Rigid materials having high surface area and low density
AssigneeAlliedSignal Inc.
InventorTammy Smith
Life of this patent
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Abstract
This invention relates to highly porous, crosslinked bodies derived from nitrogen-containing polymers, and a process of producing the porous bodies which comprises dissolving a nitrogen-containing polymer to form a gel, ionically crosslinking the gel, and covalently further crosslinking the ionically crosslinked gel body.
Claims7
A crosslinked porous body comprising a nitrogen-containing polymer crosslinked with an anionic salt solution and further crosslinked with a covalent-crosslinking agent selected from the group consisting of dialdehydes, aromatic dihalides, formaldehyde, epichlorohydrin, imididates, disulfonyl chlorides, diacid halides, aliphatic dihalides, bisepoxides, diesters, diazides, carbodiimides, aromatic and aliphatic diisocyanates, aromatic and aliphatic diisothiocyanates, aromatic bis-azido compounds, 1-fluoro-2-nitro-4-azidobenzene, p-azidophenacyl bromide, N-(azidonitrophenyl)-.gamma.-aminobutyrate hydroxysuccinimide ester, genipin, butene-3,4-oxide, pentafluorobenzaldehyde, chlorobenzaldehyde, fluorobenzaldehyde, and mixtures thereof, wherein said porous body has an apparent bulk density of equal to or less than about 0.6 g/cm.sup.3 and a surface area of at least 5 m.sup.2 /g.
A crosslinked porous body comprising chitosan crosslinked with a tripolyphosphate solution and further crosslinked with glutaraldehyde, wherein said porous body has an apparent bulk density of equal to or less than about 0.6 g/cm.sup.3 and a surface area of at least 5 m.sup.2 /g.
Dependencies are inferred from the claim text.