Polymer Composite Materials
Mostrando 1-12 de 77 artigos, teses e dissertações.
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1. Upconversion 3D Printed Composite with Multifunctional Applications for Tissue Engineering and Photodynamic Therapy
Upconversion nanoparticles (UCNPs) are suitable materials for bioapplications due to their ability to emit visible light under near infrared (NIR) excitation, in the biological transparency range. Polycaprolactone(PCL)-based scaffolds are widely used in tissue engineering in combination with inorganic compounds to improve bioactivity and osteoconductive prop
J. Braz. Chem. Soc.. Publicado em: 2020-04
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2. Gold Nanoparticles and [PEDOT-Poly(D,L-Lactic Acid)] Composite: Synthesis, Characterization and Application to H2O2 Sensing
Biocompatible electrochemical devices are challenging to develop due to the toxicity of many advanced electrode materials and the difficulty to degrade the discarded material. Few recent advances were made in the synthesis of conducting biodegradable composites of polymers for electrode materials. In this article we describe the synthesis of two new inorgani
J. Braz. Chem. Soc.. Publicado em: 21/10/2019
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3. Chemical conversion of a solid body of the composite gypsum/polyhydroxybutyrate in hydroxyapatite/polyhydroxybutyrate
Resumo A transformação do gesso em hidroxiapatita permite agregar valor a essa matéria-prima, pois a cerâmica obtida possui alto valor comercial em relação ao gesso, enquanto o polímero acrescenta propriedades de biocompatibilidade e bioatividade ao biocompósito. Assim, compósitos de hidroxiapatita/poli-hidroxibutirato foram preparados a partir do g
Cerâmica. Publicado em: 15/08/2019
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4. Fatigue survival and damage modes of lithium disilicate and resin nanoceramic crowns
Abstract Polymer-based composite materials have been proposed as an alternative for single unit restorations, due to their resilient and shock absorbing behavior, in contrast to the brittleness of ceramic materials that could result in failure by fracture. Objective: To evaluate the fatigue strength and damage modes of monolithic posterior resin nanoceramic
J. Appl. Oral Sci.. Publicado em: 30/05/2019
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5. THE MULTIROLE OF MODIFIED NATURAL GUMS FOR MULTICOMPONENT POLYMERS: AS COUPLING AGENTS FOR POLYMERS REINFORCED WITH CELLULOSIC FIBERS OR COMPATIBILIZERS FOR BIODEGRADABLE POLYMER BLENDS
In this work, the capability to use pine rosin as a biodegradable coupling agent/compatibilizer is studied. To formulate composites, post-consumer polypropylene and discarded agave fibers (as reinforcing agent) are coupled with pine rosin (in pure or maleated form). Besides, poly(lactic acid) (PLA) with poly(butylene adipate-co-terephthalate) (PBAT) are comp
Quím. Nova. Publicado em: 02/05/2019
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6. Composites based on low-density polyethylene combined with PETcoated SBS paperboard shavings
ABSTRACT In this study, polymer composites comprised of shavings of SBS paperboard coated with polyethylene terephthalate (PET) and recycled low-density polyethylene (LDPE) were obtained. The tensile properties, flexural strength, impact resistance and water absorption were determined according to the standards published by the American Society for Testing a
Matéria (Rio J.). Publicado em: 06/12/2018
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7. Análisis comparativo de las propiedades mecánicas de un material compuesto reforzado con fibras de carbono y las de su matriz polimérica de resina epóxica
ABSTRACT In recent years composite materials have been developed for different applications in engineering areas. This paper first presents the tensile properties of a polymer, in this case an epoxy resin, to be used as the matrix of a fiber reinforced composite material. A study of the mechanical properties is presented, which was carried out by performing
Matéria (Rio J.). Publicado em: 19/07/2018
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8. Ballistic Efficiency of Multilayered Armor Systems with Sisal Fiber Polyester Composites
The urban violence and the different types of global armed conflicts demand efficient protective systems against high energy ammunition. Multilayered Armor Systems (MAS) provide efficient protection by making use of lighter and more efficient materials. A typical MAS may be composed of three layers: a front ceramic followed by a composite, backed by a ductil
Mat. Res.. Publicado em: 15/01/2018
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9. Free Vibration Analysis of Functionally Graded Nanocomposite Beams on Elastic Foundation Using a Mesh-Free Method
Abstract The use of Carbon Nanotubes as the reinforcing constituent for polymer matrix composites in place of conventional fibers has led to the emergence of a new generation of advanced composite materials. In this paper, the free vibration of functionally graded nanocomposite beams on elastic foundations are studied. Three different types of Carbon Nanotub
Lat. Am. j. solids struct.. Publicado em: 2017-12
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10. Polypropylene Composites Manufactured from Recycled Carbon Fibers from Aeronautic Materials Waste
Carbon fiber composites are used in several industries such as, aerospace, automotive, civil engineering, sports goods and technical applications due to its low-weight, strength and stiffness. However, the technology of recycling of these thermosetting polymer composites remains an engineering challenge because of their cross-linked structures that impede th
Mat. Res.. Publicado em: 23/10/2017
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11. Dental ceramics: a review of new materials and processing methods
Abstract The evolution of computerized systems for the production of dental restorations associated to the development of novel microstructures for ceramic materials has caused an important change in the clinical workflow for dentists and technicians, as well as in the treatment options offered to patients. New microstructures have also been developed by the
Braz. oral res.. Publicado em: 28/08/2017
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12. Electrical and thermal properties of PLA/CNT composite films
ABSTRACT Conducting polymers presents many potential applications such as biosensors and biofuelcells. However, to be used in those devices, a thin film must be deposited onto a conducting and biocompatible substrate. In this work, carbon nanotubes (CNT) were mixed in a poly (lactic acid) - PLA - matrix with different compositions (from 0.25 to 5.0 %) in ord
Matéria (Rio J.). Publicado em: 10/08/2017