RT info:eu-repo/semantics/article
T1 Improvement of the thermal conductivity of micronized nanocellular poly(methyl-methacrylate) (PMMA) by adding infrared blockers
A1 Sánchez Calderon, Ismael
A1 Lizalde Arroyo, Félix
A1 Martín de León, Judith
A1 Rodríguez Pérez, Miguel Ángel
A1 Bernardo García, Victoria
K1 Thermal conductivity
K1 Poly(methyl-methacrylate)
K1 Micronized nanocellular polymer
K1 Infrared blockers
K1 VIP
K1 23 Química
AB Micronized nanocellular polymers show great potential to be used as core materials for vacuum insulation panels due to their reduced thermal conductivity under vacuum. However, as a result of their nanocellular structure, these materials are characterized by thermal radiation contributions higher than 4 mW/(m·K). This work studies how to further enhance their thermal insulation behavior by adding infrared blockers to reduce thermal radiation. Three different opacifiers (titanium(IV) oxide, graphene nanoplatelets, and silicon carbide) are used in different contents (2.5, 5, 10, 15, and 20 wt%). The obtained powders are characterized to determine the apparent density, the particle size distribution, and the thermal conductivity. The addition of infrared blockers leads to an increase in apparent density which is also related to the opacifier’s particle size. For each infrared blocker, there is an optimum concentration to achieve the minimum thermal conductivity. Finally, compacted panels are produced to analyze their behavior as VIP cores by measuring thermal conductivity under vacuum conditions. A minimum thermal conductivity of 9.6 mW/(m·K) is obtained for the compacted panel containing 10 wt% of silicon carbide, a reduction of 2 mW/(m·K) regarding the sample without opacifier.
PB Elsevier
SN 0950-0618
YR 2025
FD 2025
LK https://uvadoc.uva.es/handle/10324/76995
UL https://uvadoc.uva.es/handle/10324/76995
LA eng
NO Construction and Building Materials, 2025, vol. 489, p. 140522
NO Producción Científica
DS UVaDOC
RD 30-sep-2025