Chan Xin Ying, Saeidi Nazanin, Javadian Alireza, Hebel Dirk E, Gupta Manoj
Department of Mechanical Engineering, National University of Singapore (NUS), Singapore, 117575, Singapore.
Sustainable Construction, Faculty of Architecture, Karlsruhe Institute of Technology (KIT), 76131, Karlsruhe, Germany.
Sci Rep. 2021 Nov 11;11(1):22112. doi: 10.1038/s41598-021-01598-4.
Mycelium, as the root of fungi, is composed of filamentous strands of fine hyphae that bind discrete substrate particles into a block material. With advanced processing, dense mycelium-bound composites (DMCs) resembling commercial particleboards can be formed. However, their mechanical properties and performance under the working conditions of particleboards are unknown. Here, we show how weathering conditions affect the DMC stress and elastic modulus. DMC was made using Ganoderma lucidum mycelium grown on a substrate of sawdust and empty fruit bunch. The DMC was then subjected to weathering under tropical conditions over 35 days and tested under flexural, tensile, and compressive loading with reference to international standards. After exposure to specified weathering conditions, the maximum stress in flexure, tension, and compression decreased substantially. The addition of a protective coating improved the resistance of DMC to weathering conditions; however, the difference between coated and uncoated samples was only found to be statistically significant in tensile strength.
菌丝体作为真菌的根基，由纤细的菌丝丝状链组成，这些菌丝将离散的基质颗粒结合成块状材料。通过先进的加工工艺，可以形成类似于商用刨花板的致密菌丝结合复合材料（DMC）。然而，它们在刨花板工作条件下的机械性能和表现尚不清楚。在此，我们展示了风化条件如何影响DMC的应力和弹性模量。DMC是使用在锯末和空果串基质上生长的灵芝菌丝体制成的。然后将DMC在热带条件下进行35天的风化处理，并参照国际标准在弯曲、拉伸和压缩载荷下进行测试。在暴露于特定的风化条件后，弯曲、拉伸和压缩时的最大应力大幅下降。添加保护涂层提高了DMC对风化条件的抵抗力；然而，仅在拉伸强度方面发现涂覆和未涂覆样品之间的差异具有统计学意义。
