RT journal article
T1 Synthesis of Silver Nanocomposites for Stereolithography: In Situ Formation of Nanoparticles
A1 Valencia Liñán, Luisa María
A1 Mata Fernández, María de la
A1 Sanz de León, Alberto
A1 Delgado González, Francisco Javier
A1 Molina Rubio, Sergio Ignacio
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 additive manufacturing
K1 stereolithography
K1 polymer-based nanocomposites
K1 acrylic resin
K1 silver nanoparticles
K1 in situ generation
AB Additive Manufacturing (AM) offers remarkable advantages in relation to traditional methodsused to obtain solid structures, such as the capability to obtain customized complex geometriesadapted to individual requirements. The design of novel nanocomposites suitable for AM is anexcellent strategy to widen the application field of these techniques. In this work, we report onthe fabrication of metal/polymer nanocomposites with enhanced optical/electrical behaviour forstereolithography (SLA). In particular, we analyse the in situ generation of Ag nanoparticles (NPs)from Ag precursors (AgNO3 and AgClO4) within acrylic resins via SLA. Transmission electron microscopy(TEM) analysis confirmed the formation of Ag NPs smaller than 5 nm in all nanocomposites,providing optical activity to the materials. A high density of Ag NPs with a good distribution throughthe material for the larger concentration of AgClO4 precursor tested was observed, in contrast tothe isolated agglomerations found when the precursor amount was reduced to 0.1%. A significantreduction in the electrical resistivity up to four orders of magnitude was found for this materialcompared to the unfilled resin. However, consumption of part of the photoinitiator in the formationprocess of the Ag NPs contributed to a reduction in the polymerization degree of the resin and,consequently, degraded the mechanical properties of the nanocomposites. Experiments with longercuring times showed that, for the higher AgClO4 concentrations tested, post-curing times of 300 minallowed an 80% degree of polymerization to be achieved. These conditions turned these materialsinto promising candidates to obtain solid structures with multifunctional properties.
PB MDPI
SN 2073-4360
YR 2022
FD 2022-03
LK http://hdl.handle.net/10498/26711
UL http://hdl.handle.net/10498/26711
LA eng
NO This work has been co-financed by the 2014-2020 ERDF Operational Programme and by the Department of Economy, Knowledge, Business and University of the Regional Government of Andalusia (Ref: FEDER-UCA18-106586). Co-funding from UE and Junta de Andalucia (research group INNANOMAT, ref. TEP946) are also acknowledged. L. M. Valencia thanks FPI UCA Program. A.S. de Leon acknowledges Ministry of Science, Innovation and Universities for his Juan de la Cierva Incorporacion postdoctoral fellowship (IJC2019-041128-I). TEM/STEM measurements were carried out at the DME-SC-ICyT-ELECMI-UCA.
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026