Phase-change materials as cryo-shock absorbers in rigid polyurethane cryogenic insulation foams
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F25%3A00618005" target="_blank" >RIV/61389013:_____/25:00618005 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/2073-4360/17/6/729" target="_blank" >https://www.mdpi.com/2073-4360/17/6/729</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/polym17060729" target="_blank" >10.3390/polym17060729</a>
Alternative languages
Result language
angličtina
Original language name
Phase-change materials as cryo-shock absorbers in rigid polyurethane cryogenic insulation foams
Original language description
This study investigates the effects of microencapsulated phase-change materials (PCMs) on the density and thermal conductivity of rigid polyurethane (PU) foams, alongside their mechanical properties. Introducing PCMs into the foam composition results in increased viscosity, complicating the mixing of polyol and isocyanate components. This viscosity increase can slow the foaming rate and subsequently raise the foam density, as observed in both poured and sprayed rigid PU foams containing 5% and 10% PCM, leading to density increases of up to 9%. Despite these slight density changes, the thermal conductivity remained relatively stable due to the preservation of the foam’s closed-cell structure. The mechanical evaluation revealed a decrease in compressive and tensile strength with a higher PCM content attributed to defects arising in the foam’s cellular architecture. However, adhesive strength to aluminum substrates improved, particularly with 5% PCM, possibly due to a more consistent foam structure during the slower foaming process. Differential scanning calorimetry and a dynamic mechanical analysis indicated that the incorporation of PCM increased the glass transition temperature and affected the foam’s mechanical properties. This research underscores the potential of microencapsulated PCMs to enhance the functionality of rigid PU foams while needing careful consideration of their concentration to avoid compromising the structural integrity.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10404 - Polymer science
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Polymers
ISSN
2073-4360
e-ISSN
2073-4360
Volume of the periodical
17
Issue of the periodical within the volume
6
Country of publishing house
CH - SWITZERLAND
Number of pages
17
Pages from-to
729
UT code for WoS article
001452088800001
EID of the result in the Scopus database
2-s2.0-105001158592