Supermacroporous chemically cross-linked poly(aspartic acid) hydrogels.Chemically cross-linked poly(aspartic acid) (PASP) gels were prepared by a solid-liquid phase separation technique, cryogelation, to achieve a supermacroporous interconnected pore structure. 
Supermacroporous chemically cross-linked poly(aspartic acid) hydrogels
The morphology of the hydrogels was characterized by scanning electron microscopy and interconnectivity of the pores was proven by the small flow resistance of the gels. 
scanning electron microscopy