Facile fabrication of multifunctional monolithic polyamide aerogels
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The polyamide (PA) aerogels with good-formability via a sol–gel technology were facilely fabricated by using melamine and aroyl chloride followed by CO2 supercritical drying. The synthesis procedure was straightforward and simple, relying on no nitrogen-based protective atmosphere. The influences of aroyl chloride monomer on the gelation time and aerogel structure were discussed. The structural properties of PA aerogels were characterized by the scanning electron microscopy (SEM) and Brunauer–Emmett–Teller methods (BET). The results indicated that the PA aerogels had a typical three-dimensional porous structure. The PA aerogels exhibited well multifunctional properties, such as flame resistance, thermal insulation, dielectric characteristics and mechanical properties. Due to well multifunctional properties, the PA aerogels had potential for the use in construction and building materials.
KeywordsPolyamide aerogels Sol–gel method Aroyl chloride monomer Multifunctional properties
This research was financially supported by the National Natural Science Foundation of China (Grant No. 51502274), the Doctoral Research Fund of Southwest University of Science and Technology (No. 15zx7137, 16zx7142), and the Research Fund for Joint Laboratory for Extreme Conditions Matter Properties (No. 13zxjk04, 14tdjk03).
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