Nanofibrous aerogels derived from electrospinning of PAN/UiO-66-NH2 for sound and thermal insulation

In general, porous materials make excellent choices for heat insulation and sound absorption. However, the broad use of porous materials is hampered by their limited mechanical stability, poor uniformity of performance, and low sound absorption coefficient below 1000 Hz. The PAN/UiO-66-NH 2 aerogel, a novel aerogel with intricately designed hierarchical and complex porosity structures, was synthesized in this work. This construction efficiently blocks the passage of heat and absorbs low-frequency sound. At 750 Hz, the PAN/UiO-66-NH 2 material's sound absorption coefficient reached 0.97, while at 250, 500, 750, and 1000 Hz, it averages 0.72. Additionally, PAN/UiO-66-NH 2 has a thermal conductivity of 26.21 mW m -1 K -1 , which can be compared to air. Notably, the PAN/UiO-66-NH 2 aerogels exhibit strong and reliable cycling performance. With a water contact angle of 132.8°, the hydrophobic material provides exceptional moisture resistance. The benefits suggest that the composite nanofiber aerogel be a suitable choice for absorbing sound, insulating buildings and cars from heat, and reducing reverberation indoors.