend / Influência da irradiação por feixe de electrões nas propriedades mecânicas da mistura polimérica pbat/pla Open
The aim of this research was to evaluate the changes in the mechanical properties of poly(butylene adipate co-terephthalate)/poly(lactic acid) (PBAT/PLA) polymeric blend after the radiation process at different radiation doses. The irradia…
View article: Influence of electron beam irradiation on the mechanical properties of PBAT/PLA polymeric blend / Influência da irradiação do feixe de elétron nas propriedades mecânicas da mistura polimérica PBAT/PLA
Influence of electron beam irradiation on the mechanical properties of PBAT/PLA polymeric blend / Influência da irradiação do feixe de elétron nas propriedades mecânicas da mistura polimérica PBAT/PLA Open
The aim of this research was to evaluate the changes in the mechanical properties of poly(butylene adipate co-terephthalate)/poly(lactic acid) (PBAT/PLA) polymeric blend after the radiation process at different radiation doses. The irradia…
View article: AuCu/TiO2 Catalysts prepared using electron beam irradiation for the preferential oxidation of carbon monoxide in hydrogen-rich mixtures
AuCu/TiO2 Catalysts prepared using electron beam irradiation for the preferential oxidation of carbon monoxide in hydrogen-rich mixtures Open
The major part of the world production of hydrogen (H2) is originated from a combination of methane steam reforming and water-gas shift reaction resulting in an H2-rich mixture known as reformate gas, which contains about 1% vol (10,000 pp…
View article: Characterization using X-ray diffraction and study of the crystallinity of the thermoplastic starch/poly(butylene adipate-co-terephthalate) blends irradiated by gamma rays
Characterization using X-ray diffraction and study of the crystallinity of the thermoplastic starch/poly(butylene adipate-co-terephthalate) blends irradiated by gamma rays Open
View article: Effects of Gamma Radiation on the Properties of the Thermoplastic Starch/Poly (Butylene Adipate-co-Terephthalate) Blends
Effects of Gamma Radiation on the Properties of the Thermoplastic Starch/Poly (Butylene Adipate-co-Terephthalate) Blends Open
The development of blends made from matrices of synthetic biodegradable polymers, and natural additives, are considered less environmentally aggressive materials. This work aimed to study the effects of gamma radiation on the properties of…
View article: Effects of Gamma Radiation on the Properties of the Thermoplastic Starch/Poly (Butylene Adipate-co-Terephthalate) Blends
Effects of Gamma Radiation on the Properties of the Thermoplastic Starch/Poly (Butylene Adipate-co-Terephthalate) Blends Open
The development of blends made from matrices of synthetic biodegradable polymers, and natural additives, are considered less environmentally aggressive materials. This work aimed to study the effects of gamma radiation on the properties of…
View article: Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure
Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure Open
Individual carbon nanotubes (CNTs) exhibit excellent mechanical, electrical and thermal properties, leading to development of a new generation of advanced lightweight materials and spacecraft electronics substituting the electronics based …
View article: Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure
Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure Open
Submitted by Marco Antonio Oliveira da Silva ([email protected]) on 2017-10-09T17:58:49Z No. of bitstreams: 1 23164.pdf: 1620581 bytes, checksum: abbd9bb566b49a949b3f0142f6db1544 (MD5)
View article: Silver and Titanium Nanoparticles Used as Coating on Polyurethane Catheters
Silver and Titanium Nanoparticles Used as Coating on Polyurethane Catheters Open
Silver nanoparticles have been used in the medical area due to their remarkable antimicrobial properties. In this sense titanium dioxide nanoparticles obtained by the sol-gel method were used as coating of catheters for subsequent impregna…
View article: Thermoanalytical study of polyurethane, subjected to ionizing radiation, as raw material for catheters for clinical practice
Thermoanalytical study of polyurethane, subjected to ionizing radiation, as raw material for catheters for clinical practice Open
Submitted by Marco Antonio Oliveira da Silva ([email protected]) on 2017-06-06T17:56:15Z
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View article: Behavior of adhesion forces of the aqueous-based polychloroprene adhesive magnetically conditioned
Behavior of adhesion forces of the aqueous-based polychloroprene adhesive magnetically conditioned Open
This research is an innovation proposal for magnetic conditioning of the aqueous-based polychloroprene contact adhesive with the purpose of increasing the adherence capacity between the adhesive and the substrate. Today, the aqueous-based …
View article: Use of Pseudoboehmite Nanoparticles for Drug Delivery System of Glucantime®
Use of Pseudoboehmite Nanoparticles for Drug Delivery System of Glucantime® Open
Recently, the incidence of American Cutaneous Leishmaniasis (ACL) has been grown in Latin America, especially in Brazil, where from 1980 to 2005, 605,062 cases were recorded. The drug glucantime®, whose active principle is the meglumine an…