Yan Jiatong, Jiang Shan, Lin Chuanxi, Wang Weijie, Liu Li, Tang Hong, Guo Ronghui
College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China; Yibin Industrial Technology Research Institute of Sichuan University, Yibin, Sichuan, China; Ministry Education Key Lab Leather Chemistry & Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
College of Chemistry, Sichuan University, Chengdu 610065, China.
Int J Biol Macromol. 2025 Sep;322(Pt 1):146476. doi: 10.1016/j.ijbiomac.2025.146476. Epub 2025 Jul 30.
The noise pollution and climate warming have attracted more and more attention due to the rapid development of urbanization and industry. The preparation of lightweight aerogels with excellent acoustic performance, thermal insulation, and flame retardancy can quickly adapt to practical environments. Inspired by the breakwater, ZB@BC aerogels were successfully synthesized by sol-gel process, freeze-drying, and adsorption and precipitation. Noise reduction coefficient (NRC) value of ZB@BC composite aerogels is 0.48 and average sound absorption coefficient is 0.72 in 800-6300 Hz. Average transmission loss is 30.31 dB in 50-6300 Hz when the volume of sound source is 85 dB. In addition, ZB@BC composite aerogels exhibit excellent thermal conductivity (0.053 W/mK at 25 °C). The surface temperature is only 42.1 °C when the ZB@BC aerogel is placed on hot stage (100 °C), which proves its thermal insulation performance. Specifically, ZB@BC composite aerogels are flame-retardant with the limit oxygen index (LOI) value of 30.6 %. ZB@BC composite aerogels show compressive strength of 0.28 MPa and Young's modulus of 2.79 MPa. ZB@BC composite aerogels exhibit the advantages of low density, excellent acoustic performance, thermal insulation, flame retardancy, and mechanical strength compared with commercial acoustic and thermal insulation materials.
随着城市化和工业的快速发展，噪声污染和气候变暖越来越受到关注。制备具有优异声学性能、隔热性和阻燃性的轻质气凝胶能够快速适应实际环境。受防波堤的启发，通过溶胶 - 凝胶法、冷冻干燥以及吸附沉淀成功合成了ZB@BC气凝胶。ZB@BC复合气凝胶的降噪系数（NRC）值为0.48，在800 - 6300Hz范围内平均吸声系数为0.72。当声源体积为85dB时，在50 - 6300Hz范围内平均传输损失为30.31dB。此外，ZB@BC复合气凝胶表现出优异的热导率（25°C时为0.053W/mK）。当ZB@BC气凝胶放置在热台（100°C）上时，表面温度仅为42.1°C，这证明了其隔热性能。具体而言，ZB@BC复合气凝胶具有阻燃性，极限氧指数（LOI）值为30.6%。ZB@BC复合气凝胶的抗压强度为0.28MPa，杨氏模量为2.79MPa。与商用声学和隔热材料相比，ZB@BC复合气凝胶具有低密度、优异的声学性能、隔热性、阻燃性和机械强度等优点。
