材料科学
聚酰亚胺
气凝胶
复合材料
十二烷
纳米技术
图层(电子)
有机化学
化学
作者
Hongbo Guo,Mary Ann B. Meador,Jessica L. Cashman,David S. Tresp,Bushara Dosa,Daniel A. Scheiman,Linda McCorkle
标识
DOI:10.1021/acsami.0c09321
摘要
Polyimide aerogels using 1,12-dodecyldiamine (DADD), 3,3'-dimethylbenzidine (DMBZ), and 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) and cross linked using 1,3,5-triaminophenoxybenzene (TAB) were synthesized. Substitution of the aromatic diamine, DMBZ, with varying amounts of the aliphatic diamine, DADD, increases the flexibility in the backbone structure of the prepared aerogel. These aerogels are also lightweight, low density, have a low dielectric constant, and high modulus. Their overall properties (density, shrinkage, porosity, dielectric constant, water uptake, and modulus) and potential use as a conformal substrate for lightweight, high-performance antennas are discussed.
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