Metal coating films were deposited on the surface of the pieces of non-conducting polymers, acrylonitrile butadiene styrene (ABS), high impact polystyrene (HIPS) and poly (lactic acid) (PLA). These three polymers have been used since they are the main raw materials available for fusion and deposition molding equipment. In order to achieve surface metallization by electrodeposition, it was necessary to apply a pre-treatment using the chemical polymerization technique in solution with the electroconductive polymer polypyrrole (PPy) was deposited on the specimens. A uniform layer of PPy was deposited on the surface of the specimens of the ABS and HIPS polymers, while in the specimen of the polymer PLA this layer showed uniformity faults. After this pretreatment was possible to perform copper electrodeposition, creating the metallic coatings on the ABS / PPy, HIPS / PPy and PLA / PPy surfaces. This metallic coating was uniform in all specimens except the one of the PLA polymer that was not sanded. The adhesion of the coating was evaluated by the adhesion test with tape and the quality of the appearance (absence of visual defects), the morphology, the uniformity, the thickness, the conductivity and the adhesion quality of the films were analyzed.
A promoção de uma forte interação entre fibras vegetais e matrizes poliméricas, promete a formação de materiais de mais elevado desempenho mecânico. A busca por materiais com melhores propriedades oferece a sociedade produtiva a oportunidade de substituir os materiais convencionais por compósitos mais sustentáveis e amigável e ecologicamente mais corretos. Entretanto, as naturezas químicas das fibras vegetais e dos polímeros precisam se aproximar de forma a promover uma maior interação eletrostática e ou de ancoragem mecânica. Neste trabalho, a fibra de coco foi modificada de forma a promover a nucleação e o crescimento de cristais incrustados na superfície da fibra. Esta condição altera a morfologia e a condição química da fibra, podendo promover melhores interações com matrizes poliméricas. As fibras ficaram em contato com soluções pozolâmicas á temperatura e condições ambientais por intervalos diferentes de tempo. As imagens revelaram uma considerável população de cristais nas fibras que foram submetidas nestas condições.
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