Table 5. Absorption Performances of SAH with or without Surface-crosslinking.

	CRC (g/g)	AUL (g/g)	Water permeability (s)
None*	40	12	300
Surface-crosslinking**	35	20	60

Reaction conditions: molar ratio of IA and comonomer = 7:3, polymerization temperature = 60°C, neutralization degree = 40 mol%, inner crosslinker content (TTEGDA) = 1.5 wt%, initiator content (APS) = 0.75 mol/L, medium volume = 50 mL, and kaolin content = 2 phr.
Surface-crosslinking conditions: medium (water: methanol = 3:7) volume ratio = 1 wt%, reaction temperature = 170°C, reaction time = 30 min, and surface crosslinker content (BD) = 1 wt%.