材料科学
抗压强度
聚酰亚胺
复合材料
海绵
多孔性
压缩(物理)
碳化
热的
扫描电子显微镜
图层(电子)
植物
生物
物理
气象学
作者
Shaohua Jiang,Jun Young Cheong,Jong Seok Nam,Il‐Doo Kim,Seema Agarwal,Andreas Greiner
标识
DOI:10.1021/acsami.0c02004
摘要
A relatively low compressive strength significantly limits the practical application of sponges made from electrospun fibers because of an ultralow density <10 mg/cm3. To solve this problem, fibrous polyimide sponges with high density (HDPISG) were prepared using a "self-gluing" concept. The HDPISG have a density of up to 280 mg/cm3 and porosity >80%, and showed good breathability. The compressive strength increased significantly as the sponge densities increased. The HDPISG with a density of 280 mg/cm3 has the highest compressive strength of 5190 and 35,900 kPa under 50 and 80% compression, respectively. The small HDPISG can even hold weights more than ten thousand times of the weight of the sponge. The HDPISG also possess excellent mechanical properties after thermal treatments and no loss of compressive strength can be seen after heating at 300 °C for 30 h. Further study indicates that the HDPISG can maintain their main shape after carbonization.
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