Revalorization of Yerba Mate Residues: Biopolymers-Based Films of Dual Wettability as Potential Mulching Materials
Author:
Sanchez Laura M.1ORCID, de Haro Jorge2, Domínguez Eva3ORCID, Rodríguez Alejandro2ORCID, Heredia Antonio1, Benítez José J.4ORCID
Affiliation:
1. Departamento de Biología Molecular y Bioquímica, Facultad de Ciencias, Instituto de Hortofruticultura Subtropical y Mediterránea “La Mayora”, Universidad de Málaga, Consejo Superior de Investigaciones Científicas (IHSM, UMA-CSIC), 29071 Malaga, Spain 2. BioPrEn Group (RNM 940), Chemical Engineering Department, Instituto Químico para la Energía y el Medioambiente (IQUEMA), Faculty of Science, Universidad de Córdoba, 14014 Cordoba, Spain 3. Departamento de Mejora Genética y Biotecnología, Estación Experimental La Mayora, Algarrobo-Costa, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, Universidad de Málaga, Consejo Superior de Investigaciones Científicas, 29750 Malaga, Spain 4. Instituto de Ciencia de Materiales de Sevilla (ICMS), Centro Mixto CSIC, Universidad de Sevilla, Americo Vespucio 49, Isla de la Cartuja, 41092 Seville, Spain
Abstract
Biodegradable mulching films are a very attractive solution to agronomical practices intended to achieve more successful crop results. And, in this context, the employment of agricultural and industrial food residues as starting material for their production is an alternative with economic and environmental advantages. This work reports the preparation of bilayer films having two different wettability characteristics from three bio-derived biopolymers: TEMPO-oxidized cellulose nanofibers isolated from infused Yerba Mate residues, Chitosan and Polylactic acid. The infused Yerba Mate residues, the isolated and oxidized cellulose nanofibers, and the films were characterized. Nanofibrillation yield, optical transmittance, cationic demand, carboxyl content, intrinsic viscosity, degree of polymerization, specific surface area and length were studied for the (ligno)cellulose nanofibers. Textural and chemical analysis, thermal and mechanical properties studies, as well as water and light interactions were included in the characterization of the films. The bilayer films are promising materials to be used as mulching films.
Funder
Agencia Estatal de Investigación, Ministerio de Ciencia e Innovación
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