One-step room-temperature synthesis of fibrous polyimide aerogels from anhydrides and isocyanates and conversion to isomorphic carbons

 Aerogels are low-density solids with high open porosity and surface area which have a potential niche in high temperature thermal insulation.  The classic route of synthesis involves two expensive processes, supercritical drying and high temperature imidization. 

One-step room-temperature synthesis of fibrous polyimide aerogels from anhydrides and isocyanates and conversion to isomorphic carbonsIn this study, Nicholas Leventis and co-workers in the USA have described polyimide aerogels synthesized via a low temperature process through the rather underutilized reaction of dianhydrides with diisocyanates.  These polyimide aerogels are compared with those obtained by the classic high-temperature amine route and are shown to be chemically identical but morphologically different.  Overall, the isocyanate route has several distinct advantages over the classic route.

Interested in knowing more?  Read the full article here.

Chakkaravarthy Chidambareswarapattar, Zachary Larimore, Chariklia Sotiriou-Leventis, Joseph T. Mang and Nicholas Leventis
J. Mater. Chem., 2010, Advance Article, DOI: 10.1039/C0JM01844A, Paper

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