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Artículos científicos

URI permanente para esta colecciónhttp://10.0.96.45:4000/handle/11056/14610

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Examinando Artículos científicos por Materia "ALMIDÓN"

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    Evaluating the Effect of Iron(III) in the Preparation of a Conductive Porous Composite Using a Biomass Waste-Based Starch Template
    (Multidisciplinary Digital Publishing Institute (MDPI) (Suiza), 2023) Rodríguez-Quesada, Laria; Ramírez-Sánchez, Karla; León-Carvajal, Sebastián; Sáenz-Arce, Giovanni; Vásquez-Sancho, Fabián; Avendaño-Soto, Esteban; Montero-Rodríguez, Juan José; Starbird-Perez, Ricardo
    Abstract. In this work, the effect of iron(III) in the preparation of a conductive porous composite using a biomass waste-based starch template was evaluated. Biopolymers are obtained from natural sources, for instance, starch from potato waste, and its conversion into value-added products is highly significant in a circular economy. The biomass starch-based conductive cryogel was polymerized via chemical oxidation of 3,4-ethylenedioxythiophene (EDOT) using iron(III) p-toluenesulfonate as a strategy to functionalize porous biopolymers. Thermal, spectrophotometric, physical, and chemical properties of the starch template, starch/iron(III), and the conductive polymer composites were evaluated. The impedance data of the conductive polymer deposited onto the starch template confirmed that at a longer soaking time, the electrical performance of the composite was improved, slightly modifying its microstructure. The functionalization of porous cryogels and aerogels using polysaccharides as raw materials is of great interest for applications in electronic, environmental, and biological fields.
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    Evaluation of Conductive Porous Biobased Composites with Tunable Mechanical Properties for Potential Biological Applications
    (ACS Publications (Estados Unidos), 2024) Rodríguez-Quesada, Laria; Ramírez-Sánchez, Karla; Formosa-Dague, Cécile; Dague, Etienne; Sáenz-Arce, Giovanni; García-González, Carlos A.; Vásquez-Sancho, Fabián; Avendaño-Soto, Esteban; Starbird-Pérez, Ricardo
    Abstract. In this work, starch-based porous cryogels with controlled mechanical and electrical properties were prepared for tissue engineering applications. The starch cryogels were formulated using κ-carrageenan, poly(vinyl alcohol) (PVA), and styrylpyridinium-substituted PVA (SbQ) into the composite. A conductive cryogel was polymerized by chemical oxidation of 3,4-ethylenedioxythiophene (EDOT) using iron(III) p-toluenesulfonate as a strategy to control the electrical properties. The physical, thermal, and mechanical properties were evaluated for the obtained composites. Macro- and nanoscale results confirmed the capability of tuning the mechanical properties of the material by the addition of biopolymers in different contents. The presence of κ-carrageenan significantly increased the storage modulus and decreased the damping effect in the formulations. The presence of PVA showed a plasticizing effect in the formulations, confirmed by the buffering effect and an increase in storage modulus. PVA-SBQ improved the mechanical properties by cross-linking. The addition of PEDOT increased the mechanical and electrical properties of the obtained materials.