Preparação de cabelo caucasiano como material carbonoso

Abstract

This work presents the steps preparation of the Caucasian hair, for later carbonization and its transformation as carbonaceous material, aiming the production of a carbonaceous material activated from a raw material coming from residues. Some of the steps are the conversion of hair into felt and the subsequent oxidation which aims to eliminate the cortex and promote crosslinking between the protein chains. This process allows the hair to be transformed into a thermoset, as well as to promote evaporation of the hair cortex, leaving the hollow filament. As a sequential step, carbonization and activation of the obtained material was carried out. Such conditions indicate that Caucasian hair can become an activated carbon fiber of high surface area and high adsorption capacity, desirable characteristics for a future application as molecular sieve.

Process of converting human hair into hollow carbon filament for electrochemical capacitor

“…Figures 4a and 4b show the micrographs of the felt filaments, CNC and CCC respectively. By comparing them with Figures 3a and 3b there is a notable absence of the cortex inside the filament, a predicted consequence, since the oxidation process volatilizes some structures, making the hollow filament tube-like [8,9,19]. Pramanick et al, in similar work, used human hair for the manufacture of sensors and obtained a hollow filament after carbonization or pyrolysis.…”

“…Pramanick et al, in similar work, used human hair for the manufacture of sensors and obtained a hollow filament after carbonization or pyrolysis. They also associate this fact with the loss of the cortex, leaving only the cuticular structure (rich in fixed carbon) [8,20]. It is possible to observe that the CCC felt filament obtained a different rougher, when compared to CNC, suggesting a different pore size/type distribution and possibly a more porous surface for each sample, an important characteristic for the use of carbon materials in energy storage devices.…”

“…The main difference in each region is the type of protein present in each region [4,6,7]. The interior content of the capillary fiber, constituted by the cortex and sometimes by a medulla, has a structure susceptible to volatility when subjected to high temperatures (> 200 ° C) [8,9]. Therefore, the residue generated in beauty salons and barbershops is heterogeneous.…”