Sound absorption performance of corncob/hemp composite fabric material

Agro-industrial waste corncob was used to develop a new thin corncob/hemp composite fabric (CHCF) material to improve the sound absorption performance of fiber materials. CHCF materials were prepared from agro-industrial waste corncob pellets and natural hemp fiber by spreading corncob pellets in hemp fiber webs, layering, and high-temperature treatment. The sound absorption performances of the CHCF material, corncob material, and hemp fiber nonwoven fabric were compared, and the effects of the size, content, and gradient mass of corncob pellets, and the gradient thickness of the hemp fiber web on sound absorption by CHCF materials were also analyzed. The results showed that the CHCF material with a smaller thickness exhibited better sound absorption than corncob material and hemp fiber nonwoven fabric, and the smaller the corncob pellet size, the better the sound absorption. The content of corncob pellets had a significant impact on the sound absorption of CHCF. The gradient structures were conducive to further improving the sound absorption of CHCF materials.