Tailoring the optical and UV reflectivity of CFRP-epoxy composites: Approaches and selected results
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In: Science and Engineering of Composite Materials, Vol. 30.2023, No. 1, 20220175, 20.03.2023.
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T1 - Tailoring the optical and UV reflectivity of CFRP-epoxy composites
T2 - Approaches and selected results
AU - Haiden, Lukas
AU - Brunner, Andreas J.
AU - Pansare, Amol V.
AU - Feuchter, Michael
AU - Pinter, Gerald Gerhard
N1 - Publisher Copyright: © 2023 the author(s), published by De Gruyter.
PY - 2023/3/20
Y1 - 2023/3/20
N2 - Specific nano- and micro-scale morphologies of composites can affect the resulting optical and UV reflectivity of the materials. One example is "Vantablack®"made from aligned carbon nanotubes (CNTs) with 99.96% absorption. A similar material with CNTs grown on surface-activated aluminum (CNTs/sa-Al) even yielded 99.995% absorption, one order of magnitude higher than Vantablack®. On the other hand, fresh snow reflects 90% or more of the incident electromagnetic radiation with wavelengths between 400 and 1,000 nm. The reflectivity of snow originates from multiple scattering in the porous morphology made of snow grains. Taking these complex morphologies as inspiration, CFRP epoxy composites with different types, sizes, shapes, and amount of nanoparticles are prepared and compared regarding their optical and ultraviolet (UV) reflectivity. Increasing the reflectivity in the near and far UV may be beneficial for the durability of the epoxy composites, but selective higher or lower reflectivity in certain wavelength ranges may also yield tailored visual effects. Results from different processing approaches with selected nanoparticles are presented and discussed.
AB - Specific nano- and micro-scale morphologies of composites can affect the resulting optical and UV reflectivity of the materials. One example is "Vantablack®"made from aligned carbon nanotubes (CNTs) with 99.96% absorption. A similar material with CNTs grown on surface-activated aluminum (CNTs/sa-Al) even yielded 99.995% absorption, one order of magnitude higher than Vantablack®. On the other hand, fresh snow reflects 90% or more of the incident electromagnetic radiation with wavelengths between 400 and 1,000 nm. The reflectivity of snow originates from multiple scattering in the porous morphology made of snow grains. Taking these complex morphologies as inspiration, CFRP epoxy composites with different types, sizes, shapes, and amount of nanoparticles are prepared and compared regarding their optical and ultraviolet (UV) reflectivity. Increasing the reflectivity in the near and far UV may be beneficial for the durability of the epoxy composites, but selective higher or lower reflectivity in certain wavelength ranges may also yield tailored visual effects. Results from different processing approaches with selected nanoparticles are presented and discussed.
KW - CFRP laminates
KW - electrophoretic deposition
KW - nanoparticles
KW - visual and UV reflectivity
UR - http://www.scopus.com/inward/record.url?scp=85150659759&partnerID=8YFLogxK
U2 - 10.1515/secm-2022-0175
DO - 10.1515/secm-2022-0175
M3 - Article
AN - SCOPUS:85150659759
VL - 30.2023
JO - Science and Engineering of Composite Materials
JF - Science and Engineering of Composite Materials
SN - 0792-1233
IS - 1
M1 - 20220175
ER -