a1 Department of Bioengineering, University of Massachusetts Dartmouth, North Dartmouth, MA, 02747, U.S.A.
a2 Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, AIIM Facility and Soft Materials Group, School of Chemistry, University of Wollongong, Wollongong, NSW, 2522, Australia.
The mechanical characteristics of ionic-covalent entanglement hydrogels consisting of combinations of the biopolymers gellan gum and kappa-carrageenan, and the synthetic polymers polyacrylamide and an epoxy amine were investigated. Compression testing showed that these gels exhibited “double network” behavior, i.e. strong tough gels.