Researchers at Germany’s Saarland University have developed an ultrathin polymer film that could transform the design and operation of vacuum pumps, eliminating the need for motors, compressed air and lubricants.
At the core of the innovation is a silicone membrane just 50 micrometres thick – roughly the width of a human hair – that responds to electrical voltage by moving in controlled patterns. This motion enables the film to act as a miniature actuator, generating forces typically produced by bulkier mechanical systems.
Professor Paul Motzki’s team at Saarland University is showcasing a prototype vacuum pump at the Hannover Messe trade fair in Hall 11, Stand D41, from 20 to 24 April 2026.
Because the motion of the film can be precisely controlled, it can be used to deliver localized pushing and pulling forces, generating movements that would otherwise require motors or compressed air systems. These capabilities are being applied to vacuum pumps used in industries ranging from manufacturing to medical technology.
“Using dielectric elastomers – as these electrically responsive polymer films are known – we can tailor pump geometries to specific requirements. That means that we can create forms that would not be technically feasible using conventional approaches. For example, we can produce extremely thin, flat designs comparable to the shape of a smartphone,” says Professor Motzki.
The latest prototype features a dual-drive system, improving performance over earlier designs. “We can connect the two actuators either in parallel or in series, increasing pressure, volumetric flow rate and overall power,” explains Professor Motzki.
The pumps operate quietly, require no rare materials, and are suitable for cleanroom environments. “Depending on the operating mode, our membrane pumps can also be very energy efficient,” says Professor Motzki.
