| dc.description.abstract | Microstructured and moldable materials were designed, obtained and
characterized as composites from by-products of Cocus nucifera L. and Agave
angustifolia Haw. Powders and leached sustances with crosslinking agents of
coconut endocarp (EC) were achieved by combined thermal and mechanical
processes, reaching grain sizes less than 290 micrometers. Carbonaceous agave
fibers (ACF) were obtained from the waste of the process of making pasta and agave
flour for food, established by Altamirano (2007), incinerating them in a controlled way
from 200 to 350 ° C. Powders and leached sustances of EC and ACF were
characterized with different techniques in order to evaluate the chemical composition,
morphological and microstructural properties inherent to the resulting products so
that selecting combinations capable to produce desirable qualities of rigidity with wide
margin of tolerance before breaking, typical of the starting materials. The presence of
n-aminopyrroldine and other radicals in leachates acted as a precursor to repolymerization
process of the EC, powering its effect with the addition of diluted fatty
functional groups in solvents with mid molecular weight. For the molding of
composites, a compression process and sintering were reconfigured to achieve a
coalescence of medium pressure (≤ 60 KN) and low temperature (<300 ° C). The
further characterization of the samples with the used techniques for base products
showed that the reshaped of initial structure of the components of CD and ACF was
effective, as both, IR and Raman spectra detected characteristic vibrational modes
of C-C, C = C and CO bonds in the same positions and similar intensities. The
microstructural analysis with X- Ray showed the presence of two well-defined
crystalline phases, of whewellite and K2FeO4, as well as signals for C70. | |
