Mushroom skins could be the secret to recyclable electronics
Electronic waste is one of the fastest-growing environmental challenges of the 21st century. Billions of discarded devices, from smartphones to wearable sensors, end up in landfills each year, releasing toxic chemicals and heavy metals into the environment. A major obstacle in recycling these devices is the Printed Circuit Board (PCB) substrate, typically made from high-density plastic polymers. These materials are difficult to separate from valuable components such as gold, copper, and rare-earth metals, making recycling labour-intensive and often uneconomical. Researchers at Johannes Kepler University in Austria believe they may have found a solution in an unexpected source: the protective skin of the Ganoderma lucidum mushroom, also known as Reishi. Their innovative approach, called MycelioTronics, could transform how electronics are manufactured and disposed of.
The concept is based on using mushroom mycelium —the fibrous root structure of fungi —as a substrate for electronic components. Grown on low-cost agricultural or wood waste, this material is highly sustainable and environmentally friendly. When dried, the mycelium skin exhibits impressive electrical and mechanical properties. It is flexible, resilient, and highly heat-resistant, able to endure the high temperatures required for soldering chips onto the board. In addition, it can withstand thousands of bending cycles, making it ideal for flexible electronics and wearable technology. The combination of durability and performance ensures that devices built with mycelium substrates can function reliably for their intended lifespan.
One of the most remarkable aspects of MycelioTronics is its circularity. The material remains stable when dry, allowing electronics to perform without degradation. However, once placed in soil or home compost, the mycelium rapidly decomposes within weeks. This degradation process is harmless and efficiently releases the embedded electronic components, making it much easier and cheaper to recover valuable metals. By removing the need for complex chemical or mechanical separation, this approach could revolutionize e-waste recycling, turning a major environmental problem into a manageable, natural process.
Initial applications are focused on devices with a short lifecycle. Wearables, electronic tags, small sensors, and medical monitoring devices all fit naturally within this model, as they are often discarded after a brief period of use. The technology could also be applied in medical electronics that need to function for a fixed time before safely degrading. Compared with traditional plastic-based substrates, mushroom-based electronics require far less energy and water to produce. By using agricultural or wood waste as a feedstock, the process can also approach carbon neutrality, providing an environmentally superior alternative to fossil-fuel-derived polymers.
Despite its promise, significant challenges remain before MycelioTronics can be scaled for mass production. Growing and processing mushroom skins into uniform sheets suitable for high-precision electronics is a complex task. Slight variations in thickness or texture could interfere with microchip placement, requiring careful refinement of cultivation and processing techniques. Additionally, while the mycelium substrate solves one critical problem, the ultimate goal is a fully biodegradable electronic system, including chips and wiring. Achieving this level of circularity will require further innovation in materials science. Scaling production to compete with billions of tons of plastic used in the global electronics industry also remains a significant hurdle. Expanding fungal cultivation and ensuring consistent, high-quality output will be critical for the technology’s commercial viability.
Nevertheless, MycelioTronics represents a powerful proof of concept for sustainable electronics. By turning a natural, renewable material into a high-performance electronic substrate, researchers have demonstrated a viable pathway to reduce e-waste and recover valuable resources without toxic industrial processes. Mushroom skin may not yet replace all plastics in electronics, but it offers a glimpse of a future where devices can be both high-tech and environmentally responsible. In this vision, the end of a device’s life is not a wasteful disposal problem but an opportunity for natural decomposition and resource recovery, a small but significant step toward a truly circular electronics economy.
