Physical properties evolution in carbon foams as function of synthesizing temperature

Abstract

Carbon foams obtained with Pyroligneous acids from a carbon precursor, such as guadua (angustifolia kunth), were obtained by the blow foaming method at different carbonization temperatures. Physical properties of carbon foams obtained from pyroligneous acids from guadua (angustifolia kunth) were analyzed as a function of the synthesization temperature due to that the carbon foams were obtained by the blow foaming method at different carbonization temperatures. To analyze the temperature’s influence on the crystallographic properties, chemical composition, microstructural characteristics and mechanical properties, the carbon foams were characterized by X-ray diffraction techniques (XRD), energy dispersive X-ray spectroscopy (EDX), and scanning electron microscopy (SEM). The mechanical properties were analyzed by stress-strain tests which are associated with maximum stress. The current work demonstrates the evolution of mechanical properties of the carbon foams, showing greater linear region modulus Es of around 45.8%, Beam module, yield stress (σe) (elastic limit) and fracture stress (σpl) (plastic limit) by the foam obtained at 700 °C. Moreover, the adsorption tests of methylene blue were also performed with the foams which were analyzed with the Uv–vis visible ultraviolet spectroscopy technique. The current work demonstrates the ability of the carbon foams to absorb and filter the methylene blue dissolved in water evidenced by adsorption tests. Taking into account the above, the results of this research opens the possibility of obtaining carbon foams that can be applied in water filters.