• English
  • Deutsch
  • Log In
    Password Login
    or
  • Research Outputs
  • Projects
  • Researchers
  • Institutes
  • Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Artikel
  4. Shape Memory Polymer Foam with Programmable Apertures
 
  • Details
  • Full
Options
2020
Journal Article
Titel

Shape Memory Polymer Foam with Programmable Apertures

Abstract
In this work, a novel type of polyester urethane urea (PEUU) foam is introduced. The foam was produced by reactive foaming using a mixture of poly(1,10decamethylene adipate) diol and poly(1,4butylene adipate) diol, 4,4?-diphenylmethane diisocyanate, 1,4butanediol, diethanolamine and water as blowing agent. As determined by differential scanning calorimetry, the melting of the ester-based phases occurred at temperatures in between 25 °C and 61 °C, while the crystallization transition spread from 48 °C to 20 °C. The mechanical properties of the foam were simulated with the hyperplastic models Neo-Hookean and Ogden, whereby the latter showed a better agreement with the experimental data as evidenced by a Pearson correlation coefficient R² above 0.99. Once thermomechanically treated, the foam exhibited a maximum actuation of 13.7% inheating-cooling cycles under a constant external load. In turn, thermal cycling under load-free conditions resulted in an actuation of more than 10%. Good thermal insulation properties were demonstrated by thermal conductivities of 0.039 W·(m·K)-1 in the pristine state and 0.052 W·(m·K)-1in a state after compression by 50%, respectively. Finally, three demonstrators were developed, which closed an aperture or opened it again simply by changing the temperature. The self-sufficient material behavior is particularly promising in the construction industry, where programmable air slots offer the prospect of a dynamic insulation system for an adaptive building envelope.
Author(s)
Walter, Mario
Fraunhofer-Institut für Angewandte Polymerforschung IAP
Friess, Fabian
Fraunhofer-Institut für Angewandte Polymerforschung IAP
Krus, Martin
Fraunhofer-Institut für Bauphysik IBP
Hassan Zolanvari, Seyed Mohammad
Fraunhofer-Institut für Bauphysik IBP
Grün, Gunnar orcid-logo
IBFraunhofer-Institut für Bauphysik IBP
Kröber, Hartmut
Fraunhofer-Institut für Chemische Technologie ICT
Pretsch, Thorsten
Fraunhofer-Institut für Angewandte Polymerforschung IAP
Zeitschrift
Polymers. Online resource
Funder
Fraunhofer-Gesellschaft FhG
DOI
10.3390/polym12091914
File(s)
N-599707.pdf (7.43 MB)
Language
English
google-scholar
Fraunhofer-Institut für Angewandte Polymerforschung IAP
Fraunhofer-Institut für Bauphysik IBP
Fraunhofer-Institut für Chemische Technologie ICT
Tags
  • foam

  • programmable material...

  • polyester urethane ur...

  • actuation

  • construction

  • air slot

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Send Feedback
© 2022