Table 3.

Mechanical properties of the hydrogels prepared according to the Box-Behnken plan (samples 1–15), and hydrogels without rhamnolipids (control samples C1–C9).

Run	CaCl2 Concentration [mol/dm3]	Rhamnolipids Concentration [log c]	Ion Cross-linking Time [h]	Compression Load [kPa]	Flexibility [−]	Cohesiveness [−]
1	0.05	3.64	24	5.74 ± 0.06	0.861 ± 0.009	0.301 ± 0.007
2	0.25	3.64	24	35.18 ± 0.66	0.673 ± 0.006	0.613 ± 0.010
3	0.05	5.64	24	9.60 ± 0.59	0.707 ± 0.005	0.311 ± 0.009
4	0.25	5.64	24	83.04 ± 3.93	0.688 ± 0.004	0.477 ± 0.012
5	0.05	4.64	12	6.38 ± 0.48	-	0.294 ± 0.008
6	0.25	4.64	12	89.41 ± 2.48	0.662 ± 0.010	0.552 ± 0.005
7	0.05	4.64	36	38.25 ± 2.65	0.763 ± 0.009	0.425 ± 0.011
8	0.25	4.64	36	95.24 ± 0.38	0.728 ± 0.011	0.604 ± 0.013
9	0.15	3.64	12	43.50 ± 1.97	0.695 ± 0.005	0.463 ± 0.015
10	0.15	5.64	12	55.32 ± 2.04	0.773 ± 0.014	0.591 ± 0.006
11	0.15	3.64	36	52.65 ± 1.56	0.703 ± 0.008	0.598 ± 0.005
12	0.15	5.64	36	67.45 ± 2.52	0.669 ± 0.007	0.590 ± 0.010
13	0.15	4.64	24	27.85	0.648	0.465
14	0.15	4.64	24	26.56	0.638	0.477
15	0.15	4.64	24	29.14	0.658	0.453
C1	0.05	-	12	7.50 ± 0.33	-	0.349 ± 0.005
C2	0.05	-	24	22.76 ± 1.01	0.907 ± 0.005	0.312 ± 0.004
C3	0.05	-	36	38.13 ± 1.15	0.709 ± 0.007	0.406 ± 0.005
C4	0.15	-	12	66.94 ± 3.47	0.744 ± 0.008	0.509 ± 0.008
C5	0.15	-	24	68.88 ± 2.43	0.688 ± 0.010	0.535 ± 0.010
C6	0.15	-	36	71.20 ± 4.02	0.751 ± 0.004	0.479 ± 0.007
C7	0.25	-	12	82.48 ± 4.87	0.673 ± 0.004	0.587 ± 0.011
C8	0.25	-	24	91.72 ± 1.40	0.738 ± 0.012	0.585 ± 0.009
C9	0.25	-	36	93.14 ± 3.60	0.824 ± 0.006	0.558 ± 0.013