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Quantitation of the reinforcement effect of silica nanoparticles in epoxy resins used in liquid composite moulding processes

Mahrholz, Thorsten and Sinapius, Michael and Stängle, J. (2009) Quantitation of the reinforcement effect of silica nanoparticles in epoxy resins used in liquid composite moulding processes. Composites Part A: Applied Science and Manufacturing, 40 (3), pp. 235-243. Elsevier. doi: 10.1016/j.compositesa.2008.11.008. ISSN 1359-835X.

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Epoxy-silica nanocomposites are tested for their suitability as a new type of matrix for fibre-reinforced polymers (FRP) using injection technology (LCM). A key focus is determining the processing characteristics of the nanocomposites. The silica nanoparticle content varies between 0 and 25 wt% for the high performance epoxy resin. Photon Cross Correlation Spectroscopy (PCCS) and Scanning Electron Microscopy (SEM) analysis performed on the liquid and cured epoxy-silica nanocomposites indicate a nearly homogeneous distribution of the nanoscaled silica in the epoxy matrix, even at rather high weight percentages. Depending on the silica content of the composite, its stiffness, strength, and toughness can be increased significantly compared with neat resin. Moreover, resin shrinkage and the thermal expansion (CTE) can be significantly reduced and the thermal conductivity increased. Concomitant the glass transition temperature remains nearly constant. The initial viscosity of the resin increases slightly depending on the nanoparticle content, while the gel-time slightly decreases. The injectability of the nanocomposite for the purpose of lamination using the LCM technology is nearly unaffected. The optimum filler content is at app. 25 wt% silica. Epoxy-silica nanocomposites are now proven to be a new high performance polymer matrix for FRP structures manufactured by the low cost LCM techniques.

Item URL in elib:https://elib.dlr.de/58666/
Document Type:Article
Title:Quantitation of the reinforcement effect of silica nanoparticles in epoxy resins used in liquid composite moulding processes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Stängle, J.Bundeswehr Research Institute for Materials, Explosives, Fuels and LubricantsUNSPECIFIED
Date:January 2009
Journal or Publication Title:Composites Part A: Applied Science and Manufacturing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.compositesa.2008.11.008
Page Range:pp. 235-243
EditorsEmailEditor's ORCID iD
Keywords: Nano-structures, Laminates, Thermal properties, Mechanical testing, Nanocomposite
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:other
DLR - Research area:Transport
DLR - Program:V - no assignment
DLR - Research theme (Project):V - no assignment
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Ries, Doris
Deposited On:20 Apr 2009
Last Modified:10 Jan 2019 15:47

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