Table 1: The absorption of SAP after modification by different surface cross-linking reagents.

Types of cross-linking agentsWater absorption rate (g/g)Moisture absorption (humidity resistance)Gel strengthDispersion

Blank903EasyLow and viscousPoor
Ethylene glycol861EasyHigh, viscousBetter
Diethylene glycol859PoorHigh, relatively dryBetter
Epoxy chloropropane (ECH)832PoorHigh, dryGood
Ethylenediamine878EasyHigh, viscousBetter
Polyethylene glycol856EasyHigh, viscousPoor