Myco-Composites and Biocomposite Design
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Questions and Answers

What significant characteristic of fungal mycelium contributes to the creation of sustainable composites?

  • High thermal resistance
  • Decomposition of metals
  • Rapid growth (correct)
  • Ability to absorb water

    • Hybrid-living mycelium composites can be manufactured using conventional mold-based processes.

    False

    What manufacturing approach is introduced to overcome limitations in the production of myco-composites?

    High-resolution biocomposite additive manufacturing

    Myco-composites are manufactured utilizing a process that leverages __________ nutritional provision to enhance mycelium growth.

    <p>selective</p> Signup and view all the answers

    Which of the following factors limit existing hybrid-living mycelium composites?

    <p>Conventional mold-based manufacturing processes</p> Signup and view all the answers

    Match the myco-composite characteristics with their benefits:

    <p>Rapid growth = Faster production time Hydrophobicity = Resistant to water damage Intrinsic regeneration = Sustainability Robust mycelium colonization = Enhanced structure</p> Signup and view all the answers

    Myco-composites can only be designed for simple geometries.

    <p>False</p> Signup and view all the answers

    What is the primary reason cast samples were not tested in compression?

    <p>Difficulty in fabricating high-quality compression samples</p> Signup and view all the answers

    Anisotropic mechanical properties are influenced by toolpath orientation.

    <p>True</p> Signup and view all the answers

    What mechanical property was observed to be the highest at a 0º toolpath orientation?

    <p>4.88 MPa</p> Signup and view all the answers

    Sample geometry and print __________ play a significant role in mechanical performance.

    <p>toolpath</p> Signup and view all the answers

    Match the following print orientations with their tensile strengths:

    <p>0º = 4.88 MPa 90º = 1.45 MPa</p> Signup and view all the answers

    What happens to cellulose fibers under shear stress during printing?

    <p>They straighten and align</p> Signup and view all the answers

    The elastic modulus in tension and compression is different in bulk materials.

    <p>False</p> Signup and view all the answers

    What does a tangent divergence value of 1 indicate regarding fiber orientation?

    <p>Parallel alignment with print direction</p> Signup and view all the answers

    Toolpath orientation creates __________ from relatively weak adhesion between parallel paths.

    <p>anisotropy</p> Signup and view all the answers

    What property of fully colonized composites reduced water absorption?

    <p>Hydrophobic mycelial hyphae</p> Signup and view all the answers

    Mycelium can bridge gaps up to 10 mm in printed biocomposite panels.

    <p>False</p> Signup and view all the answers

    What is the main advantage of bio-welded mycelium containers?

    <p>They can be opened and resealed as long as the fungi are kept alive.</p> Signup and view all the answers

    The addition of mycelium allows for the creation of _____ hinges in biocomposite panels.

    <p>flexible</p> Signup and view all the answers

    Match the properties of mycelium to their potential benefits:

    <p>Insulative = Maintains temperature Flame-resistant = Increases safety Hydrophobic = Reduces water absorption Flexible = Enhances structural performance</p> Signup and view all the answers

    What additional feature could a fully coated mycelium skin provide?

    <p>Enhanced water resistance</p> Signup and view all the answers

    The rigid biocomposite regions in a printed textile-like material bend and stretch more than the mycelium.

    <p>False</p> Signup and view all the answers

    What nutritional requirement is necessary for the continued growth of mycelium in containers?

    <p>Sufficient nutritional media.</p> Signup and view all the answers

    The initial water absorption of colonized samples is due to higher _____ levels.

    <p>porosity</p> Signup and view all the answers

    What unique capability allows mycelium to create waterproof containers?

    <p>Bio-welding</p> Signup and view all the answers

    Which of the following references discusses advancements in materials science related to myco-composites?

    <p>A.Rodrigo-Navarro et al., Nature Reviews Materials, 2021</p> Signup and view all the answers

    The Dunkin’ employees at the Stratton Student Center collected and donated spent coffee grounds for research purposes.

    <p>True</p> Signup and view all the answers

    Who specifically extended appreciation for assistance with SEM imaging?

    <p>Weaver</p> Signup and view all the answers

    The reference by M.Jones et al. was published in the journal __________ in 2020.

    <p>Mater Des</p> Signup and view all the answers

    Match the following publications with their corresponding years:

    <p>Prog Mater Sci = 2007 Nature = 2019 Biomaterials Advances = 2022 Sci Total Environ = 2020</p> Signup and view all the answers

    Which of the following fungi species was NOT mentioned for mycelium cultivation?

    <p>Ganoderma lucidum</p> Signup and view all the answers

    The mycelium is cultivated using a 6-quart pressure cooker at 15 psi for 30 minutes.

    <p>False</p> Signup and view all the answers

    What is one application of myco-composites mentioned in the content?

    <p>Novel hybrid-living materials.</p> Signup and view all the answers

    The agar solution was prepared using __________ malt extract.

    <p>2 wt%</p> Signup and view all the answers

    Match the following terms with their descriptions:

    <p>P. ostreatus = Oyster mushroom T. versicolor = Turkey tail mushroom Biocompatibility = Compatibility with living tissue Printability = Ability to be fabricated into a structure</p> Signup and view all the answers

    What parameter was NOT varied during the composite design?

    <p>Temperature</p> Signup and view all the answers

    Ecovative culture was purchased as liquid mycelium cultures.

    <p>False</p> Signup and view all the answers

    How long did it take for the petri dishes to become fully colonized?

    <p>Approximately 1 week.</p> Signup and view all the answers

    Malt extract agar plates should be __________ before use.

    <p>cooled completely</p> Signup and view all the answers

    What is the significance of computation-assisted approaches in biomateriomics?

    <p>They speed up material discovery.</p> Signup and view all the answers

    Study Notes

    Robust Myco-Composites: A Biocomposite Platform for Versatile Hybrid-Living Materials

    • Abstract: Fungal mycelium, a network of filamentous threads, thrives on lignocellulosic waste. It exhibits rapid growth, hydrophobicity, and intrinsic regeneration, effectively creating next-generation sustainable and functional composites (myco-composites). Existing myco-composites are limited by conventional mold-based manufacturing processes. A novel platform is introduced that uses high-resolution biocomposite additive manufacturing and indirect inoculation for robust and scalable mycelium colonization. These myco-composites show improved properties, such as tensile strength (up to 160 MPa), compared to existing materials.

    Biocomposite Design

    • Composition: The composite is designed using minimally processed, non-toxic, and biodegradable materials from waste streams. Chitosan and cellulose are used as the basic materials, offering mechanical properties and abundance in natural structures. Spent coffee grounds are incorporated for sustainable nutritional support of fungal growth.

    • Mechanical properties: The fully infilled 3D-printed composite demonstrates increased Young's modulus compared to cast samples in tension (up to 340 MPa). However, compressive modulus for printed material was lower than cast material due to mechanical defects in the printing.

    • Indirect inoculation: This method of fungal growth was found more effective and robust on 3D-printed structures, filling voids efficiently and displaying high biocompatibility with multiple fungi.

    Impacts of Mycelium Colonization

    • Mechanical Properties: Colonization significantly enhances mechanical properties compared to uncolonized composites, including over a fifteen-fold increase in modulus.

    • Wettability and Absorption: Full colonization improved hydrophobicity (increased contact angle). Water absorption, measured after 24 hours, was substantially lower in colonized composites.

    Bio-welded Containers and Textiles

    • Versatile applications: The platform enables the creation of foldable bio-welded containers and flexible textile-like structures. This showcases versatility in structural and textile applications. Mycelium's ability to bridge gaps offers potential for sustainable packaging.

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    Robust Myco-Composites: A Biocomposite Platform for Versatile Hybrid-Living Materials PDF

    Description

    Explore the innovative world of myco-composites, which leverage fungal mycelium and waste materials to create sustainable and functional materials. This quiz delves into the properties, manufacturing processes, and the role of biocomposites in modern applications.

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