Multifunctional cellulose wood with effective acoustic absorption

Wood is a sustainable material with big sound absorption potential based on its natural porous characteristics. However, the acoustic performance of wood greatly limited by low permeability structures. In this study, we prepared new type cellulose (CW) using two-step delignification process basswood matrix followed supercritical CO2 drying. The as-prepared CW exhibited high air 33.78 Darcys (increase 496.82%) and superior characteristics compared to basswood, resulting in significant improvement an increased average 106.25% maximum 126.32%. dissipation energy structure well predicted designed media model. Moreover, specific stiffness 2.14 × 105 m2 s−2 diffuse reflectance 97.02% across visible light were demonstrated for as well. Such fascinating multifunctional wood-derived may provide insights into development efficient absorbers various applications.