INVESTIGADORES
VILLAR Marcelo Armando
artículos
Título:
Agro-industrial residue from starch extraction of Pachyrhizus ahipa as filler of thermoplastic corn starch films
Autor/es:
O.V. LÓPEZ; F. VERSINO; M.A. VILLAR; M.A. GARCÍA
Revista:
CARBOHYDRATE POLYMERS
Editorial:
ELSEVIER SCI LTD
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 124 p. 324 - 332
ISSN:
0144-8617
Resumen:
Biocomposites films based on thermoplastic corn starch (TPS) containing 0.5% w/w fibrous residue fromPachyrhizus ahipa starch extraction (PASR) were obtained by melt-mixing and compression molding. PASR is mainly constituted by remaining cell walls and natural fibers, revealed by Scanning Electron Microscopy (SEM). Chemical composition of the residue indicated that fiber and starch were the principal components. Biocomposites thermo-stability was determined by Thermo-gravimetric Analysis. A continuous PASR-TPS interface was observed by SEM, as a result of a good adhesion of the fibrous residue to starch matrix. Likewise, films containing PASR presented fewer superficial cracks than TPS ones, whereas their fracture surfaces were more irregular. Besides, the presence of PASR increased starch films roughness, due to fibers agglomerates. Films reinforced with PASR showed significantly lower water vapor permeability (WVP). In addition, PARS filler increased maximum tensile strength and Young?s modulus of TPS films, thus leading to more resistant starch matrixes.
