气凝胶
材料科学
复合材料
隔音
热导率
聚酰亚胺
复合数
保温
抗压强度
蜂巢
热分解
各向异性
热的
气象学
图层(电子)
化学
有机化学
物理
量子力学
作者
Huilong Shao,Zhifang Fei,Xiaohua Li,Zhen Zhang,Shuang Zhao,Kunfeng Li,Zichun Yang
标识
DOI:10.1016/j.matlet.2023.135402
摘要
Aerogels have enormous potential in integrated thermal insulation and noise reduction applications. According to the knowledge of the favorable mechanical and acoustic properties of honeycomb structures. We employed anisotropic "honeycomb-like" polyimide (PI) aerogels as the matrix and utilized a confined filling strategy to directionally filled continuous SiO2 aerogels into the PI aerogel matrix. This resulted in the creation of an exceptional organic–inorganic composite aerogel (PISis) with outstanding thermal and acoustic insulation performance. The radial thermal conductivity of PISis ranged from 22.37 to 27.65 mW·m−1·K−1, and the initial decomposition temperature was approximately 524–557 °C. In the frequency range of 500–6300 Hz, the average sound transmission loss (STL) of the 18 mm thick composite material reached 30.67 ∼ 31.89 dB, and the compressive strength at 10 % strain is 0.416 MPa. The PISis exhibits a density ranging from 0.1012 to 0.1302 g/cm3. These make it an ideal lightweight, high-strength, and efficient material for thermal and acoustic insulation.
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