Obtención y caracterización de una membrana biopolimérica a partir de la combinación de dos almidones

Abstract

Abstract: Taking advantage of the abundance of starch rich sources that we have in Ecuador and with the purpose of contributing with alternatives to replace the conventional polymers, in the present work we proposed the elaboration of a biomembrane elaborated from the mixture of two starches and their characterization. For the isolation of starches the wet method was used, acetic acid and glycerin were used to make the membranes. The films were characterized by TGA, DRX, SEM, tensile tests, refractive index, weight increase (%) and loss of soluble matter (%). The analyzes were carried out at the facilities of Universidad Técnica Particular de Loja and Universidad Nacional del Chimborazo. The results of the analysis of the mixing membrane were: weight increase (%) 77,742 ± 10.82, loss of soluble matter (%) 32.25 ± 7.89, refractive index 1.4883, tensile strength of 4.030 ± 0.85 MPa, breaking strength 2,621 ± 0,35 MPa, proportional elongation of 28,455% ± 3,89, it was determined that it is an amorphous polymer, with homogeneous surfaces, composed by carbon, oxygen and hydrogen.