#$%^&*AU2019246910A120191031.pdf#####C: Inte oven NRPortblCC DAR 9412938_1.docx-I1/10/2019 ABSTRACT Disclosed is a resilient foam and methods of making the foam. The resilient foam includes a derivatized polyanionic polysaccharide and has an open-cell structure. When the resilient foam is contacted with water, the foam forms a thixotropic hydrogel. FIG. 2