Fine-Tuning of Physicochemical Properties and Growth Dynamics of Mycelium-Based Materials,ACS Applied Bio Materials

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Fine-Tuning of Physicochemical Properties and Growth Dynamics of Mycelium-Based Materials
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2020-01-17 , DOI: 10.1021/acsabm.9b01031
Maria Elena Antinori _{1,

2} , Luca Ceseracciu ₁ , Giorgio Mancini ₁ , José A Heredia-Guerrero ₁ , Athanassia Athanassiou ₁

Affiliation

Plastic pollution is becoming one of the most critical global problems nowadays. On the other hand, polymers are very versatile materials, and their products cannot be eliminated totally, but alternatives must be found. A very promising candidate is fungal mycelium. It is a self-growing, natural material, made of well-organized natural polymers, whose morphology, hydrodynamic, and mechanical properties can be tuned by changing the substrate of growth. In this work, we show that even small modifications in the composition of a standard fungal growth medium, potato dextrose broth (PDB), can induce significant differences in the morphology, chemical, and hydrodynamic properties of Ganoderma lucidum mycelium. The growth rate of mycelium is also influenced by the substrate of growth. Mycelium materials grown in PDB enriched with d-glucose are highly porous, thicker, and more apt to adsorb moisture with respect to mycelium materials grown in PDB with a small quantity of lignin. The latter, on the other hand, grow very fast, following a concentric pattern, and are denser and less hydrophilic. All mycelia are, however, hydrophobic, with water contact angles around 120°. Mycelia have interesting properties, tunable at the nanoscale, and are thus suitable for many applications: the methods used in this work can be applied to different strains and conditions and allow for choosing the best mycelium-based material for any use.

中文翻译：

菌丝体材料物理化学性质和生长动力学的微调

塑料污染正成为当今最严重的全球问题之一。另一方面，聚合物是非常通用的材料，它们的产品不能完全被淘汰，但必须找到替代品。一个非常有前途的候选者是真菌菌丝体。它是一种自我生长的天然材料，由组织良好的天然聚合物制成，其形态、流体动力学和机械性能可以通过改变生长基质来调节。在这项工作中，我们表明，即使对标准真菌生长培养基马铃薯葡萄糖肉汤 (PDB) 的组成进行微小的修改，也会导致灵芝的形态、化学和流体动力学特性发生显着差异菌丝体。菌丝体的生长速度也受生长基质的影响。与在含有少量木质素的 PDB 中生长的菌丝体材料相比，在富含d-葡萄糖的 PDB 中生长的菌丝体材料多孔、更厚且更易于吸附水分。另一方面，后者生长得非常快，呈同心圆状，而且密度更大，亲水性更低。然而，所有菌丝体都是疏水的，水接触角约为 120°。菌丝体具有有趣的特性，可在纳米级调节，因此适用于许多应用：这项工作中使用的方法可以应用于不同的菌株和条件，并允许为任何用途选择最佳的基于菌丝体的材料。

更新日期：2020-01-21

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