Structural and acoustic properties of transparent chitosan aerogel
2019
Abstract The first report on acoustic absorption properties of transparent biopolymer aerogel is provided. Cross-linked chitosan aerogel prepared by supercritical carbon dioxide drying has a homogeneous nanofibrous structure with mesopores, the major size of which decreases from ∼45 to ∼20 nm with increasing apparent density. The aerogel shows peak-shaped sound absorption profiles, regardless of the density. This absorption is attributable to sample vibration reflecting an extremely high flow resistivity of the mesoporous structure.
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