Review article

The functions of acoustic materials and their relation to the structure and properties are considered. There have been obtained compositions of acoustic gas gypsum with increased sound absorption coefficients effective in functional characteristics. Citric acid was used as a gas-forming agent for the formation of a porous structure. Styrene-butadiene latex was used as a stabilizing additive in the process of gas release. The formation of a fine- crystalline structure (plate-type crystals with high cohesion) occurs when using a nanocarbon modifier. In the case of nanofiber cellulose, a gypsum stone with a fiber-like morphology is formed. The results of studies of nanomodifiers of two different types are presented (namely, nanocarbon fulleroid type and nanofiber cellulose type modifiers) and their impact on the microstructure and properties of acoustic gas gypsum is considered.