RMIT University researchers have unveiled a groundbreaking flexible nylon-film device that generates electricity when compressed. This innovation remains functional even after enduring the weight of a car multiple times, potentially paving the way for self-powered sensors on roads and other electronic devices.
Piezoelectricity, a phenomenon where certain materials like quartz, ceramics, and even bone produce an electrical charge when subjected to pressure, forms the basis of this development. The term originates from the Greek word “piezein,” meaning to press. In modern vehicles, piezo components are integral to systems such as fuel injectors, parking sensors, and airbags.
Revolutionizing Energy Harvesting
The nylon innovation from RMIT University could offer a more durable alternative for such components or support new technologies in traffic-management sensing on roads. This breakthrough addresses a longstanding issue with energy-harvesting plastics, which, while capable of generating power from movement, often lack durability for real-world applications. Additionally, it contributes to reducing carbon emissions by utilizing ambient energy naturally present in movement and pressure.
Led by Distinguished Professor Leslie Yeo and Dr. Amgad Rezk, the research team employed sound vibrations and electrical fields to reengineer the material at a molecular level. This process transformed industrial nylon into a resilient, power-generating film suitable for wearables, infrastructure, and smart surfaces.
Innovative Techniques and Potential Applications
The team used high-frequency sound vibrations and an electric field during the solidification of nylon, facilitating a more ordered molecular structure. This enabled the nylon device to generate electricity each time it was bent, squeezed, or tapped. Typically, nylon does not efficiently convert movement into electricity, limiting its potential in everyday devices. However, the team utilized nylon 11, a durable industrial plastic that can generate electricity from pressure when its molecules are carefully aligned.
“This method could power next-generation devices that need to survive real-world stresses — whether that’s wearable tech, sensors, or smart surfaces,” said Professor Yeo from the School of Engineering.
Dr. Amgad Rezk highlighted the process’s significant advantages for industry, offering an energy-efficient and scalable approach. “We’re excited to see where prospective industry partners could take this technology, from flexible electronics to sports equipment,” he remarked.
Implications for Industry and Future Developments
First author and RMIT PhD researcher Robert Komljenovic noted the nylon films’ flexibility, toughness, and reliability in maintaining their ability to convert movement into power. “Our nylon devices can harvest energy simply from compression during motion,” Komljenovic explained. “The thin-film devices are so robust, you can fold them, stretch them, even run a car over them—and they keep making power. This could mean new ways to charge small devices using compression from the movement of people, machines, or vehicles.”
The researchers are now focused on scaling up the technology for larger applications and exploring partnerships with industry to bring this innovation to market. This development follows a growing trend of integrating sustainable energy solutions into everyday technologies, highlighting the potential for a future where devices are powered by the energy generated from routine activities.
Looking Ahead
The move represents a significant step forward in the field of energy harvesting, with potential applications spanning various industries. As the world increasingly shifts towards sustainable energy solutions, innovations like this nylon film are crucial in driving the transition. The team’s work not only opens new avenues for technology integration but also sets a precedent for future research in sustainable energy harvesting materials.
