Polybenzoxazine Aerogels: Synthesis, Characterization, and Conversion to Carbon and Graphite Aerogels
Polybenzoxazines (PBOs) are phenolic resin type polymers with high strength and high temperature stability comparable to that of polyimides. Here PBO aerogels were synthesized from bisphenol A, paraformaldehyde, aniline and DMSO. Resultant aerogels are macroporous materials and were characterized chemically (13C NMR), nanoscopically (SAXS, SEM) and macroscopically (uniaxial compression, thermal conductivity). Pyrolysis at 800 ⁰C yields robust, mainly microporous carbon aerogels, while further pyrolysis at 2300 ⁰C yields highly conducting graphite aerogels (50 mho cm-1) with a rod-like microstructure. The latter are evaluated for lithium intercalation.
S. Mahadik-Khanolkar et al., "Polybenzoxazine Aerogels: Synthesis, Characterization, and Conversion to Carbon and Graphite Aerogels," Abstracts of Papers of the American Chemical Society, American Chemical Society (ACS), Apr 2013.
245th ACS National Meeting and Exposition (2013: Apr. 7-11, New Orleans, LA)
Article - Conference proceedings
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01 Apr 2013