Effect of Borax-Boric Acid Treatment on Fire Resistance, Thermal Stability, Acoustic, and Mechanical Properties of Mycelium Bio Composites
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Abstract
Mycelium biocomposite materials have been established as a sustainable alternative to polystyrene in single use applications like packaging. However only little investigations are done on improving their resistance to fire and heat, which can find use in newer applications. This paper focuses on the development and characterization of a mycelium-based sawdust-coir pith biocomposite material treated with a combination of fire-retardant compounds (borax and boric acid). The outcomes of fire resistance tests, such as flammability, flame penetration and rate of burning demonstrated a significant improvement in values with respect to untreated samples. However, samples having 30% boron compounds by weight in it exhibited the best fire resistance properties. The thermal analysis of treated samples indicated that the presence of fire-retardant chemicals has not significantly affected their thermal stability. The glass transition temperature (Tg) of treated mycelium composite material was found to be 212.75 °C against a value of 207.78 °C for untreated samples. The fire retardant treated mycelium composite samples having 30% boron by weight in it, exhibited an average sound absorption coefficient of 0.38 compared with a sound absorption coefficient of 0.29 for polyurethane foam. The prepared mycelium biocomposite has a self-extinguishing nature and exceptional fire resistance capabilities with an LOI value of 50%. The mechanical testing revealed that the presence of fire-retardant chemicals has significantly improved the flexural properties. However, only a marginal increase was visible in the compression strength of mycelium biocomposites.
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References
H. Zhang, “Heat-insulating materials and sound-absorbing materials,” in Building Materials in Civil Engineering. Sawston, England: Woodhead, pp. 304–423, 2011.
A. Shrivastava, Introduction to Plastics Engineering. New York: William Andrew, 2018.
A. Ashok and C. R. Rejeesh, “Investigating the biodegradability and physical properties of starch derived bioplastic films reinforced with nanosilica,” International Journal of Nanoscience, vol. 18, no. 6, 2019, Art. no. 1850037.
A. Ashok, C. R. Rejeesh, and R. Renjith, “Biodegradable polymers for sustainable packaging applications: A review,” International Journal of Bionics and Biomaterials, vol. 2, no. 2, pp. 1–11, 2016.
Plastic production and decomposition, “Plastic Soup Foundation,” 2020. [Online]. Available: https://www.plasticsoupfoundation.org/en/plastic-problem/plastic-environment/ plastic-production-decomposition/
R. Abhijith, A. Ashok, and C. R. Rejeesh, “Sustainable packaging applications from mycelium to substitute polystyrene: A review,” Materials Today: Proceedings, vol. 5, no. 1, pp. 2139– 2145, 2018. doi: 10.1016/j.matpr.2017.09.211.
J. Jose, K. N. Uvais, T. S. Sreenadh, A. V. Deepak, and C. R. Rejeesh “Investigations into the development of a mycelium biocomposite to substitute polystyrene in packaging applications,” Arabian Journal for Science and Engineering, vol. 46, pp. 2975–2984, 2021.
M. Haneef, L. Ceseracciu, C. Canale, I. S. Bayer, J. A. Heredia-Guerrero, and A. Athanassiou, “Advanced materials from fungal mycelium: Fabrication and tuning of physical properties,” Scientific Reports, vol. 7, 2017, Art. no. 41292.
L. Jiang, D. Walczyk, G. McIntyre, and W. K. Chan, “Cost modeling and optimization of a manufacturing system for mycelium-based biocomposite parts,” Journal of Manufacturing Systems, vol. 41, pp. 8–20, 2016.
Y. Xing, M. Brewer, H. El-Gharabawy, G. Griffith, and P. Jones, “Growing and testing mycelium bricks as building insulation materials,” in IOP Conference Series: Earth and Environmental Science, vol. 121, 2018, Art. no. 022032.
P. P. Dias, L. B. Jayasinghe, and D. Waldmann, “Investigation of Mycelium-Miscanthus composites as building insulation material,” Results in Materials, vol. 10, 2021, Art. no. 100189.
S. Sivaprasad, S. K. Byju, C. Prajith, J. Shaju, and C. R. Rejeesh, “Development of a novel mycelium bio-composite material to substitute for polystyrene in packaging applications,” Materials Today: Proceedings, vol. 47, pp. 5038– 5044, 2021.
M. G. Pelletier, G. A. Holt, J. D. Wanjura, E. Bayer, and G. McIntyre, “An evaluation study of mycelium based acoustic absorbers grown on agricultural by-product substrates,” Industrial Crops and Products, vol. 51, pp. 480–485, 2013.
R. C. Rajendran, “Packaging applications of fungal mycelium-based biodegradable composites,” in Fungal Biopolymers and Biocomposites: Prospects and Avenues. Singapore: Springer Nature Singapore, pp. 189–208, 2022.
M. Jones, A. Mautner, S. Luenco, A. Bismarck, and S. John, “Engineered mycelium composite construction materials from fungal biorefineries: A critical review,” Materials & Design, vol. 187, 2020, Art. no. 108397.
Z. A. Nagieb, M. A. Nassar, and M. G. El-Meligy, “Effect of addition of boric acid and borax on fire-retardant and mechanical properties of urea formaldehyde saw dust composites,” International Journal of Carbohydrate Chemistry, vol. 2011, 2011, Art. no. 146763.
C. R. Rejeesh and K. K. Saju, “Relative improvements in flame resistance of coir fiber boards treated with fire-retardant solution,” Journal of Wood Science, vol. 64, pp. 697–705, 2018.
F. Özdemir and A. Tutuş “Effects of fire retardants on the combustion behavior of high-density fiberboard,” BioResources, vol. 8, no. 2, 2013.
C. Bruscato, E. Malvessi, R. N. Brandalise, and M. Camassola, “High performance of macrofungi in the production of mycelium-based biofoams using sawdust—Sustainable technology for waste reduction,” Journal of Cleaner Production, vol. 234, pp. 225–232, 2019.
M. N. Shashirekha and S. Rajarathnam, “Bioconversion and biotransformation of coir pith for economic production of Pleurotus florida: Chemical and biochemical changes in coir pith during the mushroom growth and fructification,” World journal of Microbiology and biotechnology, vol. 23, pp. 1107–1114, 2007.
M. R. Islam, G. Tudryn, R. Bucinell, and R. C. Picu, “Mechanical behavior of mycelium-based particulate composites,” Journal of Materials Science, vol. 53, pp. 16371–16382, 2018.
R. Bodirlau, C. A. Teaca, and I. Spiridon, “Chemical modification of beech wood: Effect on thermal stability,” BioResources, vol. 3, no. 3, pp. 789–800, 2008.
C. R. Rejeesh and K. K. Saju, “Effect of chemical treatment on fire-retardant properties of medium density coir fiber boards,” Wood and Fiber Science, vol. 49, no. 3, pp. 332–337, 2017.
M. J. John, “Chapter 2 - Flammability performance of biocomposites,” in Woodhead Publishing Series in Composites Science and Engineering, Green Composites for Automotive Applications, G. Koronis and A. Silva, Eds. Sawston, England: Woodhead, pp. 43–58, 2019.
C. Girometta, A. M. Picco, R. M. Baiguera, D. Dondi, S. Babbini, M. Cartabia, M. Pellegrini, and E. Savino, “Physico-mechanical and thermodynamic properties of mycelium-based biocomposites: A review,” Sustainability, vol. 11, no. 1, 2019, Art. no. 281.
Y. Li and S. Ren, “Acoustic and Thermal Insulating Materials,” in Woodhead Publishing Series in Civil and Structural Engineering, Building Decorative Materials. Sawston, England: Woodhead, pp. 359–374, 2011.