Abstract
Highly environmentally-friendly fibreboards were manufactured by hot-press moulding using Posidonia ocaeanica wastes and a partially biobased epoxy resin as binder. Fibreboards with a constant fibre content of 70 wt % were successfully manufactured by thermo-compression. The effects of a conventional alkali treatment were compared to the synergistic effects that additional silanization with two silanes (amino and glycidyl) can exert on the mechanical and thermo-mechanical properties of fibreboards. The results revealed a remarkable improvement of the mechanical properties with the combination of the alkali treatment followed by the silanization. Scanning electron microscopy also revealed increased resin-fibre interactions due to the synergistic effect of both amino- and glycidyl-silanes. These fibreboards represent a formaldehyde-free solution and can positively contribute to sustainable development as the lignocellulosic component is a waste and the binder resin is partially biobased.
Highlights
Nowadays most developed countries are paying special attention to environmental issues.Some of the most important actions to protect the environment are focused on the optimum use of natural resources, the reduction of polluting gas emissions, upgrading industrial and/or agroforestry wastes, etc.; all this with the main aim of reducing the carbon footprint and positively contributing to sustainable development based on a circular economy concept
Posidonia oceanica (PO) fibres are randomly dispersed in the biobased epoxy matrix, leading to quasi-isotropic behaviour
Of the fractured surface of fibreboards with PO fibres subjected to different chemical treatments, (a,b) untreated; (c,d) NaOH; (e,f) NaOH + APTMS and (g,h) NaOH + GLYMO
Summary
Nowadays most developed countries are paying special attention to environmental issues.Some of the most important actions to protect the environment are focused on the optimum use of natural resources, the reduction of polluting gas emissions, upgrading industrial and/or agroforestry wastes, etc.; all this with the main aim of reducing the carbon footprint and positively contributing to sustainable development based on a circular economy concept. Nowadays most developed countries are paying special attention to environmental issues. Petroleum depletion is acting as the leading force to the development of a new series of environmentally-friendly materials from renewable resources. This environmental sensitivity is marked in the polymer and polymer-composite industries, which, traditionally, are highly dependent on petroleum-derived polymers and resins. With regard to thermosetting resins, petroleum-derived epoxies, unsaturated polyesters, vinyl esters, phenolics, acrylics, etc., still represent the main source of industrial resins for uses in the composites industry and for the manufacturing of fibre and particle boards
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