CIDCA   05380
CENTRO DE INVESTIGACION Y DESARROLLO EN CRIOTECNOLOGIA DE ALIMENTOS
Unidad Ejecutora - UE
artículos
Título:
Cassava (Manihot esculenta) starch films reinforced with naturalfibrous filler
Autor/es:
VERSINO, F.; GARCIA, M.A.
Revista:
Industrial Crops and Products
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 58 p. 305 - 314
ISSN:
0926-6690
Resumen:
tThe remaining fibrous residue of cassava starch extraction was characterized and used as film fillerin order to obtain an enhanced fully biodegradable starch-based composite. Film-forming gelatinizedcassava starch suspensions increased significantly their apparent viscosity and storage modulus withfiller addition, although no segregation of filler particles was observed. Homogenous films were obtainedfrom 3% w/w cassava starch film-forming suspensions including glycerol as plasticizer and the remainingfibrous residue. Plasticizer concentration was optimized in reinforced starch films. SEM micrographs evi-denced that the filler was structurally incorporated in the matrix, although concentrations of 3% ledto more heterogeneous surfaces because of the presence of large size filler particles. Reinforced filmsexhibited UV-barrier capacity and adequate water vapor barrier properties (14.6 ± 0.7 10−11g/m s Pa)and tensile strength (18.01 ± 0.19 MPa) when 25% w/w glycerol was added as plasticizer. Filler addi-tion reinforced the starch matrix increasing its mechanical resistance: 1.5% residue content increasedover 900% the films elastic modulus. Furthermore, the obtained eco-compatible materials could be heatsealed, which indicates their suitability for packaging development. In conclusion, an integral approachto cassava roots use has been proposed, expanding its scope and providing added value to the remainingresidue of starch extraction.