Physical Properties and Hygrothermal Behavior of Mycelium-Based Composites as Foam-Like Wall Insulation Material

Abstract:

This research aims to study mycelium-based composites (MBC) by assessing their performance as foam-like wall insulation material. Various substrates have been selected to get optimized performance of the composite. Results showed that a prolonged growing period arose a denser mycelium outer layer in MBC, which rendered better water resistance due to the hydrophobicity of mycelium. Thermal conductivity and mechanical properties are highly dependent on substrate choices than other parameters of MBC, which coincided with the literature. Additionally, influences of accelerated aging test and moisture buffer capacity of MBC were first studied in this research. The results indicated that MBC not only maintained good functional performance after the accelerated aging test (i.e. drying and wetting cycles) but also constituted good moisture buffer capacity. This means that MBC has key material essences to apply as internal wall insulation material and become one of the layers in vapor-permeable building envelope systems to passively regulate indoor relative humidity and thermal comfort.

• Periodical: Construction Technologies and Architecture (Volume 1)
• Pages: 643-651
• DOI: https://doi.org/10.4028/www.scientific.net/CTA.1.643
• Online since: January 2022
• Authors: Florent Gauvin*, Vesta Tsao, Joost Vette, Henricus Jozef Hubertus Brouwers
• Keywords: Insulation, Mycelium, Physical Properties

References

[1] Abhijith, R., Ashok, A., & Rejeesh, C. R. (2018). Sustainable packaging applications from mycelium to substitute polystyrene : a review. Materials Today: Proceedings, 5(1), 2139–2145. https://doi.org/10.1016/j.matpr.2017.09.211.

DOI: 10.1016/j.matpr.2017.09.211

[2] Binder, A., Zirkelbach, D., & Künzel, H. (2017). Test Method To Quantify The Wicking Properties Of Porous Insulation Materials Designed To Prevent Interstitial Condensation Test Method To Quantify The Wicking Properties Of Porous Insulation Materials Designed To Prevent Interstitial Condensation. AIP Conference Proceedings, 242(2010).

DOI: 10.1063/1.3453818

[3] Cerolini, S., Orazio, M. D., Perna, C. Di, & Stazi, A. (2009). Moisture buffering capacity of highly absorbing materials. Energy & Buildings, 41, 164–168. https://doi.org/10.1016/j.enbuild.2008.08.006.

DOI: 10.1016/j.enbuild.2008.08.006

[4] Elsacker, E., Vandelook, S., Brancart, J., Peeters, E., & De Laet, L. (2019). Mechanical , physical and chemical characterisation of mycelium-based composites with different types of lignocellulosic substrates. PLoS ONE, 14(7).

DOI: 10.1371/journal.pone.0213954

[5] Elsacker, E., Vandelook, S., Wylick, A. Van, Ruytinx, J., Laet, L. De, & Peeters, E. (2020). Science of the Total Environment A comprehensive framework for the production of mycelium-based lignocellulosic composites. Science of the Total Environment, 725, 138431. https://doi.org/10.1016/j.scitotenv.2020.138431.

DOI: 10.1016/j.scitotenv.2020.138431

[6] Girometta, C., Picco, A. M., Baiguera, R. M., Dondi, D., Babbini, S., Cartabia, M., Pellegrini, M., & Savino, E. (2019). Physico-Mechanical and Thermodynamic Properties of Mycelium-Based Biocomposites : A Review. Sustainability, 11. https://doi.org/10.3390/su11010281.

DOI: 10.3390/su11010281

[7] Jones, M., Chun, H., Yuen, R., & John, S. (2018). Waste ‐ derived low ‐ cost mycelium composite construction materials with improved fire safety. Wiley, April, 816–825. https://doi.org/10.1002/fam.2637.

DOI: 10.1002/fam.2637

[8] Kreiger, B. K., & Srubar, W. V. (2019). Moisture buffering in buildings : A review of experimental and numerical methods. Energy & Buildings, 202, 109394. https://doi.org/10.1016/j.enbuild.2019.109394.

DOI: 10.1016/j.enbuild.2019.109394

[9] Lee, J., Kim, J., Song, D., Kim, J., & Jang, C. (2017). Impact of external insulation and internal thermal density upon energy consumption of buildings in a temperate climate with four distinct seasons. Renewable and Sustainable Energy Reviews, 75(January 2016), 1081–1088. https://doi.org/10.1016/j.rser.2016.11.087.

DOI: 10.1016/j.rser.2016.11.087

[10] Roberts, B. C., Webber, M. E., & Ezekoye, O. A. (2015). Development of a multi-objective optimization tool for selecting thermal insulation materials in sustainable designs. Energy & Buildings, 105, 358–367. https://doi.org/10.1016/j.enbuild.2015.07.063.

DOI: 10.1016/j.enbuild.2015.07.063

[11] Rode, C., Peuhkuri, R. H., Mortensen, L. H., Hansen, K. K., Time, B., Gustavsen, A., Ojanen, T., Ahonene, J., Svennberg, K., & Arfvidsson, J. (2005). Moisture Buffering of Building Materials. DTU.

DOI: 10.1520/stp45403s

[12] Rode, C., Peuhkuri, R., Time, B., Svennberg, K., Ojanen, T., Mukhopadhyaya, P., Kumaran, M., & Dean, S. W. (2007). Moisture Buffer Value of Building Materials. Journal of ASTM International, 4(5), 100369. https://doi.org/10.1520/jai100369.

DOI: 10.1520/jai100369