Dual‐Scale Spiral Material for Balancing High Load Bearing and Sound Absorption

Porous materials with sound absorption and load‐bearing capabilities are in demand in engineering fields like aviation and rail transportation. However, achieving both properties simultaneously is challenging due to the trade‐off between interconnected pores for sound absorption and mechanical strength. Inspired by quilling art, a novel design using spiral material formed by rolling planar materials into helical structures is proposed. Experimental results show high structural strength through self‐locking mechanisms, while double porosities from interlayer spiral slits and aligned submillimeter pores provide excellent sound absorption. These spiral sheets surpass foam aluminum in specific strength (up to 5.1 MPa) and approach aerogels in sound absorption (average coefficient of 0.93 within 0–6400 Hz). With its adaptability to various planar materials, this spiral design allows for hybrid combinations of different materials for multi‐functionality, paving the way for designing advanced, lightweight porous materials for broad applications. A dual‐scale spiral material is introduced to strike a balance between mechanical performance and sound absorption. The dual‐scale spiral materials exhibit good mechanical performance due to the confinement effect and interlayer self‐locking mechanisms across multiple layers of planar material. Additionally, the spiral slits and large specific surface area inherent to dual‐scale spiral material offer possibilities for achieving sound absorption. Abundant raw material sources and environmental sustainability make them promising for diverse applications in households, industries, and transportation.