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US 10,994,260 B2Granted
Superabsorbent polymeric structures
AssigneeTechnion Research & Development Foundation Limited
InventorsSebastijan Kovacic, Michael S. Silverstein
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Abstract
Provided herein is a superabsorbent polyHIPE composition-of-matter comprising a majority of ionizable pendant groups, capable of absorbing up to 300-fold by mass water while exhibiting a notable mechanical strength in both the dry and wet form, as well as various uses thereof.
Claims7
A flood or spill control device comprising a super-absorbent material, wherein:
- said super-absorbent material comprises a crosslinked polymer having a microstructure of a polymerized external phase of a high internal phase emulsion and characterized by a dry density that ranges from 0.05 g/cm3 to 0.4 g/cm3 and derived from an oil-in-water high internal phase emulsion that comprises an organic internal phase and an aqueous external phase (oil-in-water emulsion);
- said crosslinked polymer is further characterized by a crosslinking level that ranges from 0.1 to 15 mol percent;
- said crosslinked polymer having a plurality of pendant groups, at least a portion of which are ionizable pendant groups that are more strongly hydrated than a carboxylic pendant group, such that said super-absorbent material is characterized by an equilibrium aqueous medium absorption of at least 8 g/g and a compressive failure strain of at least 25% when the super-absorbent material is fully swollen with said aqueous medium.
Dependencies are inferred from the claim text.