Lightweight lignocellulosic foams for thermal insulation
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2022-02
Major/Subject
Mcode
Degree programme
Language
en
Pages
17
Series
Cellulose, Volume 29, issue 3, pp. 1855-1871
Abstract
Foams are mainly composed of dispersed gas trapped in a liquid or solid phase making them lightweight and thermally insulating materials. Additionally, they are applicable for large surfaces, which makes them attractive for thermal insulation. State-of-the-art thermally insulating foams are made of synthetic polymeric materials such as polystyrene. This work focuses on generating foam from surfactants and renewable lignocellulosic materials for thermally insulating stealth material. The effect of two surfactants (sodium dodecyl sulphate (SDS) and polysorbate (T80)), two cellulosic materials (bleached pulp and nanocellulose), and lignin on the foaming and stability of foam was investigated using experimental design and response surface methodology. The volume-optimized foams determined using experimental design were further studied with optical microscopy and infrared imaging. The results of experimental design, bubble structure of foams, and observations of their thermal conductivity showed that bleached pulp foam made using SDS as surfactant produced the highest foam volume, best stability, and good thermal insulation. Lignin did not improve the foaming or thermal insulation properties of the foam, but it was found to improve the structural stability of foam and brought natural brown color to the foam. Both wet and dry lignocellulosic foams provided thermal insulation comparable to dry polystyrene foam.Description
Lisään tiedoston kun VoR on julkaistu Acknowledgments The authors thank Marja Ka¨rkka¨inen for providing the bleached pulp and Tuyen Nguyen for providing cellulose nanofibrils. We are grateful for the support by the FinnCERES Materials Bioeconomy Ecosystem and this work made use of Aalto University Bioeconomy Facilities. Funding Open Access funding provided by Aalto University. This work was funded by The Scientific Advisory Board for Defence (MATINE, 2500 M-0110).
Keywords
Other note
Citation
Lohtander, T, Herrala, R, Laaksonen, P, Franssila, S & Österberg, M 2022, ' Lightweight lignocellulosic foams for thermal insulation ', Cellulose, vol. 29, no. 3, pp. 1855-1871 . https://doi.org/10.1007/s10570-021-04385-6