In a groundbreaking discovery, researchers at the University of Tokyo have created a novel porous polymer, mimicking the structure of a loofah sponge. This innovative material, detailed in the journal *Science* in July 2025, combines virus-filtering abilities with structural strength, opening doors to various applications.
The polymer, synthesized from lignin (a component of wood), is both sustainable and adaptable. It exhibits flexibility when wet and responds to pH changes, allowing it to adjust its rigidity and porosity. This unique characteristic enables the material to filter bacteria and viruses while also serving as a robust structural component.
Associate Professor Yoshimitsu Itoh highlighted the unexpected resemblance to a natural loofah sponge, emphasizing the lightweight nature and high stiffness of the material. The polymer's low density and high stiffness make it ideal for applications requiring strength without the drawbacks of heavier, less sustainable materials. Moreover, the team developed a thin porous carbon membrane by baking the polymer, which could lead to more efficient nanoscale electronic components.
The material's potential applications are vast, ranging from filtration to structural components in devices. The researchers are now focusing on large-scale production and integration into existing manufacturing processes. This advancement in material science offers a promising, sustainable alternative for various industries.