RMIT Unveils Ultra-Durable Power-Generating Nylon Film
RMIT University researchers have developed a flexible nylon-film device that generates electricity from compression. This innovative device continues to function even after being driven over by a car multiple times, demonstrating remarkable resilience.
This breakthrough utilizes the principle of piezoelectricity. Certain materials, including quartz, some ceramics, and bone, produce an electrical charge when compressed, pressed, or vibrated. Piezoelectric components are already integral to modern vehicles, serving functions such as fuel injectors, parking sensors, and airbag systems.
The new nylon innovation offers a potentially more durable alternative material for these existing components and could support new traffic-management sensing technologies. This development addresses a long-standing challenge with energy-harvesting plastics, which often lack the durability required for practical application. Additionally, by utilizing ambient energy from movement and pressure, it contributes to carbon emission reduction.
"The new nylon innovation offers a potentially more durable alternative material for existing components and could support new traffic-management sensing technologies, while also contributing to carbon emission reduction."
Re-engineering for Resilience
The research team, led by Distinguished Professor Leslie Yeo and Associate Professor Amgad Rezk, reengineered the material at a molecular level. This was achieved using sound vibrations and electrical fields. This process transformed an industrial nylon into a resilient power-generating film suitable for wearables, infrastructure, and smart surfaces.
Specifically, high-frequency sound vibrations were applied along with an electric field as the nylon solidified, promoting a more ordered molecular structure. This technique allowed the nylon device to generate electricity when bent, squeezed, or tapped. Standard nylon does not efficiently convert movement into electricity. The team specifically used nylon-11, a durable industrial plastic, which can generate electricity from pressure when its molecules are precisely aligned.
Expert Insights
Professor Yeo stated that a simple method was discovered to transform nylon into an "incredibly resilient" energy generator. He further indicated that this method could power devices requiring durability under real-world conditions, such as wearable technology, sensors, or smart surfaces.
Dr. Amgad Rezk commented that the process offers advantages for industry due to its energy-efficient and scalable nature. He expressed interest in potential industry partnerships for applications ranging from flexible electronics to sports equipment.
Robert Komljenovic, the first author and an RMIT PhD researcher, noted the flexibility, toughness, and reliability of the nylon films. He confirmed their sustained ability to convert movement into power. Komljenovic explained that the thin-film devices are robust enough to be folded, stretched, or run over by a car while continuing to generate power. This capability could lead to new methods for charging small devices using compression from people, machines, or vehicles.
Future Applications
The researchers intend to scale up the technology for larger applications. They are also exploring collaborations with industry partners for commercialization.