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Los intereses de investigación de nuestro grupo, se enmarcan en las áreas de polímeros y nano materiales.
En los últimos años hemos hecho importantes contribuciones en el área de polímeros aplicados a la síntesis de nanopartículas metálicas y en la obtención de materiales nanocompuestos. Algunos ejemplos representativos son los siguientes:
-Block copolymers in the synthesis of gold nanoparticles. Two new approaches: Copolymer aggregates as reductants and stabilizers and simultaneous formation of copolymer aggregates and gold nanoparticles.
A. Leiva, I. Fuentes, E. Bossel, M. Urzúa, M. Méndez, M. Pino, D. Radić, V. Márquez and F. D. González-Nilo, Journal of polymer science part A: Polymer chemistry, 52, (21), 2014, 3069–3079. Trabajo seleccionado para portada.
-Improving the performance of chitosan in the synthesis and stabilization of gold nanoparticles A. Leiva, S. Bonardd, M. Pino, C. Saldías, D. Radić, European Polymer Journal, 68, 2015, 419-431.
-Biobased Chitosan Nanocomposite Films Containing Gold Nanoparticles: Obtainment, Characterization, and Catalytic Activity Assessment. Oscar Ramirez, Sebastián Bonardd, Cesar Saldías, Deodato Radic, and Ángel Leiva ACS Appl. Mater. Interfaces, 9 (19), 2017, 16561–16570.
En nuestro grupo, también durante los últimos años hemos desarrollado proyectos de investigación vinculados a las áreas de polímeros y nanomateriales, como es el caso de los proyectos:
-Nanostructuration of New Biodegradable Block Copolymers: Self Assembling in Solution and Gold-Copolymers Nanocomposites. Possible Applications.
-Interactions in polymer blends containing branched and linear polymers with small molecules.
-Supramolecular Chemistry. Complex Polymeric Systems. Design, Formation and Study of Ordered Structures Using Cyclic Molecules and Interfaces.
-Polyelectrolytes Modified with Biomolecules. Adsorption onto solid Surfaces.
-Polymer thin films containing noble metal nanoparticles. Study of synthesis, characterization and evaluation of potential applications.
-Polymer based nanocomposites focused to applications in energy conversion and storage. Two approaches: Hybrid Nanocomposites for photovoltaic applications and nanocomposite films as dielectric materials for capacitors.
También hemos participado en proyectos financiados por la Comunidad Europea
Proyecto ELAPNET - Mechanical Properties of PolymericMaterials", Unión Europea Programa ALFA II.
ECLIPSE -Renewable ECO-Friendly Poly (Lactic Acid) Nanocomposites from Waste Sources , Comunidad Europea, FP7-NMP-2011.2.3-1.
Docencia
Quimica-Física I
Físico Química Avanzada
Análisis de Sistemas Macromoleculares
Proyectos
2016-2018
New nanocomposed superhydrophobic membranes based on polymers and nanoparticles to use in membrane distillation. Co-Investigador. CORFO FDI Interés Público o Precompetitivo.
2016-2019
Polymer-based nanocomposites focused to applications in energy conversion and storage. Two approaches: hybrid nanocomposites for photovoltaic applications and nanocomposite films as dielectric materials for capacitors. Investigador Responsable. FONDECYT Regular.
2012-2015
Renewable eco-friendly poly(lactic acid) nanocomposites from waste sources. Investigador Responsable Alterno. Comunidad Europea, Séptimo Programa Marco.
2012-2016
Interactions in polymer blends containing branched and linear polymers with small molecules. Co-Investigador. CONICYT FONDECYT Regular.
2012-2015
Polymer thin films containing noble metal nanparticles. Study of synthesis, characterization and evaluation of potential applications. Investigador Responsable. FONDECYT Regular.
2011-2015
Estudio Físico Químico de la Liberación de derivados de Trolox, Encapsulados en Nanoagregados de Copolimeros en bloque biodegradables con diferencias morfológicas. Patrocinante. Proyecto FONDECYT.
2010-2014
Polyelectrolytes modified with biomolecules. Adsorption onto solid surfaces. Co-Investigador. Proyecto FONDECYT Regular.
2008-2012
Nanostructuration of New Biodegradable Block Copolymers: Self Assembling in Solution and Gold-Copolymers Nanocomposites. Possible Applications. Investigador Responsable. FONDECYT Regular.
2008-2011
Supramolecular Chemistry. Complex Polymeric Systems. Design, Formation and Study of Ordered Structures Using Cyclic Molecules and Interfaces. Co-Investigador. FONDECYT Regular.
Publicaciones
In situ preparation of film and hydrogel bio-nanocomposites of chitosan / fluorescein-copper with catalytic activity. César Saldías, David Díaz Díaz, Sebastián Bonardd, Cristián Soto-Marfull, Alexander Cordoba, Soledad Saldías, Caterina Quezada, Deodato Radic and Ángel Leiva. Carbohydrate Polymers 180 (2018) 200–208.
Oscar Ramírez, Sebastián Bonardd, César Saldías, Deodato Radic and Angel Leiva Bio-based chitosan nanocomposite films containing gold nanoparticles. Obtaining, characterization and catalytic activity assessment” ACS Appl. Mater. Interfaces 2017, 9, 16561−16570.
Maximiliano Méndez, Marcela Urzúa, Valeria Villalobos, Cesar Saldías, Mathias Schmidt, Deodato Radić and Angel Leiva. Polymer nanocomposites containing gold nanoparticles. Spontaneous generation and immobilization of gold nanoparticles on thin polymer films from ions in solution. Journal of Nanoscience and Nanotechnology, 2017.
Fabián Avila-Salas, Alfredo Pereira, Moisés A. Rojas, Mario Saavedra-Torres, Rodrigo Montecinos, Sebastián Bonardd, Caterina Quezada, Soledad Saldías, David Díaz-Díaz, Angel Leiva, Deodato Radic and César Saldías. “An experimental and theoretical comparative study of the entrapment and release of dexamethasone from micellar and vesicular aggregates of PAMAM-PCL dendrimers". European Polymer Journal 93 (2017) 507–520.
Bonardd S, Quezada C, Radic D, Leiva A, Saldias C. The Role of Polymers in the Synthesis of Noble Metal Nanoparticles: A Review. Journal Of Nanoscience And Nanotechnology. 2017;17(1):87-114.
Alvarado N, Alegria L, Sandoval C, Gargallo L, Leiva A, Radic D. Synthesis, characterization and molecular dynamics simulation of dendronized poly(3,5-diphthalimidoalkylphenyl methacrylate)s. Polimery. 2016;61(1):10-15.
Bonardd S, Schmidt M, Saavedra M, Leiva A, Radic D, Saldias C. Thermal and morphological behavior of chitosan/PEO blends containing gold nanoparticles. Experimental and theoretical studies. Carbohydrate Polymers. 2016;144(-):315-329.
Fuentes, Irma; Blanco-Fernandez, Barbara; Alvarado, Nancy; Leiva, Angel; Alvarez-Lorenzo, Carmen; Concheiro, Angel; Radic, Deodato. Encapsulation of antioxidant gallate derivatives in biocompatible poly(ε-caprolactone)-b-Pluronic-b-poly(ε-caprolactone) micelles". Langmuir, 2016, 32 (14), pp 3331–3339.
Cesar Saldías, Maximiliano Méndez, Mario Saavedra, Alfredo Pereira, Moises Rojas, Fabian Avila, Sebastian Bonardd, Maximiliano Pino, Soledad Saldias, Caterina Quezada, Angel Leiva, Deodato Radic. Interfacial behavior of PAMAM-PCL dendrimers and in situ spontaneous formation of gold nanoparticles at the toluene-water and air-water interfaces: Experimental and theoretical studies. European Polymer Journal. 2016;84:188-204.
Contardo I, Parada J, Leiva A, Bouchon P. The effect of vacuum frying on starch gelatinization and its in vitro digestibility in starch-gluten matrices. Food Chemistry. 2016;197(-):353-358.
Ingrid Contardo, Javier Parada, Angel Leiva, Pedro Bouchon. The effect of vacuum frying on starch gelatinization and its in vitro digestibility in starch¿gluten matrices. Food Chemistry. 2016;197:353-358.
Irma Fuentes, Barbara Blanco, Nancy Alvarado, Angel Leiva, Carmen Alvarez, Angel Concheiro, Deodato Radic. Encapsulation of Antioxidant Gallate Derivatives in Biocompatible Poly(ε-caprolactone)-b-Pluronic-b-Poly(ε-caprolactone) Micelles. Langmuir. 2016;32(14):3331-3339.
Natalia Herrera, Hendrik Roch, Asier M. Salaberria, Maximiliano Pino, Jalel Labidi, Susana CM Fernandes, deodato Radic, Angel Leiva, Kristiina Oksman. Functionalized blown films of plasticized polylactic acid/chitin nanocomposite: preparation and characterization. Materials & Design. 2016;92:846-852.
C. Saldias, L. Velásquez, C. Quezada, A. Leiva. Physicochemical assessment of Dextran-g-Poly (epsilon-caprolactone) micellar nanoaggregates as drug nanocarriers. Carbohydrate Polymers. 117 458-467 (2015).
L. Muñoz, F. Pedreschi, A. Leiva, J. M.l Aguilera. Loss of birefringence and swelling behavior in native starch granules: Microstructural and thermal properties. Journal of Food Engineering. 152:65-71 (2015).
N. Alvarado, L. Alegria, C. Sandoval, G. Kortaberria, A. Leiva, L. Gargallo, D. Radic. Synthesis and Characterization of a Branched Poly(Methacrylamide): Thermal Stability and Molecular Simulation Studies of Their Blends With Vinylic Polymers. Journal of Macromolecular Science Part A-Pure and Applied Chemistry. 51 (11) 864-872 (2014).
C. Saldias, A. Leiva, J. Valderas, D. Radic. Environmentally friendly synthesis of noble metal nanoparticles assisted by biodegradable dextran-graft-lactone copolymers. Polymers for Advanced Technologies. 25 (4) 372-379 (2014).
C. Saldias, A. Leiva, J. Valderas, D. Radic. Environmentally Friendly Synthesis of Noble Metal Nanoparticles Assisted by Biodegradable Dextran-graft-lactone Copolymers. Polymers for Advanced Technologies. (25) 372-379 (2014).
A. Leiva, I. Fuentes, E. Bossel, M. Urzua, M. Mendez, M. Pino, D. Radic, V. Marquez, F. González-Nilo. Block Copolymers in the Synthesis of Gold Nanoparticles. Two New Approaches: Copolymer Aggregates as Reductants and Stabilizers and Simultaneous Formation of Copolymer Aggregates and Gold Nanoparticles. Journal of Polymer Science Part A-Polymer Chemistry. 52 (21) 3069-3079 (2014).
L. Gargallo, A. Leiva, D. Radic. Surface activity of poly (itaconate) derivatives: poly (monobenzyl itaconate) and poly (dibenzylitaconate) at the air-water interface. Journal of Macromolecular Science. Part B. (53):000-000 (2014).
A. Leiva, M. Mendez, M. Pino, D. Radic In situ synthesis of gold nanoparticles at the air-water interface. Spontaneous reduction of Au(III) by poly(N-vinyl-2-pyrrolidone) monolayers European Polymer Journal, 49 (8) 2128-2137 (2013).
A. Leiva, M. Méndez, E. Bossel, L. Rubio, I. Fuentes, D. Radic. Nanostructured Polymers and Copolymers in Sinthesis of Gold and Silver Nanoparticles. Polymers for Advanced Technologies. S1 (24):117-117 (2013).
Redes
UC
Deodato Radic F., Facultad de Química.
César Saldias, Facultad de Química.
Otras redes
Marcela Urzúa, Universidad de Chile.
Galder Kortaberria Altzerreka, Universidad del País Vasco (España).
Gestión Académica
Evaluador de Proyectos I concurso de equipamiento científico y tecnológico mediano. Fondequip.01-01-2012
Miembro del Comité Científico. V Escuela de Nanoestructuras, II Congreso Nacional de Nanotecnología. 01-10-2012.
Jefe Departamento de Química Física, Facultad de Química UC. 2012-2014.
Miembro del Colegio Electoral, para representantes de Académicos en el Consejo Superior. Interfacultades. 15-01-2013.
Extensión y Divulgación
XII International Conference on Nanostructured Materials (NANO 2014). Título ponencia: Synthesis of Noble Metal Nanoparticles Using Grafted Chitosan” Moscow, Russia, 2014.
XIV SLAP Latinoamerican Symposium on Polymers
XII Ibero American Congress on Polymers. Título ponencia: Preparation and Characterization of Poly(Caprolactone)-Poly(Ethylene Oxide) Diblock and Triblock Amphyphilics Copolymers Micelles. Porto de Galhinas, PE, Brazil, 2014.
Síntesis de copolímeros de injerto sobre quitosano de poli(ε-caprolactona) y poli(N-vinil-2-pirrolidona) y sus usos en la síntesis de nanopartículas de oro.
XXX Congreso Latinoamericano de Química y 47 Congreso Mexicano de Química. CLAQ. Título ponencia: Monocapas Poliméricas utilizadas para la Sintesis de Nanopartículas de oro en la Interface Aire-Agua. México, 2012.
V Escuela de nanoestructuras, II Congreso Nacional de Nanotecnología. Título ponencia: Nanoagregados de Copolímeros en Bloque y Nanopartículas de Oro. Chile, 2012.
V Escuela de nanoestructuras, II Congreso Nacional de Nanotectnologia. Título ponencia: Películas delgadas de polímeros Biodegradables Aplicadas a la Síntesis in-situ de Nanopartículas de Oro. Chile, 2012.
V Escuela de nanoestructuras, II Congreso Nacional de Nanotectnologia. Título ponencia: Agregados de polímeros Anfifílicos de Distintas Arquitecturas. Chile, 2012.
YUCOMAT 2012. Título ponencia: onolayers and nanoeggregates of Polymers in the Synthesis of Gold Nanoparticles. Niue, 2012.
