Table 2.

Textural properties of aerogel-based scaffolds obtained from aqueous 6 wt.% alginate inks with different HA concentrations (0, 8, 16, 24 wt.%) and crosslinked by different strategies: CaCl₂ 0.5M1h/1M1h (aged aerogels), CaCl₂ 1 M (non-aged aerogels) and GA (GA-crosslinked aerogels). Notation: A_BET: specific BET surface area, d_p: BJH-mean pore diameter, V_p: BJH-specific pore volume.

Aerogel Scaffold	ABET (m2/g)	dp (nm)	Vp (cm3/g)	ρenv (g/cm3)	ρskel (g/cm3)	ε (%)
Alg 6%, HA 0%, CaCl2 1 M *	183 ± 9	19 ± 1	1.16 ± 0.06	0.14 ± 0.01 ǂ	1.18 ± 0.16	86.58 ± 2.26
Alg 6%, HA 8%, CaCl2 1 M *	118 ± 6	24 ± 1	0.99 ± 0.05	0.24 ± 0.03 ǂ	1.72 ± 0.09	85.25 ± 4.02
Alg 6%, HA 16%, CaCl2 1 M *	67 ± 3	26 ± 1	0.60 ± 0.03	0.29 ± 0.04 ǂ	1.93 ± 0.04	79.78 ± 3.92
Alg 6%, HA 24%, CaCl2 1 M *	29 ± 2	31 ± 2	0.21 ± 0.01	0.34 ±0.02 ǂ	1.72 ± 0.14	76.68 ± 3.54
Alg 6%, HA 0%, CaCl2 0.5M1h	453 ± 23	25 ± 1	3.21 ± 0.16	0.18 ± 0.01 ǂ	1.81 ± 0.08	90.32 ± 0.81
Alg 6%, HA 0%, CaCl2 1M1h	244 ± 12	24 ± 1	1.74 ± 0.1	0.19 ± 0.003	1.44 ± 0.09	86.78 ± 0.88
Alg 6%, HA 8%, CaCl2 1M1h	81 ± 4	26 ± 1	0.68 ± 0.03	0.41 ± 0.003	2.29 ± 0.03	82.27 ± 0.24
Alg 6%, HA 16%, CaCl2 1M1h	49 ± 3	28 ± 1	0.39 ± 0.02	0.55 ± 0.003	2.38 ± 0.04	76.86 ± 0.35
Alg 6%, HA 24%, CaCl2 1M1h	65 ± 3	28 ± 1	0.69 ± 0.03	0.63 ± 0.003	2.71 ± 0.05	76.77 ± 0.47
Alg 6%, CaCl2 1 M, GA	112 ± 6	19 ± 1	0.72 ± 0.04	0.22 ± 0.07 ǂ	1.49 ± 0.05	85.45 ± 4.60
Alg 6%, HA 8%, CaCl2 1 M, GA	91 ± 5	21 ± 1	0.66 ± 0.03	0.41 ± 0.09 ǂ	1.84 ± 0.04	77.50 ± 4.80
Alg 6%, HA 0%, CaCl2 1M1h, GA	26 ± 1	19 ± 1	0.15 ± 0.01	0.52 ± 0.09	1.96 ± 0.19	73.32 ± 2.62
Alg 6%, HA 8%, CaCl2 1M1h, GA	28 ± 1	24 ± 1	0.21 ± 0.01	0.68 ± 0.09	2.16 ± 0.09	68.58 ± 1.41
Alg 6%, HA 16%, CaCl2 1M1h, GA	21 ± 1	32 ± 2	0.24 ± 0.01	0.94 ± 0.20	2.33 ± 0.09	59.58 ± 1.47
Alg 6%, HA 24%, CaCl2 1M1h, GA	21 ± 1	24 ± 1	0.19 ±0.01	0.97 ± 0.13	2.37 ± 0.05	59.14 ± 0.87

* Data obtained from the literature (ref. [7]).^ǂ Data calculated following the procedure reported in ref. [7]).