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US 10,449,516 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.
Claims20
A composition-of-matter comprising a crosslinked polymer, the composition-of-matter 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, wherein:
- the composition-of-matter is derived from an oil-in-water emulsion which is a high internal phase emulsion that comprises an organic internal phase and an aqueous external phase;
- a crosslinking level of said crosslinked polymer ranges from 0.1 to 15 mol percent;
- said crosslinked polymer is 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 the composition-of-matter 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 composition-of-matter is fully swollen with said aqueous medium.
4 more elements
Dependencies are inferred from the claim text.