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Development of Rice Husk and Sawdust Mycelium-Based Bio-composites: Optimization of Mechanical, Physical and Thermal Properties
https://orcid.org/http://orcid.org/0000-0001-7984-262X
Demand for sustainable products is growing faster than ever before, and thus, the development of novel sustainable materials is crucial. Biological fungi have lately found application in industry as binder to plant-based residues to grow such materials. This study employed Pleurotus ostreatus as binder to rice husks and sawdust to produce foam materials that could find utilization in insulation, packaging and construction applications. The Box-Behnken experimental response surface methodology design was used to optimize the effect of substrate type, water content and incubation time on resultant physical, mechanical, thermal and fire safety properties. The developed mycelium-based bio-composites were lightweight in a range of 0.153–0.239 g/cm3. Despite being highly porous and hydrophilic with considerable water absorption in the range 85.46–243.45%, their compressive strength and stiffness peaked at 265 kPa and 0.615 MP, respectively. Thermal conductivity ranged between 0.069 and 0.080 W/mK, whereas char residues ranged between 20 and 38%. The deduced limiting oxygen index ranked all developed mycelium-based bio-composite foams were above 21%, indicating their self-extinguishing properties. Results from confirmation experiments conducted at the selected optimal conditions (20 w/w substrate type, 60% water content and 33.72 days) showed proximity between the experimental and predicted results.
Development of Rice Husk and Sawdust Mycelium-Based Bio-composites: Optimization of Mechanical, Physical and Thermal Properties
https://orcid.org/http://orcid.org/0000-0001-7984-262X
Demand for sustainable products is growing faster than ever before, and thus, the development of novel sustainable materials is crucial. Biological fungi have lately found application in industry as binder to plant-based residues to grow such materials. This study employed Pleurotus ostreatus as binder to rice husks and sawdust to produce foam materials that could find utilization in insulation, packaging and construction applications. The Box-Behnken experimental response surface methodology design was used to optimize the effect of substrate type, water content and incubation time on resultant physical, mechanical, thermal and fire safety properties. The developed mycelium-based bio-composites were lightweight in a range of 0.153–0.239 g/cm3. Despite being highly porous and hydrophilic with considerable water absorption in the range 85.46–243.45%, their compressive strength and stiffness peaked at 265 kPa and 0.615 MP, respectively. Thermal conductivity ranged between 0.069 and 0.080 W/mK, whereas char residues ranged between 20 and 38%. The deduced limiting oxygen index ranked all developed mycelium-based bio-composite foams were above 21%, indicating their self-extinguishing properties. Results from confirmation experiments conducted at the selected optimal conditions (20 w/w substrate type, 60% water content and 33.72 days) showed proximity between the experimental and predicted results.
Development of Rice Husk and Sawdust Mycelium-Based Bio-composites: Optimization of Mechanical, Physical and Thermal Properties
https://orcid.org/http://orcid.org/0000-0001-7984-262X
Demand for sustainable products is growing faster than ever before, and thus, the development of novel sustainable materials is crucial. Biological fungi have lately found application in industry as binder to plant-based residues to grow such materials. This study employed Pleurotus ostreatus as binder to rice husks and sawdust to produce foam materials that could find utilization in insulation, packaging and construction applications. The Box-Behnken experimental response surface methodology design was used to optimize the effect of substrate type, water content and incubation time on resultant physical, mechanical, thermal and fire safety properties. The developed mycelium-based bio-composites were lightweight in a range of 0.153–0.239 g/cm3. Despite being highly porous and hydrophilic with considerable water absorption in the range 85.46–243.45%, their compressive strength and stiffness peaked at 265 kPa and 0.615 MP, respectively. Thermal conductivity ranged between 0.069 and 0.080 W/mK, whereas char residues ranged between 20 and 38%. The deduced limiting oxygen index ranked all developed mycelium-based bio-composite foams were above 21%, indicating their self-extinguishing properties. Results from confirmation experiments conducted at the selected optimal conditions (20 w/w substrate type, 60% water content and 33.72 days) showed proximity between the experimental and predicted results.
Development of Rice Husk and Sawdust Mycelium-Based Bio-composites: Optimization of Mechanical, Physical and Thermal Properties
J. Inst. Eng. India Ser. D
Mbabali, Herman (author) / Lubwama, Michael (author) / Yiga, Vianney Andrew (author) / Were, Evans (author) / Kasedde, Hillary (author)
Journal of The Institution of Engineers (India): Series D ; 105 ; 97-117
2024-04-01
21 pages
Article (Journal)
Electronic Resource
English
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