Experimental evaluation of a ductile aerogel as damping layers in gypsum wallboards for increased sound transmission loss

摘要: Low-density, highly porous solid monolithic macroscopic objects consisting of hierarchical mesoporous threedimensional assemblies of nanoparticles (aerogels) are pursued mainly for their low thermal conductivity. Unlike classical aerogels of the most common kind based on silica which are fragile materials, structural fragility issue has been addressed successfully with materials referred to as polymercrosslinked (or X-) aerogels and organic aerogels. Organic aerogels are low-density materials, yet they have significantly enhanced mechanical strengths and ductility compared with silica aerogels. This work explores ductile organic aerogels for potential use as constrained damping layers integrated into gypsum wallboards. Due to their ductility and mechanical strength, lightweight organic aerogel panels of less than 1 cm in thickness can be conveniently integrated into gypsum wallboards. The objective of this work …