933 resultados para Polietileno Reaproveitamento


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The present study aimed to analyze how develops the reverse logistics process applied in electrical and electronic products. Such analysis was obtained through literature search and with the completion of a case study, which was developed at the company's Oxil Reverse Manufacture, showing the advantages obtained as well as the difficulties faced in the implementation of the reverse logistics process. The development of this research shows its importance in so far as the residues generated by electronic components, which are one of the most harmful to the environment and harmful to human health, highly possessing heavy metals and non-biodegradable materials in their composition. In this way, the components collected from this activity, should be properly recycled, reused and finally housed in suitable location, these steps that are part of the reverse logistics process

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In this work polystyrene composites reinforced with recycled sisal fibers were processed, in order to apply in the manufacture of printed circuit boards. A thermoplastic matrix of recycled polystyrene was used, this material came from waste expanded polystyrene (EPS) used in appliance's packages. Composites were prepared with 15% and 25% of sisal fibers. To obtain the composites, wasted EPS and natural sisal fibers were chosen, to encourage recycling and reuse of household waste and also the use of renewable resources. The composites were analyzed by standard tensile and flexural test, in order to verify the mechanical properties of the material. The characterization of the composite was done by scanning electron microscopy (SEM) , thermogravimetry (TGA / DTG) , differential scanning calorimetry (DSC) and dielectric analysis . The analysis of the results showed that the percentage of fibers in the composite influences directly the thermal and mechanical properties. Plates with a lower percentage of fibers showed superior properties at a higher percentage. The composite material obtained is easy to process and it's use is feasible for the confection of printed circuit boards, considering it's mechanical, thermal and insulative properties

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The need to use waste from wood processing industry grows due to environmental demands imposed by laws, so like the need to introduce more competitive products in the market (it means better quality and acceptable cost) who must submit by the rational use of raw material, usually turning waste to sub products, what adds higher value for that. To this research, specific case from Ribon Company, located on Camaçari, Bahia-Brazil, has been studied. It is a treated wood producer. Bulk of monthly wood logs there is 70 m3. Its yield is 71,43%, where bulk of generated waste is monthly 20m3. As an exploitation way from generated waste, it has been suggested some options like: erosion protection to specific areas, a wildlife shelter as an henhouse etc, recreational articles, coal, linings, treadmills. However this research will give focus to the furniture design made of waste. As a conclusion, there is very much need to assign new utilizations to that sub used materials, since there is significant amount to increase companyâs productive yield

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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The waste, exaggerated and incorrect disposal of biomass are common practices in modern times where everything is disposable. However the growing concern with the nature and the environment compel man to give nobler destinations for these products through sustainability and recycling of waste. Banana peel is a residual biomass, which is not consumed. It generates tons of waste per week in São Paulo city. This trash is disposed in dumps and landfills, which could be reduced by using it as reinforcement in natural composites. The high density polyethylene (HDPE) is a polymer derived from the ethylene polymerization and is easily recycled. Which makes it a sustainable material. In the present work characteristics of the natural composite composed with banana peel and high-density polyethylene were studied. It was noted that removing the lignin present in the banana peel, the fiber introduces a significant improvement in thermal resistance. The preparation of composite was made with a ratio of 5% and 10% of reinforcement in comparison with polymeric matrix mass. Composites were thermally, mechanically and microscopically characterized. The addition of fiber in the polymer increased the mechanical strength of the composite. The fiber surface treatment with distilled water removed the amorphous material present in the fibers, improving significantly thermal stability and increasing crystallinity of the celullose. The addition of 5% fiber in mass to the polymer increased significantly the tensile strength and elasticity modulus for the composite. With 10% of fiber addiction there were also an improvement when compared with pure HDPE, but when compared with 5% composite the mechanical properties are slightly lower. This may be due to the fiber particle size, which are small and eventually become a hub of tension ... (Complete abstract click electronic access below)

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Pós-graduação em Engenharia Mecânica - FEG

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Pós-graduação em Ciência Odontólogica - FOA

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Engenharia Civil - FEIS

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Pós-graduação em Agronomia (Ciência do Solo) - FCAV

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Ciência Odontólogica - FOA

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Pós-graduação em Ciência Odontólogica - FOA

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O Projeto de Extensão foi desenvolvido na Farmácia-Escola Prof. Dr. Antônio Alonso Martinez, que faz parte do NAC (Núcleo de Atendimento à Comunidade), pertencente à Faculdade de Ciências Farmacêuticas da UNESP. Desenvolveu-se um Sistema de Gestão Interno para o controle das amostras grátis e medicamentos que são destinados à doação para a população de Araraquara e região. Realizou-se a orientação e conscientização da população sobre o reaproveitamento de medicamentos e amostras grátis que não seriam mais utilizados e que estavam dentro do prazo de validade. A divulgação foi efetuada com folder explicativo que foi distribuído na Farmácia-Escola, em consultórios médicos e nas faculdades da UNESP do Câmpus de Araraquara. Além disso, houve divulgação na Semana de Atenção Farmacêutica Estudantil (SAFE) e no site e jornal da EPTV. O prazo de validade de cada produto foi verificado e a dispensação desses medicamentos foi feita mediante a apresentação de prescrição médica. Além disso, realizou-se a Assistência Farmacêutica ao informar ao paciente os detalhes da posologia e possíveis interações medicamentosas, de modo a esclarecer eventuais dúvidas dos pacientes. Os medicamentos mais doados foram anti-hipertensivos e hormônios, refletindo no maior número de formas farmacêuticas doadas como sendo comprimidos e cápsulas. O objetivo da divulgação foi alcançado com o aumento de doações realizadas nos meses subsequentes ao início da mesma e com o aumento de 61,9 % em relação ao ano de 2012