@misc{10498/26711,
year = {2022},
month = {3},
url = {http://hdl.handle.net/10498/26711},
abstract = {Additive Manufacturing (AM) offers remarkable advantages in relation to traditional methods
used to obtain solid structures, such as the capability to obtain customized complex geometries
adapted to individual requirements. The design of novel nanocomposites suitable for AM is an
excellent strategy to widen the application field of these techniques. In this work, we report on
the fabrication of metal/polymer nanocomposites with enhanced optical/electrical behaviour for
stereolithography (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 through
the material for the larger concentration of AgClO4 precursor tested was observed, in contrast to
the isolated agglomerations found when the precursor amount was reduced to 0.1%. A significant
reduction in the electrical resistivity up to four orders of magnitude was found for this material
compared to the unfilled resin. However, consumption of part of the photoinitiator in the formation
process 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 longer
curing times showed that, for the higher AgClO4 concentrations tested, post-curing times of 300 min
allowed an 80% degree of polymerization to be achieved. These conditions turned these materials
into promising candidates to obtain solid structures with multifunctional properties.},
organization = {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.},
publisher = {MDPI},
keywords = {additive manufacturing},
keywords = {stereolithography},
keywords = {polymer-based nanocomposites},
keywords = {acrylic resin},
keywords = {silver nanoparticles},
keywords = {in situ generation},
title = {Synthesis of Silver Nanocomposites for Stereolithography: In Situ Formation of Nanoparticles},
doi = {10.3390/polym14061168},
author = {Valencia Liñán, Luisa María and Mata Fernández, María de la and Sanz de León, Alberto and Delgado González, Francisco Javier and Molina Rubio, Sergio Ignacio},
}