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Effects of Al(OH)O nanoparticle agglomerate size in epoxy resin on tension, bending and fracture properties

Jux, Maximilian and Finke, Benedikt and Schilde, Carsten and Mahrholz, Thorsten and Sinapius, Michael and Kwade, Arno (2017) Effects of Al(OH)O nanoparticle agglomerate size in epoxy resin on tension, bending and fracture properties. Journal of Nanoparticle Research, 19 (4), p. 139. Springer. doi: 10.1007/s11051-017-3831-9. ISSN 1388-0764.

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Official URL: http://dx.doi.org/10.1007/s11051-017-3831-9


Several epoxy Al(OH)O (boehmite) dispersions in an epoxy resin are produced in a kneader to study the mecha-nistic correlation between the nanoparticle size and mechanical properties of the prepared nanocomposites. The agglomerate size is set by a targeted variation in solid content and temperature during dispersion, resulting in a different level of stress intensity and thus a different final agglomerate size during the process. The suspension viscosity was used for the estimation of stress energy in laminar shear flow. Agglomerate size measurements are executed via dynamic light scattering to ensure the quality of the produced dispersions. Furthermore, various nanocomposite samples are prepared for three point bending, tension and fracture toughness tests. The screening of the size effect is executed with at least seven samples per agglomerate size and test method. The variation of solid content is found to be a reliable method to adjust the agglomerate size between 138-354 nm during dispersion. The size effect on the Young’s modulus and the critical stress intensity is only marginal. Nevertheless there is a statistically relevant trend showing a linear increase with a decrease in agglomerate size. In contrast, the size effect is more dominant to the sample’s strain and stress at failure. Unlike micro-scaled agglomerates or particles, which lead to embrittlement of the composite material, nano-scaled agglomerates or particles cause the composite elongation to be nearly of the same level as the base material. The observed effect is valid for agglomerate sizes between 138-354 nm and a particle mass fraction of 10 wt-%.

Item URL in elib:https://elib.dlr.de/111931/
Document Type:Article
Title:Effects of Al(OH)O nanoparticle agglomerate size in epoxy resin on tension, bending and fracture properties
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Jux, MaximilianMaximilian.Jux (at) dlr.dehttps://orcid.org/0000-0002-0175-2875
Finke, Benediktb.finke (at) tu-bs.deUNSPECIFIED
Schilde, Carstenc.schilde (at) tu-bs.deUNSPECIFIED
Mahrholz, ThorstenThorsten.Mahrholz (at) dlr.deUNSPECIFIED
Sinapius, Michaeltu braunschweig / dlr braunschweigUNSPECIFIED
Kwade, Arnoipat, tu braunschweigUNSPECIFIED
Date:April 2017
Journal or Publication Title:Journal of Nanoparticle Research
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1007/s11051-017-3831-9
Page Range:p. 139
EditorsEmailEditor's ORCID iD
Series Name:Springer Materialwissenschaften
Keywords:boehmite, nanoparticles, epoxy resin, dispersing, viscosity, fracture toughness
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Multifunctional Materials
Deposited By: Jux, Maximilian
Deposited On:05 May 2017 14:52
Last Modified:06 Sep 2019 15:16

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