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. 2021 Jul 9;11(39):24254–24281. doi: 10.1039/d1ra03289e

Tensile and compressive mechanical properties of the hydrogels, including the as-prepared ones (PAM, LmM, BnM) (the conventional chemically crosslinked hydrogels using N,N,N′,N′-methylenebis(acrylamide) as the crosslinker, where n represents 3 × BIS/water [g L−1]) and the swollen one with 90 wt% water content (L2M-S).

Sample Yield strength [kPa] Fracture strength [kPa] Elongation at break [%] Toughnessa [MJ m−3] Compressive strengthb [MPa] Compressive modulusb [MPa]
L1M 39.5 29.3 2355 0.69 0.5 4.5
L2M 58.4 43.2 4068 1.99 0.9 12.9
L3M 62.3 45.8 4361 2.55 1.2 16.6
L2M-Sc No >34.0 >6236 >1.95
B1M 41.4 318 0.10
B2M 59.3 204 0.08
PAM 21.7 7.0 154 0.02
a

Toughness was calculated from the areas under the tensile stress–strain curves.

b

The hydrogels B1M, B2M, and PAM were too brittle to compress.

c

The swollen hydrogel L2M-S did not break during the tensile test, accompanied by the disappearance of the yielding phenomenon.