Flexible Thermoplastic Starch Films Functionalized With Copper Particles for Packaging of Food Products
| Autor: | Olivia Valeria Lopez, María Emilia Villanueva, Guillermo Javier Copello, Marcelo A. Villar |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Copper particles
Thermoplastic Materials science Starch ANTIMICROBIAL PACKAGING Composite number chemistry.chemical_element Nanoparticle 02 engineering and technology chemistry.chemical_compound ACTIVE FILMS 0404 agricultural biotechnology Ultimate tensile strength COPPER PARTICLES Materials of engineering and construction. Mechanics of materials Thermoplastic starch chemistry.chemical_classification Aqueous solution 04 agricultural and veterinary sciences 021001 nanoscience & nanotechnology 040401 food science Copper chemistry Chemical engineering purl.org/becyt/ford/2 [https] TA401-492 Antimicrobial packaging Elongation 0210 nano-technology purl.org/becyt/ford/2.5 [https] Active films THERMOPLASTIC STARCH |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET Functional Composite Materials, Vol 1, Iss 1, Pp 1-10 (2020) |
| DOI: | 10.21203/rs.3.rs-33435/v3 |
| Popis: | Biodegradable films based on thermoplastic corn starch (TPS) and copper particles with antimicrobial capacity were developed. Copper nanoparticles (Cu) and silica coated copper microparticles (Si-Cu) in the range of 0.25 to 5% were used. Composite films were obtained by melt-mixing and subsequent thermo-compression. Particles distributionwithin TPS matrix and the presence of some pores and cracks, induced by Si-Cu particles, was evaluated by SEM. The presence of both fillers gave composite films a brown pigmentation and decreased their transparency; these effects were more pronounced at higher particles concentrations. Regarding mechanical properties, copper particles at 1 and 5% acted as reinforcing agents increasing the maximum tensile strength but their presence lead to a decrease in elongation at break, affecting films ductility. Composites inhibited the growth of Gram+ and Gram- bacteria, demonstrating their antimicrobial capacity. Copper effectively migrated to a simulant of aqueous foods and naked particles concentration in the simulant medium resulted higher than the minimum inhibitory concentration for bacteria. The characteristics and properties of developed composite films make them an interesting material for food primary packaging, mainly for meat fresh products. Fil: Lopez, Olivia Valeria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Villanueva, María Emilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Metabolismo del Fármaco. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Metabolismo del Fármaco; Argentina. Universidad Nacional de Luján; Argentina Fil: Copello, Guillermo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Química y Metabolismo del Fármaco. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Instituto de Química y Metabolismo del Fármaco; Argentina Fil: Villar, Marcelo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina |
| Databáze: | OpenAIRE |
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