Autor(a/res): Saulo Rocha Ferreira, Andréa Maria da Silva, Fernando Gomes de Souza Jr, Romildo Dias Toledo Filho e Flávio de Andrade Silva.

Resumo: The work at hand presents an experimental investigation on the chemical and mechanical behavior of coir fibers treated with aniline polymerization (PAni), H2O2 and as-received. The fibers were characterized using Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetry analysis and scanning electron microscopy. The obtained data shows that the presence of H2O2 produces some extension of oxidation of the hydroxyl groups. After the formation of PAni new characteristic bands are formed. Additionally, the electrical resistivities and respective sensitivities to variations of the applied pressure were evaluated. Finally, a state-of-the-art micromechanical testing machine was used to study the tensile behavior of treated and as-received fibers. The cross-sectional area of the fiber was measured using scanning electron microscope micrographs and image analysis. The failure mechanisms are described and discussed in terms of the fiber microstructure.

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