The production of polymer nanocomposites with natural clays as reinforcement has been thoroughly researched by many researchers.The authors always have seeking better properties compared to the neat without reinforcement.That is great appeal these types materials.The most commonly used in are montmorillonite (MMT), halloysite, and kaolinite.Thus, organic modification also studied improve clay interlayer space (intercalation), due creation an affinity matrix reaching than polymer.In this...

Natural fibres have many advantages over synthetic ones, making them attractive for reinforcing polymer materials. This work evaluates the use of an Amazonian plant, namely Curauá (Ananas erectifolius), as a reinforcement phase biocomposites fabricated by cold pressing. been shown to be promising fibre composite materials, especially due their higher elastic modulus than other plant species. An L9 Taguchi design is used investigate effect fraction, NaOH concentration and immersion time on...

Metallic nanoparticles with virucidal properties dispersed in a polymeric matrix have gained prominence the scientific community as rapid and effective alternative that employs additive manufacturing (AM) or 3D printing method. This study aims to produce filaments for using polymer nanocomposites based on polylactic acid (PLA) copper (CuNPs) different proportions. The activity of various proportions PLA was investigated. composites were produced following mixture design (DOE) concentrations...

O objetivo do trabalho foi fazer um estudo através Ensaio de Flexão em 3 pontos painéis sanduiches utilizando faces material compósito com fibras Juta submetidas a tratamento alcalino matriz resina epóxi comparando fases feitas sem reforço fibras. Foi estudado também o comportamento diferentes materiais no núcleo estrutura Honeycomb ABS, PETG e PLA obtidos por impressora 3D, possibilitando avaliar tipo sanduíche mais viável dependendo da aplicação requerida dados comparativos ensaios...

Sandwich panels are widely used in the naval and aerospace industries to withstand normal tensile, compressive, shear stresses associated with bending. The faces of sandwich composites usually made metals such as aluminum and, some studies composites, using a polymeric matrix, but there no literature castor oil polyurethane matrix. core panel must keep apart be rigid perpendicular them. To begin work, study was carried out on influence alkaline treatment sisal fibers increase fibers’...

The aim of this work was to study the stability and morphological properties polystyrene latex containing kaolinite as a filler during process synthesis nanocomposites viaemulsion polymerization. Nanocomposites with 1, 3, 5 wt% were prepared. Latexes 1 3 stable polymerization reaction. Hydrodynamic diameters 93.68 82.11 nm found for latexes kaolinite, respectively. quantities added reaction did not influence conversion curves or number particles. X-ray diffraction (XRD) unconventional...

The application of lignocellulosic fibers as reinforcements in composite materials has found increasing use recent years, due to the attractive characteristics natural such their low cost, high specific modulus, biodegradability, abundance and with many technical qualities. Natural fiber hybrid composites are very frequently used automotive aerospace other industries. In this work, numerical experimental analysis is carried out compare curauá, jute sisal epoxy for industry. most appropriate...

Composites with natural lignocellulosic fillers are being cited as a viable and sustainable alternative to conventional materials, they combine lower costs weight. In many tropical countries, such Brazil, there is considerable amount of waste that improperly discarded, which causes pollution the environment. The Amazon region has huge deposits clay silicate materials in Negro River basin, kaolin, can be used polymeric composite materials. This work investigates new material (ETK) made epoxy...

The properties of aluminum alloys can be improved by the processing conditions that cause changes in microstructure and addition alloy elements. In order to understand physical behavior mechanical alloys, it is important aware some microstructural characteristics. Some these characteristics are morphology, elements, volume size, second phase. this study, we analyzed effect annealing on laminated AA 5182 alloy, when subjected different conditions. was heated temperatures 50º C, 100º 150º 200º...

This study evaluated the influence of cellulose nanocrystals (CNC) content on properties epoxy nanocomposites. The CNC were obtained from microcrystalline by acid hydrolysis. 4.0, 5.5 and 7.0% untreated incorporated into resin. Sonication was used to disperse in thermal stability, glass transition temperature degree conversion reduced as observed Thermogravimetry Differential Scanning Calorimetry, respectively. tensile bending modulus showed no significant improvement impact resistance a...

The natural fiber market has been growing extraordinarily. Hereupon the current work presents of periquiteira tree Cochlospermum orinocense Amazon forest. chemical composition, physical aspects, morphology, thermal and mechanical properties this will be discussed. stability samples was about 200 °C. decomposition cellulose hemicelluloses in fibers occurred at 300 ºC above, while degradation happened above 400 This had good specific strength binding due to their low weight presence high...

Solid residues from agroindustry often accumulate and cause environmental imbalance. An alternative to this is use residue as a reinforcement in polymers. The achievement of work was characterize composite with polystyrene matrix reinforced Brazil nut shells residues. were cleaned ground then produce the samples via injection molding proportions 0%, 2.5% 5% load. specimens characterized using mechanical tensile testing thermogravimetric analysis (TGA). test showed that filler had greater...

The present work aims at the preliminary evaluation of Paspalun repens macrophyte dry biomass adsorbent material zinc (Zn) and copper (Cu) metals from water. diversity Species is due to extensive aquatic environment where it inserted. species comes Buiuçu lake located in region Parintins-Amazonas- Brazil. was dried a mill then digestion through microwaves done before after its exposure solutions containing different concentrations (1.00, 1.50, 2.00, 3.00 mg mL-1 metals) for period 48 hours....

This work investigates chemically modified Mallow fibers (MF) and their utilization as reinforcement in an epoxy composite.The untreated (UTMF) the treated (TMF) with 5% NaOH solution were characterized, Mallow/epoxy resin composites (MEC) fabricated using 10, 20, 30 wt.% of TMF, mechanical, thermal properties studied.UTMF, MEC evaluated Fourier-transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC)-Thermogravimetric Analysis (TGA), X-ray diffraction (XRD), scanning...

With the collapse of COVID-19 pandemic, it was necessary to explore new materials with resistance SARS- CoV-2 lower cost and effective easy production methods, such as 3D printing. The objective produce characterize filaments for printing using PETG copper nanoparticles (NCu) aiming at obtaining a virucidal surface. Nanocomposites were made addition 0.75% 1% NCu pure PETG. After printing, mechanical tests nanoindentation, thermogravimetric analyses (TGA), digital optical microscopies Fourier...

Welding is a manufacturing process that aims to create permanent joint between two components using parameters such as heat, pressure, or energy. It currently one of the most widely used processes in industry and there are no concerns about safety products produced. gases responsible for protection weld pool stability electric arc, which directly affects quality final properties weld. The aim this study was evaluate current conditions welding large company Manaus Industrial Pole (PIM),...

Entre os tratamentos de aneurisma, o tratamento endovascular da aorta abdominal com stents é a alternativa mais aplicada atualmente. O objetivo deste estudo determinar um algoritmo matemático que permita definir uma equação para predeterminar comprimento final depois liberado do cateter stent no implante ou três (triplo stent). Para estabelecer matemática, foi utilizado nitinol Lumini®, fabricado pela empresa Braile® Biomédica (Brasil), tipo autoexpansível inserido num tubo diâmetro...

This study investigates the impact of graphene synthesis techniques, such as chemical exfoliation, Chemical Vapor Deposition (CVD) and Liquid Phase Exfoliation (LPE) on electrical conductivity. The objective is to understand how variations in methods influence morphology and, consequently, its characteristics. Description techniques are explored detail identify each process affects structure performance graphene. results indicate that exfoliation introduces more damage structure, generally...