A5076245998- Natural Fiber Reinforced Composites
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- biodegradable polymer synthesis and properties
- Concrete and Cement Materials Research
- Advanced Sensor and Energy Harvesting Materials
- Recycling and Waste Management Techniques
- Education Methods and Technologies
- Mathematics Education and Teaching Techniques
- Tailings Management and Properties
- Nanocomposite Films for Food Packaging
- Electrochemical sensors and biosensors
- Metal Extraction and Bioleaching
- Agricultural and Food Sciences
- Academic Research in Diverse Fields
- Recycled Aggregate Concrete Performance
- Microplastics and Plastic Pollution
- Geography and Environmental Studies
- Linguistic Education and Pedagogy
- Concrete Corrosion and Durability
- Photovoltaic Systems and Sustainability
- Extraction and Separation Processes
- Lignin and Wood Chemistry
- Electrodeposition and Electroless Coatings
- Synthesis and properties of polymers
Universidade Luterana do Brasil
2009-2019
Universidade Federal do Rio Grande do Sul
2002-2016
Université Paris Cité
2016
Composites of styrene-butadiene-styrene triblock copolymer (SBS) matrix with curauá fiber and/or a nanoparticulate mineral (montmorillonite clay - MMT) used as reinforcing agents were prepared by melt-mixing. The influence addition on properties like tensile and tear strength, rebound resilience, flex fatigue life, abrasion loss, hardness water absorption composites 5, 10 20 wt% was evaluated in presence maleic anhydride grafted styrene-(ethylene-co-butylene)-styrene (MA-g-SEBS) coupling...
Polyaniline (PAni), an electronic conductive polymer, has poor mechanical properties, such as low tensile, compressive and flexural strength that render PAni a non-ideal material to be processed for practical applications. Desired properties of polyaniline can enhanced by mixing it with polymer good properties. In this work, was synthesised using functionalized sulfonic acids like camphorsulfonic acid (CSA) dodecilbenzene (DBSA) in order promote doping improve its solubility, making possible...
Electric-arc furnace (EAF) dust is considered a hazardous industrial waste. In this work, chemical and mineralogical investigations of EAF from Siderúrgica Rio-Grandense (RS, Brazil) were performed. The elements aluminum, calcium, lead, cadmium, chromium, magnesium, manganese, nickel, potassium, silicon, sodium, tin, iron, zinc, sulphur, oxygen, carbon found in dust. concentration zinc iron showed an average value approximately 20% (weight basis) these are mainly present as ZnO.Fe2O3 (zinc...
The worldwide trend toward using cheap, atoxic and durable materials from renewable resources contributes to sustainable development. Thus, the investigation of potential use vegetal fibers as reinforcing agent in polymeric composites has gained new significance. Sisal fiber emerged a material for polymers used automobile, footwear civil industries. In this work, properties such hardness, tensile strength tear polymer composed by block copolymer styrene-butadiene-styrene (SBS) 5, 10 20%...
This work aimed at the development and characterization of gas sensing devices using thin films polyaniline (PAni) as active layer, deposited by in situ polymerization. The polyaniline, an intrinsically conductive polymer, was used due to its high sensitivity gases, low response time stability, ease synthesis cost. sensor built on a glass fiber reinforced substrate with interdigitated gold electrodes coated PAni film layer whose thickness variation fixed function deposition time. Infrared...
RESUMO Neste trabalho, realizaram-se modificações nos sistemas produtivo e de tratamento efluentes em um complexo industrial automotivo a fim possibilitar utilização do efluente tratado no sistema torres resfriamento. Inicialmente, realizou-se balanço hídrico processos industriais para determinar o consumo água analisou-se qualidade quanto aos parâmetros físico-químicos dois pontos efluentes: decantador secundário (P1) físico-químico na saída da lagoa polimento (P2). Essas análises mostraram...
A carepa de aço é um resíduo sólido gerado na etapa laminação da fabricação do aço, normalmente depositado ao ar livre no pátio siderúrgicas. O presente trabalho visa a avaliar possibilidade incorporação em concretos cimento Portland, como substituição à areia natural quartzosa. Foram produzidos com traços 1:3,5; 1:5,0 e 1:6,5, diferentes teores (0%, 10%, 25% 40%) abatimento 110±10mm, para determinação resistência compressão absorção água. Os exigiram maior quantidade água manutenção...
In view of the great interest in researches on new applications for electronic conducting polymers (ECP), especially polyaniline (PAni) and polypyrrole (PPy), this work aims at study an alternative method metallization conventional (CP). The process consists preparing a composite ECP/CP by direct oxidation monomers using appropriate chemical oxidants followed electrodeposition copper onto composites. were characterized FTIR, Scanning Electron Microscopy Cyclic Voltammetry. A more detailed...
RESUMO A reação álcali-agregado (RAA) é uma das possíveis causas de redução da durabilidade e deterioração estruturas concreto, sendo motivo preocupação à integridade segurança construções em âmbito internacional. Casos confirmados no Brasil, nos últimos anos, afetaram como fundações edificações residenciais, pontes, barragens, entre outras. O processo RAA se desenvolve a partir combinação agentes os álcalis presentes cimento Portland agregados reativos, com presença constante umidade,...
Este trabalho apresenta um estudo da producao e avaliacao de nova materia-prima confeccionada a partir residuos paineis madeira aglomerada provenientes empresas moveleiras regiao do Vale Cai, Rio Grande Sul. Os foram confeccionados utilizando 40 kgf/cm² (3,9 MPa) pressao compactacao, 160 °C temperatura, 12 minutos tempo prensagem e, como adesivo, empregou-se duas resinas base tanino Acacia Negra na proporcao 11 % em relacao massa seca das particulas madeira. As propriedades fisico-mecânicas...
With the advancement of science and technology every day brings new materials with special properties that allow innovation in design solutions. In this light, work aims to address relationship product development use materials. This approach was analyzed by performing a projetual year which proposed methodology Rozenfeld et al used. (2006). Because it is application material, has not yet been fully characterized widespread, necessary investigate characteristics material at beginning...